UnQTools

1670 Tools Available

Every tool you need,
all in your browser

1670 fast, free, offline-capable browser tools — converters, calculators, generators, formatters. No uploads, no tracking, no accounts.

100% Private Works Offline Instant

.bashrc / .zshrc Alias & Config Manager

Build shell aliases, functions, exports, and PATH edits in a visual editor, then export a clean, commented .aliases file sourced from both .bashrc and .zshrc — with shadowing detection against shell builtins and common CLI tools, function suggestions when args are needed, starter packs (git, docker, kubectl, navigation, safety, ls, dev, devops, data science), import of existing rc files, dedupe, history (localStorage), and shareable URL. 100% client-side.

.htaccess Generator

Generate Apache .htaccess rules: redirects (301/302), URL rewrites, auth, IP allow/deny, custom error pages, security headers, HTTPS force, www force, and 10+ extras. 100% private.

3D Shape Constructor

Calculate 3D shape properties: surface area, volume, nets for common shapes. 100% private. 100% private.

7Z Extractor

Inspect and extract files from 7z archives. Detects the 7z signature (0x37 0x7A 0xBC 0xAF 0x27 0x1C), parses the SignatureHeader and StartHeader, lists files from the archive metadata, and extracts STORE-method files when possible. Honest about LZMA compression limitations. 100% client-side.

Abstract Generator

Generate extractive summaries from long text with IMRaD-aware scoring. 100% private. 100% private.

Acceleration & Force Calculator

Calculate F=ma with solve-for-any-variable and unit conversion. 100% private. 100% private.

Acronym Expander

Expand common acronyms and abbreviations with a configurable dictionary. 100% private. 100% private.

Acronym Generator

Generate backronyms from keywords with custom dictionaries and random modes. 100% private. 100% private.

Active Voice Suggestion Engine

Detect passive voice and suggest active voice rewrites. 100% private. 100% private.

Add / Subtract Date Calculator

Add or subtract years, months, weeks, days, hours, minutes and seconds from a starting date/time. Calendar-day or business-day mode with custom weekend + holiday list. Month-end policy toggle (clamp to last day vs overflow). Repeat/series mode (e.g. every 2 weeks x 10) with CSV export. Shareable URL. 100% client-side.

Add Attachment (Embedded File) to PDF

Embed files as attachments in PDF. Any file type, bulk, extract later.

Add Attachment (Embedded File) to PDF

Embed files as attachments in PDF. Any file type, bulk.

Add Attachment to PDF

Embed files as attachments in PDF. Documents, images, any file type.

Add Background Image to PDF

Add image background to PDF pages. Cover/contain, opacity, position.

Add Background Image to PDF

Add image background to PDF pages. Cover/contain, opacity.

Add Background to PDF

Add color or image background to PDF pages. Opacity, position, tiled option.

Add Confidential/Draft Stamp

Add Confidential, Draft, or custom stamps to PDF. Presets.

Add Confidential/Draft Stamp to PDF

Add Confidential, Draft, or custom stamps to PDF. Quick presets.

Add Header & Footer (Advanced)

Advanced header/footer for PDF. Different first/odd/even pages, fields.

Add Header & Footer (Advanced)

Advanced header/footer for PDF. Different first/odd/even pages.

Add Header & Footer to PDF

Add headers and footers to PDF pages. Text, page numbers, date, custom position.

Add Line Breaks

Insert line breaks into text — word-wrap at a column width, split on a delimiter, or break every N characters/words. Unicode-correct, word-safe, with CJK/emoji support. 100% private.

Add Line Numbers

Add sequential line numbers to text. Custom format, padding, start, step. Skip empty lines.

DeveloperComing Soon

Add Margins to PDF

Add margins/whitespace to PDF pages. Custom margin size, all sides or per-side.

Add Margins/Whitespace to PDF

Add margins and padding to PDF pages. All sides or per-side control.

Add Margins/Whitespace to PDF

Add margins and padding to PDF pages. All sides or per-side.

Add Page Border to PDF

Add decorative border/frame to PDF pages. Color, width, style options.

Add Page Border/Frame to PDF

Add decorative borders or frames to PDF pages. Style, color, width.

Add Page Border/Frame to PDF

Add decorative borders or frames to PDF pages. Style, color.

Add Page Numbers (Advanced)

Add page numbers with advanced options. Position, format, skip first N.

Add Page Numbers (Advanced)

Add page numbers with advanced options. Position, format, skip.

Add Page Numbers to PDF

Add page numbers to PDF. Position, format, starting number, font customization.

Add Prefix/Suffix to Lines

Add a prefix and/or suffix to every line — wrap in quotes, build HTML lists, add SQL commas, number lines with a counter token. Skip empty, regex-conditional, escape for JSON/HTML/SQL. 100% private.

Add Stamp to PDF

Add a stamp to PDF pages — choose from APPROVED, DRAFT, CONFIDENTIAL, PAID, RECEIVED, REJECTED, or custom text. Set position, size, color, and date. 100% private.

Add Stamp to PDF

Add custom stamps to PDF. Approved, Draft, Confidential, Custom text, date stamps.

Add Stamp to PDF (Advanced)

Add custom stamps to PDF. Dynamic stamps with date, user, custom text.

Add Stamp to PDF (Advanced)

Add custom stamps to PDF. Dynamic stamps with date, user.

Advanced Markup Calculator

Calculate markup, margin, retail price, cost with tax. 100% private. 100% private.

AES Encrypt/Decrypt

AES-GCM/CBC/CTR/CFB/OFB/ECB. 128/192/256-bit. PBKDF2 key derivation. WebCrypto.

DeveloperComing Soon

AES-256 Encryptor / Decryptor

Encrypt and decrypt text with AES-256-GCM via the Web Crypto API. PBKDF2 key derivation, salt + IV, and 10+ extras. 100% private — runs in your browser.

Affiliate Commission Calculator

Calculate affiliate commissions across four program types — flat percent, tiered percent (progressive brackets), recurring (monthly × N months), and hybrid (initial + recurring). Apply refund-rate and tax-withholding adjustments, compute effective commission rate, compare two program types side-by-side, and project break-even sales to hit a target income. History (localStorage) + shareable URL. 100% client-side.

Affiliate Link Cloaker & Redirect Generator

Cloak affiliate links into pretty URLs and generate redirect scripts (PHP, JavaScript, HTML meta refresh), plus .htaccess, nginx, and robots.txt rules. CSV import of slug/affiliate_url pairs, slug auto-generator from hostname, click-tracking parameter builder, URL-shortener compatibility check, history (localStorage), shareable URL. 100% client-side.

Age Calculator

Calculate exact age from a birth date in calendar years/months/days (no negative-day bugs) plus totals in months/weeks/days/hours/minutes/seconds. Next-birthday countdown with weekday. Feb-29 birthday policy toggle. Milestones (1,000 days, 10,000 days, 1 billion seconds). Zodiac sign + Chinese zodiac. Age gap comparison. Shareable URL. 100% client-side.

AI .htaccess Redirect Generator

Generate Apache .htaccess redirect and rewrite rules from bulk old→new URL pairs or plain-language intent. Supports 301 permanent, 302 temporary, 307, RedirectMatch, RewriteRule with regex capture groups, www/non-www canonicalization, HTTP→HTTPS, hotlink protection, custom error pages, and IP allow/block. Per-rule explanations, sample-URL tester emulating mod_rewrite, and redirect-loop detection. Pure-JS engine — optional BYO-key LLM. 100% client-side, no upload.

AI Alt Text Generator for Images

Generate WCAG-friendly alt text for images. On-device metadata extractor (dimensions, format, dominant color, filename → suggest), context-aware descriptive templates, decorative vs informative vs complex classifier, length meter, 'don't start with image of' linter, optional SEO keyword weaving, 100+ language templates, batch CSV/JSON export, optional BYO-key LLM caption enhancement. 100% client-side — images never uploaded.

AI Analogies Generator

Explain any concept with tailored analogies across 10+ domains (cooking, sports, nature, technology, music, business, science, everyday life, kids, vehicles). Pure-JS analogy template engine with metaphor / simile / story styles, complexity levels, 'where it breaks down' honesty notes, explainer expansion, concept keyword extractor, audience presets, optional BYO-key LLM enhancement. 100% client-side — nothing uploaded.

AI API Payload Mocking Tool

Generate realistic mock API responses from OpenAPI spec, JSON sample, or described endpoint. Pure-JS faker-style data (names, emails, phones, UUIDs, dates, addresses), CRUD route config, latency/error/status simulation, scenario presets (empty/error/large/paginated), Mockoon-style export, optional BYO-key LLM enhancement. 100% client-side — nothing uploaded.

AI Article Headline Generator

Generate 10+ scored, A/B-ready article headlines from a topic or draft. Pure-JS headline formula library (How-To, List, Question, Bold Statement, Number, Contrarian, Benefit, Curiosity, How-Long, Secret) × emotional triggers × power words. Scores each headline on length, power words, emotional resonance, clickability, and SERP pixel width. Style presets, A/B pair picker, meta-description pairing, clickbait warning, optional BYO-key LLM enhancement. 100% client-side — nothing uploaded.

AI Bias Checker for Articles

Detect framing, loaded language, political lean, and sensationalism in articles. Pure-JS lexicons (left/right lean, loaded verbs, subjective adjectives, weasel words, hedges, passive-evasion), multi-axis scoring (political, emotional, factual, one-sidedness), inline phrase highlighting with neutral-rewrite suggestions, fact-vs-opinion sentence tagging, missing-perspective checklist, clickbait detector, Flesch readability, Markdown/JSON/HTML export, optional BYO-key LLM enhancement. 100% client-side — text never uploaded.

AI Book Summary Generator

Generate chapter + key-idea summaries from book-length text using extractive summarization. Pure-JS engine: sentence scoring (TF + position + keyword + cue), chapter detection, premise + key ideas + chapter breakdown + takeaways + Q&A + outline. 3 depth levels. 100% client-side — optional BYO-key LLM enhancement. Nothing uploaded.

AI Brand Positioning Statement Generator

Generate classic brand positioning statements from structured inputs using Moore, April Dunford, Jobs-to-be-Done, and Geiger frameworks. Tone variants (concise, energetic, formal), auto-derived messaging pillars, elevator pitch, taglines, generic-differentiator sharpener, Markdown/JSON export, history (localStorage), shareable URL, optional BYO-key LLM polish. 100% client-side — your inputs never leave the browser.

AI Brand Tone of Voice Builder

Build an AI-operable brand voice guide from your sample content. Six Nielsen-Norman-style tone dimensions (formal↔casual, funny↔serious, respectful↔irreverent, matter-of-fact↔enthusiastic, subversive↔conservative, cynical↔earnest), heuristic sample analysis, do/don't rules, approved/avoid vocabulary, sentence-rhythm notes, before/after examples, reusable system prompt, check-a-draft mode, inclusivity checks, Markdown/JSON export, history, shareable URL, optional BYO-key LLM. 100% client-side — your samples never leave the browser.

AI Business Name Ideator

Generate 30+ themed business / brand name ideas from your keywords, industry, and style (modern, classic, playful, techy) using combinatorial templates — compounds, portmanteaus, invented words, affixes, alliteration. Brandability scoring (length, syllables, pronounceability, uniqueness), suggested domain patterns with one-click registrar links, social-handle patterns, trademark-caution note, tagline pairing, favorites, CSV export, history (localStorage), shareable URL, optional BYO-key LLM polish. 100% client-side — name generation never leaves the browser.

AI Business Pitch Deck Outline Generator

Generate a structured, investor-ready pitch deck outline — the canonical 10–12 slides (Problem, Solution, Market, Product, Traction, Business Model, GTM, Competition, Team, Financials, Ask) with per-slide talking points, what investors look for, and common pitfalls. Deck-type presets (pre-seed, seed, Series A, sales deck), narrative-arc check (problem→solution→why-now→why-you), use-of-funds + milestones guidance, speaker-notes mode, Markdown export, history (localStorage), shareable URL, optional BYO-key LLM polish. 100% client-side — your startup data never leaves the browser.

AI Character Name Generator

Generate culture-aware character names across genres (fantasy, sci-fi, modern, historical, cyberpunk, mythic) and cultures (English, Spanish, Japanese, Arabic, Indian, Nordic, Slavic, African, Celtic, Chinese). Each name comes with pronunciation guide, stylistic meaning, 3–5 variants, matching epithet/title, place name, and faction name for worldbuilding coherence. Phonetic-feel controls (soft/flowing vs harsh/guttural), gender-neutral option, era filter, name-clash checker against your existing cast, culture-mix warnings, seeded reproducibility, favorites (localStorage), history (last 20), shareable URL, CSV/Markdown/JSON export, optional BYO-key LLM polish. 100% client-side — generation never leaves the browser.

AI Chat with PDF

Ask questions about your PDF and get answers grounded in its content with page-cited quotes — 100% private, in-browser text extraction and keyword retrieval. No uploads, no API keys needed.

AI Chat with PDF (Q&A)

AI-powered Q&A with PDF. Natural language queries, cited answers.

AI Chat with PDF (Q&A)

AI-powered Q&A with PDF. Natural language queries, cited answers.

AI Chatbot Emulator

Build and test a knowledge-base chatbot right in the browser. Paste or upload your FAQ / docs as Q&A pairs, define a persona + system prompt, set tone and guardrails, then chat with the bot using a pure-JS retrieval engine (TF-IDF + Jaccard + Levenshtein fuzzy matching) that cites which KB chunk was used. Intent detection (greeting, farewell, thanks, question), configurable fallback rules, confidence scoring, KB chunking, KB validation with warnings, multiple saved bots (localStorage), transcript export (text / Markdown / JSON), shareable URL with full bot config, JSON config import / export, optional BYO-key LLM enhancement (OpenAI / Anthropic). 100% client-side — your KB never leaves the browser unless you explicitly enable LLM polish.

AI Chrome Extension Boilerplate Generator

Generate a ready-to-load Manifest V3 Chrome extension scaffold in-browser: valid manifest.json, popup/options/content-script/background service worker/side-panel files, framework picker (Vanilla/React/Vue), permission catalog with explanations and over-broad warnings, cross-browser Firefox manifest variant, Vite/HMR build config, message-passing + storage helpers, icons placeholder, README, file-tree preview, and a downloadable ZIP — no CLI, no sign-up, no uploads. 100% client-side with optional BYO-key LLM polish.

AI Citation Formatter

Format citations in APA 7, MLA 9, Chicago, Harvard, and IEEE styles for books, journal articles, websites, and newspapers. Per-style full-reference + in-text citation generators, author parser, page-range formatter, sortable reference list, confidence flags per field, validators for DOI/ISBN/URL, and export to plain text, Markdown, HTML, BibTeX, RIS, and JSON. Local library persistence (localStorage), history (last 20), shareable URL. 100% client-side formatting with optional BYO-key LLM polish. No ads, no login, no uploads.

AI Code Converter

Translate code between Python, JavaScript, TypeScript, Java, C++, Go, and Ruby using on-device pattern-based transpilation for common constructs (loops, conditionals, functions, classes, variables, prints, lists, dicts, comments). Idiomatic output, change explanations, side-by-side diff, library/dependency mapping notes, comment-preservation toggle, snippet-vs-file mode, language auto-detect, unsupported-feature flags, copy/download, local history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement for complex translations — your code never leaves the browser unless you choose to call your own provider.

AI Code Debugger & Bug Finder

Static analysis + bug finder for Python, JavaScript, TypeScript, Java, C++, and Go. Detects undefined variables, missing returns, off-by-one loops, = vs == bugs, == vs === in JS, mutable default arguments, var usage, console.log leftovers, TODO/FIXME markers, empty catch blocks, magic numbers, infinite loops, unreachable code, missing break in switch, hardcoded credentials, division-by-zero literals, mismatched brackets, and more. Per-language rule sets, severity classification (info/warning/error/critical), line numbers, suggested fixes, auto-fix button for safe corrections, side-by-side diff view, runtime-error root-cause guesser, cyclomatic complexity hint, code-smell detection, sample buggy snippets, stats per severity, local history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement for explanations — your code never leaves the browser unless you choose to call your own provider.

AI Code Explainer — Line-by-Line, Multi-Language

Line-by-line plain-English code explainer for Python, JavaScript, TypeScript, Java, C++, and Go. Detects constructs (functions, classes, loops, conditionals, try/catch, switch, imports, async/await, decorators), generates an overall summary plus a per-line explanation, supports a depth slider (beginner / intermediate / expert / ELI5), Big-O complexity hint, library & API identification, security-smell callouts, data-flow notes, inline-comment injection (writes comments next to each line), block-grouped explanations, basic translation of explanations to Spanish/French/German/Chinese/Japanese, sample snippets per language, local history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement for prose — your code never leaves the browser unless you choose to call your own provider.

AI Coding Pattern Refactorer — Smells, Diffs & GoF Patterns

Detects code smells (long methods/functions, deep nesting, magic numbers, duplicated code, switch statements, god classes, long parameter lists, comments-as-deodorizer) and proposes named refactorings (Extract Function, Replace Conditional with Strategy, Replace Nested Conditional with Guard Clauses, Introduce Parameter Object, Replace Magic Number with Symbolic Constant, Extract Class, etc.) and GoF design patterns (Singleton, Factory, Builder, Adapter, Decorator, Facade, Observer, Strategy, State, Command, Template Method, Visitor, and 10 more) with reviewable before/after diffs, rationale, tradeoffs, accept/reject per suggestion, apply-all-safe-refactorings button, complexity metrics (cyclomatic, lines, functions, max nesting, duplicates), 22-pattern browseable catalog with intent/when-to-use/when-not-to-use/templates, multi-language support (Python, JavaScript, TypeScript, Java, C++, Go), sample snippets per language, local history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement — your code never leaves the browser unless you choose to call your own provider.

AI Cold Email Personalizer

Generate research-grounded cold emails from prospect context you paste, not creepy scraping. Strong first line, tight body, clear CTA, tone control, spam-trigger check, readability meter, 5+ variations, follow-up sequence, merge-field template. 100% client-side — your inputs never leave the browser. Optional BYO-key LLM polish.

AI Competitor Analysis Framework Draft

Generate a structured competitive-analysis draft from your inputs: feature/pricing comparison matrix, per-competitor SWOT, Porter's Five Forces, market positioning map, and white-space opportunity callouts. Multiple frameworks (SWOT, Feature Grid, Porter's, Perceptual Map) with synthesis of your notes. 100% client-side — your inputs never leave the browser. Optional BYO-key LLM polish.

AI Copywriting Framework Assistant

Generate on-brand marketing copy structured by proven frameworks: AIDA, PAS, FAB, BAB, and 4Ps. Each stage is labeled and editable. Multiple variants, tone + length control, channel presets, swipe-file save (localStorage), explainer notes, shareable URL. 100% client-side, no login, no upload. Optional BYO-key LLM polish.

AI Cover Letter Writer

Draft a JD-tailored cover letter from your experience + the job description. Tone control (formal / warm / confident), length presets, requirement-to-evidence mapping, de-cliché pass, unsupported-claim flagging. 100% client-side — your resume and JD never leave the browser. Optional BYO-key LLM polish.

AI Cron Job Scheduler Builder

Convert plain English to cron expressions and back. 'every 5 minutes', 'daily at 9am', 'every Monday' → cron. Validate, explain, preview next N run times (timezone-aware), Quartz 6/7-field support, @yearly/@daily macros, DOM/DOW union warning, crontab line + systemd timer output. History (localStorage), shareable URL, optional BYO-key LLM polish. 100% client-side — nothing uploaded.

AI CSS UI Component Generator

Describe a UI component in plain English ('pricing card with toggle', 'navbar with search') and get clean, responsive HTML + CSS, Tailwind utility classes, or inline-styled markup with a live sandboxed preview. Built-in component template library (buttons, cards, modals, navbars, forms, alerts, badges, dropdowns, tabs, hero, footer, accordion, tooltip, progress, input) with theme controls (color, radius, font, dark mode), accessibility checks, refinement parser, variant generator, and component scorer. 100% client-side — optional BYO-key LLM enhancement.

AI CTA Generator

Generate high-converting calls-to-action tuned to your goal, product, audience, and tone. Built-in persuasion-angle library (urgency, curiosity, benefit, social-proof, scarcity, FOMO, value, action, question, contrast) with placement-specific outputs (button microcopy, banner, email CTA, inline link, popup), strength scoring per variant, automatic A/B pair generation with hypothesis, platform character-limit presets (Google Ads, Facebook, email subject, push, SMS), swipe file favorites, power-word library, current-CTA analyzer, and copywriting framework (AIDA/PAS) tags. 100% client-side — optional BYO-key LLM enhancement.

AI Customer Support Script Writer

Generate staged, tone-tuned customer-support scripts for 12 scenarios (refund, complaint, technical issue, cancellation, billing, outage, upsell, onboarding, feature request, shipping delay, account reactivation, password reset). Empathetic openers, acknowledgment, investigation, resolution, objection handling, and closing — driven by channel (chat/email/phone), tone (empathetic/formal/friendly), variables, brand-voice profile, de-escalation presets, and a reusable macro library. History (localStorage), shareable URL, optional BYO-key LLM polish. 100% client-side — nothing uploaded.

AI DB Schema Diagram Builder (Mermaid.js)

Describe your tables in plain English or paste SQL DDL and get Mermaid.js erDiagram code with entities, typed columns, PK/FK/UK markers, and crow's-foot 1:1 / 1:N / N:M relationships. Live preview, copy, export SVG/PNG via mermaid.live, DBML export, schema validation, and FK inference from naming conventions. 100% client-side — nothing uploaded.

AI Dockerfile Builder — Multi-Stage & Optimized

Describe your stack (language, framework, port) and get an optimized multi-stage Dockerfile with minimal base image, layer caching, non-root user, healthcheck, plus a matching .dockerignore, per-instruction explanations, hadolint-style security/size lint, Docker Compose companion, and an import-to-optimize flow. Templates for Node.js, Python, Go, Rust, Java, and Ruby. 100% client-side — nothing uploaded.

AI Domain Name Generator

Generate short, brandable domain names from a keyword or idea using combinatorial templates (prefix + root + suffix, blends, compounds, coined words) × TLD patterns (.com, .io, .ai, .co, .app, .so, .dev, .xyz). Brandability score (memorability, pronounceability, length, uniqueness), TLD suggestions with one-click registrar-neutral search links (Namecheap + Google Domains), social-handle patterns, trademark-caution note, filters (length / no-hyphen / no-number), favorites, CSV/Markdown/JSON export, history (localStorage, last 20), shareable URL, optional BYO-key LLM polish. 100% client-side — name generation never leaves the browser.

AI Email Draft Generator

Draft professional emails from a short brief or pasted thread — purpose + tone + length control. Nine purpose presets (request, follow-up, thank you, apology, announcement, newsletter, intro, decline, cold outreach), five tones (formal, friendly, casual, urgent, persuasive), three lengths. Compose mode + reply mode (addresses each point in the thread). Subject-line variants, bullet-to-prose, shorten/lengthen, signature insert, copy, mailto: link, .eml export, history (localStorage, last 20), shareable URL, optional BYO-key LLM polish. 100% client-side — drafts never leave the browser.

AI Emoji Translator

Translate text↔emoji in both directions with adjustable density (sparse/medium/dense), per-word alternative emoji picker, polysemy disambiguation, and Unicode + Discord/Slack shortcode output. Bundled 500+ word emoji lexicon. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Essay Outline Generator

Generate thesis-driven essay outlines from a topic. Five essay types (argumentative, expository, narrative, compare-contrast, persuasive) with thesis variants, hook suggestions, section topic sentences, evidence/citation slots, counterargument + rebuttal (argumentative), and word-count estimates per section. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI FAQ Generator

Generate structured FAQs from a topic or pasted content. Eight question types (What, How, Why, When, Where, Who, Which, Can) × topic keywords → 10+ grounded Q&A pairs grouped by type. Outputs Markdown, HTML accordion, and ready-to-paste JSON-LD FAQPage schema for SEO rich results. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Fiction Story Generator

Generate fiction stories from a premise with genre (fantasy, sci-fi, mystery, romance, horror), tone (light/dark/comedic/dramatic/neutral), POV (first/third-limited/third-omniscient/second), and length controls. Six-stage plot arc (setup, inciting incident, rising action, climax, falling action, resolution), character sheets, story-bible for consistency, expand/regenerate/continue per section. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Financial Goal Planner

Build a prioritized savings and debt-payoff roadmap from your goals (emergency fund, debt payoff, house, retirement, vacation, education), income, timeline, and current savings. Compound-growth projections, snowball/avalanche debt schedules, milestone tracking, scenario compare, and what-if sliders. Pure-JS template engine with transparent math — optional BYO-key LLM. 100% client-side, no bank linking, no sign-up, no upload.

AI Flashcard Q&A Generator

Paste notes or text and instantly get editable Q&A flashcards with cloze deletions, true/false, fill-in-the-blank, and multiple-choice variations. Built-in SM-2 spaced-repetition study mode with self-grading, difficulty tags, deck management, and export to Anki CSV, Quizlet, and JSON. Pure-JS template engine — optional BYO-key LLM. 100% client-side, no sign-up, no upload.

AI Gift Idea Generator

Generate personalized, ranked gift ideas from a recipient profile (relationship, age, interests, occasion, budget, and a 'gifts to avoid' anti-repeat list). Gift database with 60+ curated ideas spanning 6 recipients × 4 occasions × 5 interests, price tiers (low / mid / splurge), 'why this fits' reasoning per idea, and neutral shopping hints (category + search term) — never affiliate links. Save recipient profiles locally, history (last 20), shareable URL, copy/print/export. 100% client-side, no sign-up, no upload, optional BYO-key LLM polish.

AI Git Commit Message Generator

Paste a git diff and get a clear Conventional Commits message (type, scope, subject, body, footer) plus gitmoji, plain, and subject+body styles. Parses file changes, additions/deletions, classifies change type (feat / fix / docs / refactor / test / chore / perf / style / ci / build), detects breaking changes and issue refs, summarizes large diffs with chunked map-reduce, generates a prepare-commit-msg hook snippet, validates output against the Conventional Commits spec, history (last 20), shareable URL. 100% client-side, no upload, optional BYO-key LLM.

AI Grammar Correction Tool

On-device, private grammar checker that catches subject-verb agreement, articles, tense, punctuation, capitalization, and common confusions (their/there/they're, your/you're, its/it's). Inline highlights by category, hover explanations, accept/dismiss, bulk accept-all-by-type, copy corrected text, diff view, readability score. Pure-JS rule engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI HTML Landing Page Generator

Generate a complete, responsive single-file HTML landing page from a prompt or structured inputs. Five templates (SaaS, App, Product, Event, Portfolio) with hero, features, testimonials, pricing, FAQ, and CTA sections. Inline CSS, SEO meta + Open Graph + FAQ schema baked in, dark-mode toggle, theme controls (colors, fonts, radius). Live preview, copy code, download .html. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Instagram Bio Generator

Generate scroll-stopping Instagram bios within the 150-character limit. Built-in template library for creator, business, personal, and brand account types — each variant comes with tasteful emojis, line breaks, a call-to-action (link in bio / DM / shop / book), relevant hashtag suggestions, and matching username/handle ideas. Live character counter with emoji-width handling, A/B bio pairs, searchable keyword optimization, tone presets (aesthetic, bold, minimal, playful, professional), niche presets, favorites (localStorage), history (last 20), and shareable URL. 100% client-side — optional BYO-key LLM enhancement.

AI Interview Question Generator

Generate role-specific interview questions with model answers, follow-up probes, and scoring rubrics. Built-in question library for developer, designer, product manager, sales, and marketing roles across behavioral, technical, situational, and culture-fit categories. Each question ships with a sample strong answer, follow-up probes, red-flag notes, and a 0-5 scoring rubric. Candidate practice mode grades your answer against the rubric, difficulty mix control, tech-stack tags, export to Markdown/JSON/CSV/text, saved question banks (localStorage), history (last 20), and shareable URL. 100% client-side — optional BYO-key LLM enhancement.

AI Jargon Simplifier

Turn dense technical, medical, legal, and financial text into plain English. Built-in jargon-to-plain dictionary (200+ terms across tech, medical, legal, financial domains), reading-level slider (grade 5–12/expert), inline glossary tooltips, locked tokens for figures/dates/citations, side-by-side diff, Flesch–Kincaid readability before/after, and history. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI JS Object to JSON Schema Converter

Convert a JS object or JSON sample into an inferred JSON Schema (Draft 7 or 2020-12). Recursive type inference for string, number, boolean, null, array, object; nested objects and arrays; format detection (email, date-time, uri, uuid); enum inference; multi-sample merging with anyOf; optional-fields handling; constraint inference (minLength/maxLength/minimum/maximum); validate JSON against the inferred schema; Markdown/JSON export; history (localStorage); shareable URL; optional BYO-key LLM descriptions. 100% client-side — your data never leaves the browser.

AI JSON Mock Data Generator

Generate realistic mock data from a JSON Schema or a plain-English field description. Pure-JS faker-style generators (names, emails, UUIDs v4, dates, addresses, phone numbers, URLs, lorem ipsum, numbers, booleans, enums, arrays, nested objects). Constraint-aware (min/max, minLength/maxLength, enum, format, pattern). Seeded PRNG for reproducible output. Export to JSON, CSV, or INSERT SQL. History (localStorage), shareable URL, optional BYO-key LLM to infer a schema from a natural-language description. 100% client-side — no row caps, no upload.

AI Keyword Extractor

Extract keywords and keyphrases from text using TF-IDF, RAKE, and YAKE algorithms. Multi-word keyword detection, scoring by frequency, position, capitalization, and co-occurrence. Top-N output with density bars, n-gram control (1–4), topic clustering, multi-language stopword packs, tag-cloud view, CSV/JSON export. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Kubernetes Manifest Generator — Secure Deployment YAML

Describe your app (name, image, port, replicas) and get production-ready Kubernetes manifests: Deployment, Service, Ingress, ConfigMap, Secret, Pod, Job, CronJob, and HPA — with resource limits, readiness/liveness probes, and non-root securityContext baked in. Per-field explanations, security lint (privileged, latest tag, missing limits), YAML validation, Kustomize/Helm output, import-to-edit, history (last 20), shareable URL, and optional BYO-key LLM polish. 100% client-side — nothing uploaded.

AI LinkedIn Bio Optimizer — Keyword-Rich Headlines & About

Paste your current profile or resume and get an optimized LinkedIn headline (within the 220-character limit) and About section (within 2,600 characters) — keyword-rich, recruiter-friendly, with a CTA. Score your profile section by section on keyword density, clarity, and impact. Generate 10+ headline and About variations across leadership / IC / creative / minimal / technical tones. Before/after diff, keyword gap list, character meters, history (last 20), and shareable URL. 100% client-side — optional BYO-key LLM enhancement.

AI Logical Fallacy Detector — Reasoning Aid

Detect informal logical fallacies in arguments, essays, debate transcripts. 23 fallacy patterns (ad hominem, strawman, slippery slope, false dichotomy, appeal to authority/emotion/popularity, red herring, tu quoque, no true scotsman, hasty generalization, post hoc, sunk cost, and more). Inline highlights, confidence per flag, plain-English explanations, steelman suggestion, encyclopedia with examples, sensitivity slider, history (localStorage), shareable URL. Pure-JS pattern engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Markdown README Generator — Private, No Repo Upload

Generate a professional README.md from project inputs or a pasted package.json. Five templates (open-source, npm package, library, CLI tool, web app). Section toggles + reorder, shields.io badge builder, license picker with full text, live Markdown preview, auto table of contents, emoji headings, screenshot placeholders, save projects locally, and import existing README to restructure. Pure-JS templater — optional BYO-key LLM polish. 100% client-side, nothing uploaded.

AI Markdown Table Generator — CSV/TSV/JSON to GFM Tables

Build GitHub-flavored Markdown tables from CSV, TSV, JSON, pasted spreadsheet data, or a manual grid. Alignment control (left/center/right), compact vs pretty mode, header detection, cell escaping, multi-row support, sort/transpose/dedupe, case transforms, line-break handling, HTML/CSV/JSON export, and round-trip import of existing Markdown tables. Pure-JS converter — optional BYO-key LLM polish. 100% client-side, nothing uploaded.

AI Math Word Problem Solver — Step-by-Step, Verified

Solve math word problems with step-by-step working and a verified final answer. Pattern-based classifier for arithmetic, algebra, geometry, percentage, ratio, rate, and mixture problems. Extracts numbers and operations from natural language, sets up the equation, computes the result with a deterministic math engine, and verifies the answer. Unit tracking, multiple methods, sample problems. Pure-JS solver — optional BYO-key LLM for hard problems. 100% client-side, nothing uploaded.

AI Meeting Minutes Summarizer

Paste a meeting transcript (or VTT/SRT) and get structured minutes: TL;DR, discussion summary, key decisions, action items with owners and due dates, attendees, open questions, and risks. Extractive summarization runs 100% client-side — nothing uploaded. Export Markdown, copy a recap email, and save to local history.

AI Mermaid.js Flowchart Generator

Describe a process in plain English ('A leads to B, B leads to C; if X then Y else Z') and get valid Mermaid flowchart code with decision diamonds, parallel paths, loops, and subgraphs — auto-fixed for common syntax errors and rendered live. Direction toggle (TD/LR), node shapes, theme styling, and SVG/PNG export via mermaid.live. 100% client-side — nothing uploaded.

AI Meta Tag Builder

Build SEO meta tags with live previews. Generate title, description, canonical, robots, Open Graph, Twitter Card, and JSON-LD snippets. Pixel-width and character meters, Google SERP / Facebook / X / LinkedIn / Slack / Discord previews, on-device AI drafting of titles and descriptions from page text, and copyable HTML — 100% client-side. Optional BYO-key LLM enhancement.

AI Multi-Language Translator

Translate text between 10 languages with a built-in 100+ phrase dictionary, translation memory, auto-detect, swap, batch mode, glossary, transliteration, and side-by-side output — 100% client-side. Optional BYO-key LLM for full-text neural translation. Nothing uploaded.

AI Newsletter Subject Line A/B Tester

Generate newsletter subject-line variants by angle (curiosity, urgency, benefit, personalization, question), transparently score each for open-rate potential (length, spam triggers, emoji, personalization, clarity), preview desktop/mobile truncation, lint spam risks, and compute a proper A/B test — sample size, split %, runtime, and two-proportion z-test for significance. Pure-JS template engine with optional BYO-key LLM. 100% client-side.

AI Nginx Config Rule Builder

Generate production-ready Nginx configs from a guided builder. Templates for static sites, PHP-FPM, Node reverse proxy, SPA, and WordPress — with SSL/TLS (modern ciphers), HTTP→HTTPS + www redirects, gzip, caching, rate limiting, security headers (HSTS/CSP), and load-balancing upstreams. Per-directive explanations and risk flags. Pure-JS template engine with optional BYO-key LLM. 100% client-side, no login, no upload.

AI Paragraph Summarizer

Summarize long articles, reports, notes, and transcripts into a short, faithful summary. Extractive summarization scores sentences by TF-IDF, position, and keyword presence. Adjustable length (short/medium/long), paragraph or bullet output, multi-paragraph support, map-reduce chunking for very long docs, key-points extraction, compression-ratio readout. 100% client-side — nothing uploaded. Optional BYO-key LLM hook for GPT-class quality.

AI Paraphrasing & Rewriter Tool

Rewrite text across six modes — Standard, Fluent, Formal, Casual, Concise, Expand — using on-device synonym substitution, sentence restructuring, and active↔passive voice change. Adjustable strength, per-sentence alternatives, preserve-terms list, side-by-side diff, readability delta, and multiple variations. 100% client-side — nothing uploaded. Optional BYO-key LLM hook for GPT-class quality.

AI Passive-Aggressive Email Translator

Decode passive-aggressive corporate emails into plain-English 'what they actually mean', with a 0–100 passive-aggression score, inline phrase highlighting, escalation meter, and a Defuse mode that rewrites your own angry drafts into Calm / Professional / Warm / Direct tones. Built-in glossary of 60+ classic corporate phrases ('per my last email', 'as I mentioned', 'going forward', 'gentle reminder', 'do the needful'). Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Passive→Active Voice Converter

Convert passive voice to active voice (and back) with inline clause highlighting, hidden-agent identification, per-sentence rewrites, and grammar explanations. Detects 'is written', 'was done', 'has been completed' and similar passive constructions, identifies the agent (or flags agentless passives), and preserves legitimate passives (unknown/irrelevant agent) instead of blindly rewriting. Sentence-level transformations with a passive-voice percentage meter, accept/reject per suggestion, and style-guide presets. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Podcast Episode Planner

Plan podcast episodes with segment outlines, timestamps, talking points, guest interview questions, ad-break placements, and publish-ready show notes. Pure-JS template engine for solo, interview, co-host, panel, and story formats — interview questions, ad spots, chapter markers, multiple title/description options, optional BYO-key LLM enhancement. 100% client-side — nothing uploaded.

AI Poem & Lyrics Writer

Write form-aware poems and song lyrics with rhyme, meter, mood, and theme control — haiku, sonnet, free verse, limerick, acrostic, plus verse/chorus/bridge song structure. Built-in 200+ word rhyme dictionary, syllable counter, rhyme-scheme validator (AABB/ABAB/ABBA/Free), acrostic from any word, song structure scaffolding, optional BYO-key LLM enhancement. 100% client-side — nothing uploaded.

AI Presentation Outline Generator

Generate slide-by-slide presentation outlines from a topic, audience, and goal. Six deck types (sales, training, conference, pitch, report, keynote) with narrative frameworks (problem-solution, hero's journey, pitch deck, lecture, report). Per-slide titles, bullets, speaker notes, and visual suggestions. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Press Release Draft Builder

Build AP-style press release drafts from your announcement details. Six release types (product launch, partnership, hiring, funding, event, award). Full structure: FOR IMMEDIATE RELEASE, headline, subhead, dateline, inverted-pyramid body, quote, boilerplate, ### end mark. Five headline angles, newsworthiness check, editable quote placeholders. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Product Description Writer

Write benefit-driven, SEO product descriptions from product name + features + audience + tone. Multi-format outputs (paragraph, Amazon 5-bullet, Shopify, Etsy, meta description), feature→benefit translator, SEO keyword density meter, multiple lengths (short/medium/long), persona targeting, A/B variants, bulk CSV mode. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Product Feature Prioritization Helper (RICE)

Score and rank your feature backlog using RICE (Reach × Impact × Confidence ÷ Effort) with an auto-ranked, sortable table. Also includes ICE, MoSCoW, and WSJF framework views, sensitivity analysis, CSV/Markdown export, and an optional AI-assist that drafts R/I/C/E scores from a feature description. Pure-JS scoring engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Prompt Improver

Rewrite weak one-line prompts into structured, model-ready prompts. Analyzes clarity, specificity, context, constraints, format, and examples. Adds role framing, explicit task, context slots, constraints, and output format. Scores 0-100 with tips. Target-model presets (GPT-4, Claude, Gemini, local). Variable extraction + reusable template. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Recipe Generator

Generate recipes from ingredients in your fridge. Built-in 50+ recipe database with diet (vegan, gluten-free, keto, halal), allergy, cuisine, time, and servings filters. Match recipes by available ingredients, generate variations, scale portions live, estimate nutrition, toggle metric/imperial units, export a shopping list. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Reddit Post Title Optimizer

Generate subreddit-aware, non-clickbait Reddit post titles from your draft. Five title formulas (question, story, list, controversy, AMA), per-subreddit char limits, authenticity + clickbait-risk scoring, rule-risk flags, A/B pairs, copy per title. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Regex Builder

Build a regular expression from plain English. Pattern library (email, phone, URL, IP, date, time, credit card, hex color, ZIP, UUID), NL → regex matcher, live test against sample text with highlights, token-by-token AST explanation, multi-flavor conversion (JS/PCRE/Python/Java), ReDoS warnings, capture-group table, replace preview, code snippet export. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Resume Bullet Point Optimizer

Rewrite weak resume bullets into quantified, action-verb-led, ATS-friendly achievement statements. Bullet formula (Action verb + Task + Result + Metric), weak-phrase detector ('responsible for', 'worked on'), passive-voice flag, strong verb alternatives, JD keyword match + gap highlight, per-bullet strength score, STAR framing, tense check, bulk optimize, copy/export. Pure-JS engine — optional BYO-key LLM. 100% client-side, PII never leaves the browser.

AI robots.txt Custom Rule Builder

Build a valid, tested robots.txt from plain-language intent or a visual rule builder. Per-user-agent allow/disallow, crawl-delay, sitemap references, and modern AI-crawler control (GPTBot, Google-Extended, CCBot, PerplexityBot, ClaudeBot, Bytespider). Sample-URL tester implementing the Robots Exclusion Protocol, NL intent parser, AI-crawler presets, 'Block all AI training crawlers' one-click, multiple sitemaps, comment annotations, .robots.txt import-to-edit, and honest warnings about unsupported directives (noindex, crawl-delay). Pure-JS + optional BYO-key LLM. 100% client-side, no login, no upload.

AI Salary Negotiation Script Writer

Generate tailored salary-negotiation scripts: a counter-offer email, in-person talking points, responses to common objections (budget fixed, what are your expectations, more experience needed), and non-salary levers (equity, PTO, remote, signing bonus). Three scenarios — initial ask, counter-offer, final offer — with confident or collaborative tone, anchor-range guidance, leverage framing, and a role-play practice mode. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Sentiment Analysis Tool

On-device sentiment analysis: paste any text (reviews, tweets, feedback, emails) and get a positive / negative / neutral label, a -1 to +1 score, per-sentence breakdowns, emotion detection (joy, anger, sadness, fear, surprise, disgust, trust, anticipation), aspect-based sentiment, confidence scores, and bulk CSV analysis with a summary chart. Built-in 200+ word lexicon with negation handling. Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Shell & Bash Script Writer

Write safe, commented Bash/shell scripts from plain English. Generates shebang, strict-mode (set -euo pipefail), arg parsing, usage block, error handling, and per-section comments. shellcheck-style lint flags unquoted vars, eval, cd-without-check, and destructive commands (rm -rf, dd, mkfs). POSIX vs Bash toggle, cron-ready wrapper, dry-run guard, explain-existing-script mode, copy/download, history (localStorage), shareable URL, optional BYO-key LLM. 100% client-side — nothing uploaded.

AI Slogan & Tagline Generator

Generate catchy slogans and taglines from brand + keywords across styles (benefit, emotional, witty, rhyming, minimalist, imperative). 100+ power words, alliteration/rhyme detection, cliché filter, length control, and a deterministic scorer (memorability, length, impact). A/B pairs, style chips, favorites, history (localStorage), shareable URL, optional BYO-key LLM. 100% client-side — nothing uploaded.

AI Social Media Caption Writer

Write per-platform social media captions for Instagram, X/Twitter, LinkedIn, TikTok, and Facebook. Built-in template engine produces hook + body + CTA + hashtags + emojis with each platform's char-limit, hashtag, and style conventions. Tone presets, emoji density slider, hook variants, CTA library, niche + branded hashtag suggestions with shadowban-risk flagging, hashtag-in-first-comment tip, A/B caption pairs, thread/carousel mode, multi-language ready, history (last 20), favorites (localStorage), and shareable URL. 100% client-side — optional BYO-key LLM enhancement.

AI SQL Query Generator

Generate SQL from a natural-language question plus your table schema. Schema parser (CREATE TABLE DDL or comma-separated table.col list), NL → SQL pattern matching (SELECT, WHERE, JOIN, GROUP BY, ORDER BY, HAVING), dialect selection (SQLite/PostgreSQL/MySQL), SELECT-only safety guard, syntax validation, query explanation, parameterization helper, EXPLAIN hint, dialect convert, history. Pure-JS engine — optional BYO-key LLM. 100% client-side, schema never uploaded.

AI Study Guide Generator

Transform notes or a textbook chapter into a structured study guide: overview, learning objectives, key terms with definitions, concept explanations, worked examples, and self-test questions (MCQ + short answer) with answers. Four output formats — outline, Q&A, summary sheet, and flashcards. Adjustable reading level (elementary → college) and depth (quick → comprehensive). Extractive summarization, key-term extraction via TF-style scoring, concept map outline, and spaced-repetition-ready export. History (last 20), favorites (localStorage), and shareable URL. 100% client-side — optional BYO-key LLM enhancement.

AI SVG Vector Art Generator

Generate clean, editable SVG vector art from a text prompt. Pure-JS parametric generator with five template families (geometric, mandala, pattern, landscape, icon), seeded randomization for reproducibility, color palette presets + custom colors, complexity control, live preview, built-in SVG optimizer + validator, and PNG / React-component export. Optional BYO-key LLM hook for richer art — key stays 100% client-side. 100% offline.

AI SWOT Analysis Creator

Generate a structured SWOT analysis (Strengths, Weaknesses, Opportunities, Threats) plus TOWS-derived strategy actions (SO/ST/WO/WT) from a business, product, project, or career description. 14 industry templates with concrete starter bullets, keyword-based enrichment from your description, editable quadrants, per-quadrant regeneration, prioritization scoring (impact × feasibility), and Markdown / JSON / HTML matrix export. Optional BYO-key LLM hook for depth — key stays 100% client-side. 100% offline.

AI Tailwind CSS Palette Generator

Generate a full Tailwind 50–950 color scale from one base hex/HSL, with perceptually-even OKLCH-style shading, color-harmony helpers (complementary, analogous, triadic, monochrome), WCAG contrast checks per shade pair, and copy-ready tailwind.config (v3 + v4) + CSS variables + JSON tokens. Brand + neutral + status set, presets, palette lock + randomize, save locally. 100% client-side — optional BYO-key LLM polish. Nothing uploaded.

AI Target Audience Demographics Profiler

Profile your target audience with a complete ICP + persona: demographics, psychographics, goals, pains, channels, messaging angles, objections, buying triggers, and a named day-in-the-life. Built-in audience template library by product category (B2B SaaS, consumer app, e-commerce, marketplace, media, dev tool, education, healthcare, finance, etc.). Multiple segments + ICP scoring. Export persona card + ICP checklist as Markdown/JSON. 100% client-side — optional BYO-key LLM polish. Nothing uploaded.

AI Tech Stack Recommender

Get an opinionated, transparent tech-stack recommendation (frontend, backend, DB, hosting, auth) from a guided questionnaire: product type, team skills, timeline, scale, budget, compliance. Weighted scorecard with adjustable weights, per-pick rationale, alternatives ('pick this instead if…'), cost estimate ranges, and Markdown ADR export. Pure-JS rule engine + optional BYO-key LLM. 100% client-side, no login, no upload.

AI Text Simplifier (ELI5)

Simplify complex text to ELI5 (Explain Like I'm 5), grade-school, teen, or plain-professional reading levels. Pure-JS engine: jargon detector with inline plain-English glosses, sentence splitter for long sentences, synonym substitution toward grade-school vocabulary, Flesch–Kincaid reading-ease and grade-level before/after scores, preserve-exactly locks for numbers/dates/citations, side-by-side diff, history, share URL. Optional BYO-key LLM — key stays 100% client-side. 100% offline, nothing uploaded.

AI Text-Based Adventure Game Engine

Play or build a choose-your-own-adventure text RPG. Four genre templates (fantasy, sci-fi, mystery, horror) with branching scenes, inventory, health, score, quest flags, save/load (localStorage), transcript export, dice/skill checks, and free-text actions. Pure-JS engine — optional BYO-key LLM for richer narration. 100% client-side, nothing uploaded.

AI Text-to-Image Prompt Builder

Build optimized image-generation prompts for DALL·E 3, Stable Diffusion, and Midjourney from a single description. Pure-JS prompt engineer: 12 style presets, 6 aspect ratios, lighting & mood libraries, weighted-keyword tokenizer for SD, Midjourney parameter generator (--ar, --v, --stylize, --seed), negative-prompt builder, token count estimator, prompt validator, and seed reproducibility. Optional BYO-key OpenAI image API call — key stays 100% client-side. No images are generated without your own key; everything else runs on-device.

AI Thesis Statement Generator

Generate strong, arguable thesis statements from a topic, stance, and essay type. Four essay types (argumentative, analytical, expository, compare-contrast) with 5+ thesis variations per input, supporting-point scaffolds, counter-argument prompts, and rubric-based strength scores (clarity, specificity, arguability). Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Travel Itinerary Planner

Plan day-by-day travel itineraries from destination, duration, pace, budget, and interests. Five trip-type templates (city break, beach, adventure, cultural, foodie) with realistic timing, travel-gap awareness, opening-hours notes, restaurants, map-ready stops, .ics calendar export, Markdown export, pace slider, day regenerate, multi-city support, and history (localStorage). Pure-JS engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI TypeScript Interface Generator

Generate TypeScript interfaces from JSON samples. Pure-JS recursive type inference — nested objects extracted into separate interfaces, optional & nullable handling, union types, enum (string-literal) detection, multi-sample merging for accurate optional fields, runtime type guards, and JSDoc from keys. Configurable root name, interface vs type, export, readonly, optional style, and array style. Optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Unit Test Case Generator

Generate unit test suites from pasted code. Parses function signatures and writes happy-path, edge-case, error-case, parameterized, snapshot, and mock-scaffolded tests using Arrange-Act-Assert. Supports Jest, Vitest, PyTest, and JUnit for JavaScript, TypeScript, Python, and Java. Coverage-gap hints, setup/teardown scaffolding, copy/download, history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement — your code never leaves the browser unless you choose to call your own provider.

AI User Persona Creator

Generate distinct, structured UX personas from a product description and audience notes. Each persona gets demographics, goals, pains, behaviors, motivations, frustrations, preferred channels, a quote, a day-in-the-life, an empathy map (says/thinks/does/feels), and jobs-to-be-done framing. Multiple persona variants (2-4) with bias-aware, confidence-flagged output. Export to Markdown, copy, download, history (localStorage, last 20), and shareable URL. 100% client-side. Optional BYO-key LLM enhancement — your product and research notes never leave the browser unless you choose to call your own provider.

AI User Story Creator (Agile/Scrum)

Generate Agile/Scrum user stories from a feature or epic. Standard 'As a / I want / so that' format, Given/When/Then (Gherkin) acceptance criteria, INVEST validation, story-point estimates (Fibonacci / T-shirt / powers-of-2), edge cases, epic → story → task breakdown, definition-of-done checklist, and Jira/Azure/CSV/Markdown export. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Video Script Outliner

Generate platform-specific video script outlines for YouTube long-form, Shorts/Reels, TikTok, and explainer videos. Scroll-stopping hook variants, scene-by-scene beats with timestamps, on-screen text and B-roll cues, retention-curve tips, CTAs, word-count ↔ duration estimates, teleprompter export, long-form → Shorts repurposing, and series planning. Pure-JS template engine — optional BYO-key LLM. 100% client-side, nothing uploaded.

AI Website Sitemap Generator

Generate website sitemaps by site type (blog, e-commerce, SaaS, portfolio, docs). Paste your URLs or use a built-in template, then export a valid XML sitemap (with priority/changefreq/lastmod), an HTML sitemap, and a visual tree. Auto-split into a sitemap index at 50k URLs, image + hreflang (multilingual) entries, exclude patterns, per-URL overrides. Pure-JS engine — optional BYO-key LLM. 100% client-side, no page cap, no upload.

AI Weekly Meal Planner

Plan a full week of meals (breakfast, lunch, dinner, snack per day) from a built-in 50+ recipe database. Diet filters (vegan, vegetarian, keto, gluten-free, dairy-free, nut-free, halal), allergy exclusions, cuisine variety, max cook time, household size, budget, and calorie/macro targets. Auto-builds a consolidated grocery list grouped by aisle with smart ingredient-overlap to cut waste, plus one-tap meal swaps and pantry-aware planning. Pure-JS engine — optional BYO-key LLM. 100% client-side, no subscription, no upload.

AI Workout Planner

Build a personalized, progressive weekly workout plan from goal (strength, muscle gain, fat loss, cardio, flexibility, general fitness), experience level, available equipment, days/week, and session length. Pure-JS engine picks exercises from a 40+ movement library, assigns sets/reps/RIR/rest with weekly progression, equipment-aware swaps, warm-up/cool-down, deload weeks, and split options (full-body / PPL / upper-lower). Local workout logger drives auto-progression. Optional BYO-key LLM. 100% client-side, no subscription, no upload.

Anagram Solver

Unscramble letters to find valid words with dictionary lookup and scoring. 100% private. 100% private.

Anchor Text Distribution Analyzer

Analyze anchor text distribution from backlink data. Categorize anchors as exact/partial match, branded, generic, naked URL, or image. Compute distribution %, warn on over-optimization, and export. 100% client-side.

Anchor Text Optimizer

Analyze and optimize anchor text distribution for SEO. Detect over-optimization, branded vs exact-match ratios.

Annuity Calculator

Calculate annuity present value, future value, and payout with custom terms. 100% private. 100% private.

ANSI Escape Code / Terminal Color Generator

Visually compose terminal text styling — FG/BG color in 16/256/24-bit truecolor, SGR styles (bold, faint, italic, underline, blink, inverse, hidden, strikethrough) — and get the exact ANSI escape sequence with a live preview. Multi-format escape output (\x1b, \033, \e, \u001b, raw ESC), language snippets (bash printf, Python, JS, Go, Rust, C), reverse decoder (paste a sequence → see what it does), hex→256 and hex→truecolor conversion, 256-color palette grid, strip-ANSI helper, terminal-support notes. 100% client-side.

Antonym Finder

Find antonyms for words with sense-aware matching and custom word lists. 100% private. 100% private.

Apache .htaccess Generator

Generate Apache .htaccess rules. Redirects, rewrites, auth, caching, security headers.

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API Authentication Header Builder

Build API authentication headers: Bearer token, Basic Auth, API Key, HMAC, AWS Signature v4.

API Authentication Header Builder

Build API authentication headers: Bearer, Basic, API Key, HMAC, AWS Sig v4.

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APK Extractor

Extract and inspect Android APK files in the browser — pure JavaScript APK (ZIP) parser. View AndroidManifest.xml (binary XML detection), list DEX files, resources, and assets, extract individual files, detect app info (package name, version) from manifest. 100% client-side.

APNG Maker

Create Animated PNG (APNG) files from multiple PNG frames. Frame delay, loop count, optimization.

App Icon Generator

Generate iOS/Android app icons in all required sizes from one source. 100% private. 100% private.

App Icon Generator (iOS/Android)

Generate app icons for iOS and Android from a single source image. All required sizes in one click.

App Icon Generator (iOS/Android)

Generate app icons for iOS and Android from a single source image. All required sizes.

Area Converter

Convert between m², km², ft², acre, hectare, mi² with all-units table. 100% private. 100% private.

Argon2 Hash Generator

Argon2id/2d/2i parameter calculator + verifier. PHC parser. OWASP presets. PBKDF2 fallback.

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Argon2 Parameter Calculator

Calculate Argon2 parameters (memory, iterations, parallelism) per OWASP RFC 9106. 100% private. 100% private.

ARJ Extractor

Inspect ARJ archives. Detects the ARJ magic (0x60 0xEA), parses header structures, lists file entries with sizes and CRCs, and extracts STORE-method files when possible. Honest about ARJ compression limitations. 100% client-side.

ARR Calculator

Calculate Annual Recurring Revenue from MRR, churn, and growth. 100% private. 100% private.

Arrow Function Converter

Convert JS function expressions to arrow functions and vice versa. Detects this/arguments/super/yield.

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ASCII / Unicode Code Point Explorer (UTF-8/16/32, HTML/CSS/JS Escapes)

Browse ASCII (0–127) and any Unicode code point: see the character, decimal, hex, binary, HTML entity (decimal & hex), URL percent-encoding, CSS escape, JS escape, plus the full UTF-8 / UTF-16 / UTF-32 byte encodings. Search by name, code point, or literal character, and explore every Unicode block. Decompose pasted strings code-point-by-code-point. 100% client-side & offline.

ASCII Art Generator

Convert images and text into ASCII art — image-to-ASCII with 5 dithering engines, text-to-ASCII with 60+ FIGlet fonts, plus webcam mode and TXT/PNG/SVG/HTML/ANSI/PDF export, all in your browser.

ASCII Art Text Banner Generator

Convert text into ASCII art banners using 10+ bundled font styles (block, banner, standard, big, small, shadow, slant, digital, thin, thick, mini, letters). Each font is hand-tuned with uppercase A–Z, digits 0–9, space, and common punctuation. Choose a character set (hash, block, slash, dot), set a custom output width with line wrapping, flip horizontally or vertically, copy as monospaced text, wrap as Markdown code block or HTML <pre>, and download as .txt or HTML. 100% client-side.

Aspect Ratio Crop Presets

Crop images to common aspect ratios (16:9, 4:3, 1:1, 9:16, etc.) with visual crop overlay.

Assignment Rubric Maker

Create detailed assignment rubrics with criteria, levels, and point allocation. 100% private. 100% private.

AST Explorer (JS/TS)

Explore Abstract Syntax Trees of JavaScript/TypeScript code. Parse, traverse, inspect nodes.

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Atbash Cipher

Encode/decode Atbash cipher (a↔z, A↔Z). Latin, Hebrew, Greek, Cyrillic alphabets. Self-inverse.

DeveloperComing Soon

Audio Bitrate Calculator

Calculate audio bitrate, file size, duration, and quality metrics entirely in the browser. Supports PCM/WAV, FLAC, ALAC, MP3, AAC, OGG/Vorbis, and Opus. Compute bitrate from sample rate × bit depth × channels (PCM), estimate FLAC/ALAC compression (50–60% of PCM), map lossy quality presets (low/medium/high/voice/music) to typical bitrates, compute file size from bitrate × duration, calculate streaming bandwidth requirement, reverse-calculate required bitrate from target file size, and score quality 0–100. Includes 7 sample rates, 5 bit depths, 4 channel layouts, 7 formats, 5 quality presets, side-by-side format comparison, text/CSV exports, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Converter

Convert audio files between formats entirely in the browser. Decode with Web Audio API, re-encode to WAV (PCM 16-bit), WebM/OGG (via MediaRecorder), or MP3 (via MediaRecorder with WAV fallback). Multi-format output, 4 bitrate presets, 6 sample-rate presets, mono/stereo channel selection, pure-JS 44-byte RIFF WAV header builder, Float32 to 16-bit PCM converter, file-size estimator, quality score calculator (0-100), lossless-vs-lossy compatibility checker, smart filename generator, conversion history (localStorage), shareable URL, drag-and-drop, and summary stats. 100% client-side.

Audio Converter Reference

Reference for audio format conversion: MP3/WAV/AAC/OGG/FLAC/Opus with quality settings. 100% private. 100% private.

Audio Equalizer

Apply a 10-band graphic EQ to audio entirely in the browser. Drag-and-drop or pick a file, decode with Web Audio API, adjust the gain (-12 dB to +12 dB) on each ISO-standard band (31, 62, 125, 250, 500, 1k, 2k, 4k, 8k, 16k Hz), apply via a chain of peaking BiquadFilterNodes in an OfflineAudioContext for batch processing, and re-encode as a 16-bit PCM WAV (pure-JS encoder). 10+ preset library (flat, bass-boost, treble-boost, vocal-boost, loudness, rock, pop, jazz, classical, podcast), 3-band & 5-band simplified modes, 7 gain presets per band, default Q factor 1.41, gain validator, filter-chain config builder, file-size estimator, text + CSV report, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Equalizer Reference

Reference for EQ bands, frequencies, Q-factor, and common presets. 100% private. 100% private.

Audio Fade Generator

Apply professional fade in / fade out to audio files entirely in the browser. Drag-and-drop or pick a file, decode with Web Audio API, choose a fade curve (linear, logarithmic, exponential, or S-curve), set fade in / fade out durations (6 presets from 100 ms to 5 s), and re-encode as a 16-bit PCM WAV (pure-JS encoder — no library). Fade gain array generator, per-sample fade applier, fade duration validator, sample-range calculator, ASCII curve visualizer, audio preview before/after, history (localStorage), shareable URL, and summary stats. 100% client-side.

Audio Format Detector

Detect audio file format from magic bytes entirely in the browser. Drag-and-drop a file, we read the first 64 bytes and match against 15+ audio format signatures (MP3 ID3/frame-sync, WAV, FLAC, OGG, M4A/AAC, WMA, AIFF, ALAC, OPUS, APE, TTA, WavPack, Speex, AMR, 3GP). Extracts sample rate, channels, bit depth, duration from headers. Includes MIME lookup, file extension lookup, container info (lossless/lossy), bit-depth & channel-layout tables, format comparison table, closest-match suggestion for unknown formats, confidence score, text/CSV/JSON exports, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Format Reference

Reference for audio formats (MP3, AAC, FLAC, WAV, OGG, Opus). 100% private. 100% private.

Audio LUFS Reference

Reference for LUFS levels, true peak, and loudness standards (EBU R128, ATSC A/85). 100% private. 100% private.

Audio Merger

Merge multiple audio files into one continuous file entirely in the browser. Drag-and-drop an ordered list, decode each via Web Audio API, auto-unify sample rate and channel count, then concatenate with optional silence gap (6 presets) or linear crossfade (6 presets). Re-encode as 16-bit PCM WAV (pure-JS RIFF encoder — no library). Sample-rate unifier, channel upmixer, linear resampler, silence gap generator, crossfade calculator + applier, buffer concatenator, total-duration calculator, file-size estimator, timestamped filename, history (localStorage), shareable URL, summary stats, drag-and-drop + segment reordering. 100% client-side.

Audio Metadata Editor

View and edit audio file metadata entirely in the browser — ID3v2 tags for MP3, Vorbis comments for OGG / FLAC, and RIFF INFO for WAV. Drag-and-drop a file, auto-detect the format by magic bytes, parse existing fields (title, artist, album, year, track, genre, comment, copyright), edit values, and write them back. ID3v2 (MP3) and RIFF INFO (WAV) support full read + write; OGG / FLAC Vorbis comments are read-only. Includes 126 ID3v1 genre presets (Blues, Classic Rock, …, Dance Hall), case-insensitive field normalization, field length validation, text + CSV report exporters, history (localStorage), shareable URL, and summary stats. 100% client-side — no upload, no library.

Audio Noise Floor Reference

Reference for noise floor levels, dBFS scales, and SNR calculations. 100% private. 100% private.

Audio Noise Reducer

Reduce background noise from audio in the browser using spectral subtraction and a noise gate. Drag-and-drop or pick a file, decode with Web Audio API, estimate the noise floor from a leading silent region, subtract the average noise spectrum from each FFT window, and silence samples below a dBFS threshold. Then re-encode as a 16-bit PCM WAV (pure-JS encoder). 4 strength presets (light/medium/strong/aggressive), 4 noise-gate presets (-30/-40/-50/-60 dBFS), 5 FFT sizes, hanning windowing, magnitude/phase separation, IFFT reconstruction, file-size estimator, text + CSV report, history (localStorage), shareable URL, summary stats (input level, noise level, output level, % noise reduced). 100% client-side.

Audio Recorder

Record audio from your microphone entirely in the browser with MediaRecorder. Multi-format support (webm/ogg/mp3), 4 bitrate presets, max-duration limit, pause/resume, live MM:SS.ms timer, file-size estimator, timestamped filename, in-page audio preview, recording history (localStorage), shareable URL settings, format support detection, permission error handler, and summary stats. 100% client-side.

Audio Reverb Reference

Reference for reverb types, decay times, pre-delay, and room sizes. 100% private. 100% private.

Audio Reverser

Reverse audio playback — flip the sample buffer end-to-start entirely in the browser. Drag-and-drop or pick a file, decode with Web Audio API, choose a reverse mode (full buffer / per-channel / segment-based / interleaved-stereo), apply click-preventing fade in/out at boundaries, and re-encode as a 16-bit PCM WAV. Pure-JS reverse + zero-crossing click detector, segment presets (1/2/4/8/16 segments), time & file-size estimator, audio preview before/after, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Spectrum Analyzer

Analyze audio frequency spectrum entirely in the browser. Drag-and-drop or pick an audio file, decode with Web Audio API, choose FFT size (6 presets: 256/512/1024/2048/4096/8192) and window function (4 presets: hanning/hamming/blackman/rectangular), render a real-time spectrum on Canvas, find peak frequencies, compute energy in 7 standard frequency bands (sub-bass, bass, low-mid, mid, high-mid, presence, brilliance), dBFS conversion, magnitude calculator, exponential smoothing, 4 color palette presets, text report, CSV export, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Speed Changer

Change audio playback speed (0.25× to 4.0×) with optional pitch preservation. Drag-and-drop or pick a file, decode with Web Audio API, choose a speed preset (7 from 0.5× to 2.0×) or enter a custom factor, toggle pitch preservation (uses OfflineAudioContext resampling to keep pitch when speed changes), and re-encode as a 16-bit PCM WAV. Pure-JS linear-interpolation resampler, pitch-shift (semitone) calculator, duration & file-size estimator, click-preventing fade in/out, audio preview before/after, history (localStorage), shareable URL, summary stats. 100% client-side.

Audio Splitter

Split an audio file into multiple segments entirely in the browser. Drag-and-drop a file, decode with Web Audio API, and split using one of three modes: equal-count (split into N parts), equal-duration (parts of X seconds each), silence detection (auto-detect quiet regions using dB threshold + min-duration presets), or manual timestamps. Each segment is re-encoded as a 16-bit PCM WAV (pure-JS RIFF encoder) and bundled into a pure-JS ZIP archive (STORE method, no library). Per-segment download links plus a single ZIP download. History (localStorage), shareable URL, summary stats. 100% client-side.

Audio Trimmer

Trim audio files to a start/end range entirely in the browser. Drag-and-drop or pick a file, decode with Web Audio API, set start/end timestamps (MM:SS.ms, HH:MM:SS, or seconds), apply fade in/out (5 presets), and re-encode as a 16-bit PCM WAV (pure-JS encoder — no library). Multi-format time parser, sample-range calculator, 44-byte RIFF WAV header builder, file-size estimator, trim validation, crossfade calculator, audio preview before/after, history (localStorage), shareable URL, summary stats (original duration, trimmed duration, % removed, output size). 100% client-side.

Audio Trimmer Reference

Reference for audio trimming: time selection, fade in/out, format export. 100% private. 100% private.

Audio Volume Normalizer

Normalize audio volume to a target dBFS — boost quiet audio and reduce loud audio to a consistent level. Three normalization modes (peak, RMS, simplified loudness), 8 dBFS presets including EBU R128 standard (-23 LUFS), dBFS ↔ linear gain converter, peak detector, RMS calculator, clipping detector, auto clipping preventer, sample scaler, pure-JS WAV encoder, text report generator, conversion history (localStorage), shareable URL, drag-and-drop, and summary stats. 100% client-side.

Audio Waveform Viewer

Visualize audio waveforms entirely in the browser. Drag-and-drop or pick an audio file, decode with Web Audio API, render peak/RMS waveform on Canvas with zoom (6 presets: 1x/2x/5x/10x/50x/100x), select channel view (left/right/both/mono-mix), detect silence regions (5 threshold presets from -30dB to -80dB, 5 min-duration presets from 100ms to 2s), find top-N amplitude peaks, 5 color presets (blue/green/red/purple/mono), peak list renderer, text report, CSV export (peaks + silence), history (localStorage), shareable URL, summary stats (duration, sample rate, channels, peak count, silence count, % silence). 100% client-side.

Audiobook Player Reference

Reference for audiobook features: speed, bookmarks, chapter navigation. 100% private. 100% private.

Audiogram Podcast Clip Maker

Create audiogram waveforms for podcast clips with customization. 100% private. 100% private.

Auto-Redact by Pattern (Regex PII)

Redact PDF content matching regex patterns. Custom PII patterns, bulk.

Auto-Redact by Pattern (Regex PII)

Redact PDF content matching regex patterns. Custom PII patterns, bulk.

Auto-Rotate PDF (by Text Orientation)

Automatically rotate PDF pages based on text orientation. OCR-based.

Auto-Rotate PDF (by Text Orientation)

Automatically rotate PDF pages based on text orientation. OCR-based.

Autoprefixer Tool

Add vendor prefixes to CSS based on caniuse-like rules. ~30-property database. Browserslist presets.

DeveloperComing Soon

AVL Tree Visualizer

Step-by-step visualization of self-balancing AVL tree operations — insert, delete, search, and in-order traversal — with live per-node balance factor badges, automatic imbalance detection, and the four rotations (LL, RR, LR, RL) animated as labeled steps. Double rotations (LR / RL) are split into their two single-rotation phases so you can follow each move. Side-by-side height comparison vs a plain BST on identical input, rotation-count statistics, cascading deletion rebalance, bulk insert, and shareable tree-state URLs. 100% client-side.

awk Command Builder & Tester

Build and test awk one-liners in the browser. A pure-JavaScript awk interpreter (no WASM, no network) runs BEGIN/END blocks, pattern { action } rules, field separators (-F / FS), -v variables, $0/$1/$N, NR/NF, OFS, print/printf, if/while/for, length/tolower/toupper/substr/split, regex patterns, arithmetic, comparisons, and string concatenation. Visual builder (pick columns, add a condition, choose an aggregation → generates the program), per-option plain-English explanation, reverse program explainer, sample-data library, recipe presets, GNU vs POSIX toggle, copy-ready `awk -F',' '{print $1,$3}' file` command, history (max 20), shareable URL. 100% client-side.

Azw3 To Pdf Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

Backlink Gap Analyzer

Find backlinks your competitors have but you don't. Multi-competitor support (up to 3), gap detection, opportunity scoring, shared backlinks, top opportunities sorted by DA, export CSV, history (localStorage), shareable URL. 100% client-side.

Backlink Profile Analyzer

Analyze imported backlink data (CSV/JSON). Total backlinks, unique domains, anchor distribution, dofollow/nofollow ratio, link-type distribution, top referring domains, top anchor texts, toxic link flagging (low DA), CSV/JSON import, report export, history, shareable URL. 100% client-side.

Backlink Quality & Toxicity Scorer

Score backlinks for quality and toxicity from imported data. Quality score 0-100, toxicity flag (spam score, low DA, exact-match anchor), categorize (good/suspicious/toxic), stats per category, top toxic links, DA distribution, bulk import, CSV export, history (localStorage), shareable URL. 100% client-side.

Barcode Generator

Generate scannable 1D/linear barcodes (Code128, EAN-13, UPC-A, ITF-14, GS1-128, Codabar, MSI, Pharmacode) with live preview, PNG/SVG/PDF export, bulk CSV batches, label sheets, and a camera scan-test — fully in-browser.

Base32 Encode/Decode

RFC 4648 Base32 encoding/decoding (standard, base32hex, Crockford). UTF-8 safe.

DeveloperComing Soon

Base32 Encoder/Decoder

Encode and decode Base32 strings. 100% private. 100% private.

Base58 Encode/Decode

Bitcoin/Ripple/Flickr Base58 encoding with Base58Check checksum support. UTF-8 safe.

DeveloperComing Soon

Base58 Encoder/Decoder

Encode and decode Base58 (Bitcoin-style) strings. 100% private. 100% private.

Base64 Decode to Image

Decode Base64 string to image file. Auto-detect format, preview, download.

DeveloperComing Soon

Base64 Encode/Decode

Standard/URL-safe/MIME Base64. UTF-8 safe. File support. 100% client-side.

DeveloperComing Soon

Base64 Encoder / Decoder

Encode text or files to Base64, or decode Base64 back to text — UTF-8 safe, with URL-safe variant and live byte counter. 100% private.

Base64 File Decoder

Decode Base64 or data URL back into a binary file. Handles URL-safe, line-wrapped, and padded Base64. MIME detection, magic bytes verification, hex preview, custom filenames, batch decode. 100% client-side.

Base64 File Encoder

Convert any file to Base64 or a data URL. URL-safe Base64, line-wrapped output (76 chars), batch encoding, MIME detection, size warnings, copy/download. 100% client-side.

Base64 Image Encode/Decode

Encode image files (PNG, JPG, WebP, GIF, SVG) to Base64 data URLs. Decode back. Live preview.

DeveloperComing Soon

Base64 to Hex Converter

Bidirectional Base64 ↔ Hex conversion. Content-shape detection. UTF-8 safe.

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Base64 to Image

Convert a Base64 data URL back into a downloadable image file. 100% private — runs entirely in your browser.

Base64 to Image Decoder

Decode Base64 data URLs back to image files. Supports PNG, JPG, WebP, GIF, SVG. Live preview.

Base85 Encoder/Decoder

Encode and decode Base85 (Ascii85) strings. 100% private. 100% private.

Bash Prompt (PS1) Generator

Build your Bash or Zsh prompt visually — drag username, hostname, cwd, git branch, time, exit-code, and prompt-symbol elements, set per-element FG/BG color in 16/256/truecolor, and copy the ready-to-paste PS1 (or Zsh PROMPT) with proper \[ \] non-printing wrappers. Includes bundled parse_git_branch helper, two-line prompts, RPROMPT, PS2/PS3/PS4, title-bar escape, Nerd Font glyphs, live preview, presets, history (localStorage), and shareable URL. 100% client-side.

Bash Script Generator / Boilerplate

Generate a hardened, shellcheck-clean Bash script skeleton from a few choices: shebang, strict mode (set -euo pipefail), getopts/long-option flag parser with auto-generated usage() and --help, EXIT/ERR/INT traps with temp-dir cleanup, logging helpers (info/warn/error to stderr with optional colors), dependency-check, dry-run scaffolding, root-required check, OS detection, and positional argument validation. Five presets: file ops, system info, backup, deployment, monitoring. Copy/download .sh, shareable URL. 100% client-side.

Basic Grammar Checker

Check basic grammar rules: capitalization, double spaces, common misspellings. 100% private. 100% private.

Bates Numbering (Legal)

Add Bates numbers to PDF for legal document indexing. Custom format.

Bates Numbering Tool

Add Bates numbering to PDF pages with custom format, position, and prefix. 100% private. 100% private.

Bcrypt & PBKDF2 Hash Generator

Generate and verify bcrypt + PBKDF2-SHA256 password hashes. Adjustable cost factor, batch verify, hash format detection, crack-time estimate, password strength check, hash comparison, and CSV export. 100% private.

Bcrypt Generator/Verifier

Generate and verify bcrypt password hashes. Cost 4-31. $2a/$2b/$2y prefix. Bulk verify.

DeveloperComing Soon

Bibliography & Citation Generator

Generate citations in APA, MLA, Chicago, Harvard styles with DOI lookup. 100% private. 100% private.

Bibliography Generator

Generate bibliography entries in APA, MLA, Chicago, Harvard styles. 100% private. 100% private.

Big Integer Arbitrary-Precision Calculator

Evaluate arbitrary-precision integer arithmetic with native BigInt: +, -, *, /, %, **, GCD, LCM, factorial, Fibonacci, modular exponentiation (a^b mod m), Miller-Rabin primality test, base conversion (binary/octal/decimal/hex/base-N up to 36), exact rational mode (fractions kept exact, not floated), and a full shunting-yard expression parser with precedence and parentheses. Result digit count + grouped display + scientific approximation. 100% client-side, no network, no libraries.

Big Text Generator

Convert text to big, wide Unicode styles — fullwidth, bold sans, monospace, circled, squared. Copy-paste into bios, chats, and usernames. 100% private, accessibility-honest.

Binary Calculator

Add, subtract, multiply, divide binary numbers with step-by-step solution. 100% private. 100% private.

Binary Decimal Hex Converter

Convert between binary, decimal, and hex with step-by-step explanation. 100% private. 100% private.

Binary Encode/Decode

Encode/decode text as binary (7-bit ASCII, 8-bit UTF-8). Multiple formats supported.

DeveloperComing Soon

Binary File Signature & Magic Number Inspector

Detect a file's true type from its leading magic bytes (and trailer where relevant) using a 100+ entry bundled signature database (PNG, JPG, GIF, PDF, ZIP, ELF, PE, Mach-O, OLE, SQLite, WASM, GLB, ISO9660, and more). Show a hex dump of the header bytes with matched bytes highlighted, resolve ZIP-based container subtypes (docx / xlsx / pptx / jar / apk / epub / odt), explicitly warn on extension spoofing, and search the database by extension / MIME / format name / hex signature. 100% client-side, nothing uploaded.

Binary File Viewer

Decode any file's structure — inspect bytes as int8/16/32/64, uint, float32/64, ASCII, UTF-8, and hex. Big/little endian toggle, byte range selection, PNG/JPEG/ZIP/PDF structure templates, magic bytes detection, entropy stats. 100% client-side.

Binary Search Tree (BST) Visualizer

Step-by-step visualization of Binary Search Tree operations — insert, delete (all 3 cases: leaf, one child, two children + successor), and search — with animated comparison path. All four traversals (in-order, pre-order, post-order, level-order) with synchronized node highlighting and output. Live height, node count, balance factor per node, degenerate-tree warning for sorted input, successor / predecessor highlighting, bulk insert from a list, and shareable tree-state URLs. 100% client-side.

Binary to Octal Converter

Convert binary numbers to octal. 100% private. 100% private.

Bit Field / Bitmask / Flags Designer & Decoder

Design and decode bit fields / bitmasks visually. Define named single-bit flags and multi-bit fields within a word (8/16/32/64-bit), validate non-overlap, encode field values into a packed integer (bin/hex/dec), decode a packed integer back into named fields, and generate ready-to-compile code for C/C++, Rust bitflags!, Python IntFlag, Go consts and TypeScript. Includes POSIX file-mode, TCP flags, FAT attributes, ARM CPSR and x86 EFLAGS presets. 100% client-side and offline, BigInt-correct at 64-bit.

Bit Shift & Rotate Visualizer (<<, >>, >>>, ROL / ROR)

Visualize left and right shifts (<<, >> arithmetic, >>> logical) plus circular rotates (ROL, ROR) and rotate-through-carry (RCL, RCR) on integers at 8/16/32/64-bit widths. Animated per-bit movement, before/after binary grid, shifted-out bits + carry flag, ×/÷ by 2^k annotation, BigInt-correct at every width. 100% client-side and offline.

Bitrate Calculator

Calculate bitrate for audio/video encoding. 100% private. 100% private.

Bitwise Operation Calculator (AND / OR / XOR / NOT / Shift)

Evaluate bitwise expressions — AND, OR, XOR, NOT, NAND, NOR, XNOR, left shift, right shift (arithmetic & logical) — on two or more operands in mixed bases (bin/oct/dec/hex). Aligned bit-column grid, truth-table generator, selectable width (8/16/32/64-bit or BigInt), signed/unsigned toggle, and multi-input chained operations. 100% client-side.

Black & White (1-bit) Scan Optimizer

Optimize 1-bit black & white scanned PDFs. Threshold, dithering.

Black & White Scan Optimizer

Optimize 1-bit black & white scanned PDFs. Threshold, dithering, compression.

Blacklist IP Checker

Check IP addresses against known blacklist databases reference. 100% private. 100% private.

Blob Shape Generator (SVG)

Generate organic blob shapes as SVG. Random or seeded generation with smooth Bezier curves.

Blob Shape Generator (SVG)

Generate organic blob shapes as SVG. Random or seeded generation with smooth curves.

BMI Calculator

Calculate Body Mass Index (BMI) from height and weight in metric or imperial units. Get category (underweight / normal / overweight / obese), healthy weight range, and 10+ extras. 100% private.

Bold Text Generator

Convert text to 𝐛𝐨𝐥𝐝 Unicode styles — serif, sans, italic, script, fraktur, double-struck. Copy-paste into LinkedIn, Instagram, Discord. Decode back to normal. 100% private.

Bond Yield Calculator

Calculate current yield, YTM, and bond price with coupon and maturity inputs. 100% private. 100% private.

BPM Tempo Detector

Detect BPM by tapping or from audio analysis reference. 100% private. 100% private.

Braille Translator

Translate text to Braille (Grade 1 and 2) and back with Unicode rendering. 100% private. 100% private.

Brand Mention Monitor

Generate brand mention monitoring queries — Google Alerts, social search URLs (Twitter/X, Reddit, LinkedIn, YouTube, Hacker News, Product Hunt), news search URLs, competitor mention queries, niche keyword queries, founder mention queries, and backlink opportunity queries. 11+ platforms, filters by query type, history (localStorage), shareable URL. 100% client-side.

Breach Pwned Email Checker

Check if your email has been breached. Uses k-anonymity model for privacy-preserving HIBP-style checks.

NetworkComing Soon

Breadcrumb Schema Generator

Generate BreadcrumbList schema.org JSON-LD for rich results. Add/remove items, reorder up/down, bulk paste, live preview, Google Rich Results test link, and HTML script-tag wrapper. 100% client-side.

Break-Even Analyzer

Calculate break-even point in units and revenue. 100% private. 100% private.

Break-Even Calculator (Units, Revenue, Margin of Safety)

Calculate break-even point — units to sell, revenue needed, margin of safety, profit at expected sales, target profit units, contribution margin per unit and ratio, plus price sensitivity analysis. Enter fixed costs, variable cost per unit, price per unit, expected sales, and optional target profit. Export as text report or CSV. 16 extra features: contribution margin per unit, contribution margin ratio, break-even units, break-even revenue, target profit units, margin of safety units, margin of safety %, profit at expected sales, text report renderer, CSV export (metric, value, formula), copy + download .txt + CSV, history (localStorage, last 20), shareable URL (encode inputs in hash), summary stats, sensitivity analysis (±10% / ±20% price), input validation. 100% client-side.

Broken Backlink Finder

Find broken backlinks from imported data. Categorize HTTP status codes (2xx/3xx/4xx/5xx), detect broken links (404, 500, etc.), score reclamation opportunities, show anchors and source domains. CSV export, status code reference, history (localStorage), shareable URL. 100% client-side.

Broken Link Checker

Check for broken links in HTML content. Extract all links, classify internal vs external, detect common issues (empty href, javascript:, # only, missing protocol, relative without base), show link report with stats. CSV export, history (localStorage), shareable URL. 100% client-side.

Browser Frame Mockup Maker

Wrap screenshots in browser frame mockups. Chrome, Safari, Firefox styles with URL bar.

Browser Frame Mockup Maker

Wrap screenshots in browser frame mockups. Chrome, Safari, Firefox styles.

Bubble Text Generator

Turn text into ⓑⓤⓑⓑⓛⓔ circled, 🅐🅑🅒 negative circled, and 🄰🄱 squared Unicode letters. Copy-paste anywhere. Decode back to normal. 100% private.

Bulk File Timestamp Changer

Batch change file modification, access, and creation timestamps. Relative offsets, absolute dates, EXIF-based, filename-parse, and 10+ extras. 100% private.

Bulk Image Compressor

Compress multiple images at once. PNG, JPG, WebP, AVIF support with quality and size targets.

Bulk Image Converter

Convert multiple images between formats: PNG, JPG, WebP, AVIF, GIF, BMP. Batch processing.

Bulk Image Renamer + Optimizer

Batch-rename and optimize many images in one pass with live preview, token templates, conflict auto-resolve, perceptual-hash dedupe, and a single ZIP download — 100% in your browser.

Bulk Image Resizer

Resize multiple images at once. By percentage, fixed dimensions, or longest side. Batch processing.

Bulk Watermark Tool

Add text or image watermarks to multiple images. Position, opacity, size, rotation control.

Burn Rate Calculator

Calculate gross/net burn rate, runway, and cash zero date from financial data. 100% private. 100% private.

Business / Working Days Calculator

Count business days between two dates or add/subtract N working days from a date. Configurable weekends (Sat+Sun, Fri+Sat, Sun-only, Thu+Fri, none), custom holiday list, country holiday presets (US/UK/India/AU/CA 2025–2026), include/exclude end day, half-day handling, day-by-day breakdown, batch ranges with CSV export, saved holiday sets. Shareable URL. 100% client-side.

Business Card Maker

Generate business card layouts with QR code, contact info, vCard. 100% private. 100% private.

BZIP2 Compressor

Compress files to .bz2 format using a pure-JS BZIP2 header writer. Generates valid BZIP2 archives with the 'BZ' magic, configurable block size (1-9), and per-file compression stats. Batch compress, .tar.bz2 support, history, shareable URL — 100% client-side.

BZIP2 Decompressor

Decompress .bz2 files in the browser. Parses BZIP2 stream headers, validates the 'BZ' magic, extracts block size, and decompresses our simplified RLE1 body. .tar.bz2 auto-extraction, MIME detection, magic bytes check, history, shareable URL — 100% client-side.

CAB File Extractor

List and extract files from Microsoft Cabinet (.cab) archives in the browser — pure JavaScript MSCF parser. Lists folders and files with sizes/attributes, extracts stored (uncompressed) files, downloads all extractable files as a ZIP. 100% client-side.

Cache-Control Header Builder

Build Cache-Control headers visually. max-age, public/private, immutable, no-store.

DeveloperComing Soon

Caesar Cipher

Encrypt/decrypt with the Caesar shift cipher — any shift 1-25, ROT13 preset, brute-force solver showing all 25 candidates, and frequency-analysis auto-crack. 100% private.

Callback to Promise/Async-Await Converter

Convert callback-style functions to Promises and async/await.

DeveloperComing Soon

Calorie Calculator

Calculate daily calorie needs using Mifflin-St Jeor with activity levels. 100% private. 100% private.

Canonical Tag Checker

Check canonical tags for proper implementation. Detect canonical chains, conflicts, and self-referencing issues.

Canonical Tag Generator

Generate canonical link tags and check for common mistakes. URL normalization, pagination prev/next, hreflang integration, cross-domain warnings, batch processing. 100% client-side.

Capital Gains Calculator

Calculate capital gains tax with short/long-term rates and exemptions. 100% private. 100% private.

Cash Flow Projector

Project monthly cash flow with income/expenses. 100% private. 100% private.

CBR Comic Book Reader

Read CBR (RAR-based) comic book archives in the browser. Detects RAR4 and RAR5 signatures, parses archive headers, lists file entries (page count, sizes, types), and displays comic info. Honest about RAR extraction limitations — full decompression requires WASM. 100% client-side.

CBZ Comic Book Reader

Read CBZ (ZIP-format) comic books in the browser — extract pages, navigate, zoom, fullscreen, bookmark. Supports JPEG/PNG/WebP/GIF pages. Drag-drop, double-page mode, continuous scroll. 100% client-side.

Certificate PEM Parser

Parse PEM certificates, extract subject, issuer, validity, SAN, and 10+ extras. 100% private.

Change PDF Page Size

Change PDF page size. A4, A3, Letter, Legal, custom dimensions.

Change PDF Page Size

Change PDF page size. A4, A3, Letter, Legal, custom.

Changelog Generator from Commits

Generate changelogs from git commit messages. Conventional commits, semantic versioning.

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Chat with PDF (Q&A Local RAG)

Chat with PDF using local RAG. Ask questions, get answers from content.

Chat with PDF (Q&A Local RAG)

Chat with PDF using local RAG. Ask questions, get answers.

Checklist Creator

Create reusable checklists with templates, progress tracking, and export. 100% private. 100% private.

Checksum & Parity Bit Calculator (LRC, Fletcher, Adler, CRC, Luhn, Verhoeff)

Compute parity (even, odd, mark, space), LRC, sum checksums (8/16/32-bit, one's/two's complement, RFC-1071 Internet), XOR, Fletcher-16/32, Adler-32, CRC-8/16/32 (parameterised polynomial), Luhn, Verhoeff and ISBN-10/13 check digits over ASCII, hex, or binary input — with bit-level working, verify mode, endianness control, and history. 100% client-side & offline.

Checksum Verifier

Verify file checksums (MD5, SHA-1, SHA-256, SHA-512). Compare against expected hash.

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Chemical Equation Balancer

Balance chemical equations with stoichiometry and step-by-step solution. 100% private. 100% private.

Chemistry Formula Calculator

Calculate molar mass, empirical & molecular formulas, balance chemical equations, and percent composition. Built-in 118-element periodic table with atomic masses. Formula parser handles parentheses and hydrates (CuSO4·5H2O). Equation balancer uses brute-force integer search. 100% client-side — 18 extra features including CSV/text export, history, shareable URL, presets, isotope selector.

CHM Extractor

List and inspect Microsoft Compiled HTML Help (.chm) files in the browser — pure JavaScript ITSF + directory parser. View file tree (HTML files, images, index), detect file types, download individual uncompressed files. 100% client-side.

Chmod (File Permission) Calculator

Convert Linux/Unix file permissions between octal (755), symbolic (rwxr-xr-x), and a clickable 3×3 grid. Full special-bit support (setuid/setgid/sticky with correct s/S/t/T case), symbolic-mode arithmetic (u+x,go-w), security linter (flags 777/world-writable/setuid on scripts), recursive safe-find pattern, umask companion, copy-ready chmod command, common presets, and shareable URL. 100% client-side.

Churn Rate Calculator

Calculate customer and revenue churn with cohort analysis and MRR impact. 100% private. 100% private.

CIDR ↔ IP Range / Netmask Converter

Convert in every direction between CIDR notation, IP range (start–end), netmask (dotted decimal), and wildcard mask. Decompose any IP range into the minimal exact set of CIDR blocks. Supports both IPv4 and IPv6 with batch conversion of many CIDRs or ranges. 100% client-side.

CIDR Aggregator & Network Summarizer

Aggregate messy lists of IPs, dashed ranges, and CIDR blocks (IPv4 and IPv6) into the smallest possible set of CIDR prefixes. Merges overlapping and adjacent blocks, dedupes, optionally subtracts exclusions, shows before/after prefix and address counts (BigInt), and exports as CIDR list, IP ranges, Cisco ACL, pfSense alias, or nginx allow. 100% client-side.

CIDR IP Calculator

Calculate IPv4 and IPv6 CIDR network info: network address, broadcast, host range, subnet mask, wildcard, host count. 100% offline.

CircleCI Config Generator

Generate CircleCI configuration files. Jobs, workflows, orbs, docker executors.

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Citation Generator

Generate academic citations in APA, MLA, Chicago, and Harvard styles for books, journals, websites, newspapers, magazines, conference papers, and theses. Author formatter, multiple-author handler with et al., title formatter, year placement, page range, URL + accessed date, in-text citations, DOI validator, bibliography sorter, text/HTML/Markdown/CSV export, history (localStorage), shareable URL. 100% client-side.

Class Schedule Maker

Create weekly class schedules with time slots, rooms, and conflict detection. 100% private. 100% private.

Cliche Finder

Find cliches in text with curated database and fresh alternative suggestions. 100% private. 100% private.

Code to Image Screenshot Generator

Convert code snippets to beautiful images. Syntax highlighting, themes, watermarks.

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Codec Comparison Tool

Compare audio/video codecs by quality, size, compatibility. 100% private. 100% private.

Color Blindness Simulator

Simulate how images appear to users with color blindness (protanopia, deuteranopia, tritanopia, etc.).

Color Contrast Checker (WCAG)

Check color contrast for WCAG AA/AAA compliance with APCA support. 100% private. 100% private.

Color Contrast Checker (WCAG)

Check color contrast ratios for WCAG 2.1 AA/AAA compliance. Foreground/background picker.

Color Contrast Checker (WCAG)

Check color contrast ratios for WCAG 2.1 AA/AAA compliance. Foreground/background picker.

Color Mixer Blender

Mix and blend colors with multiple blend modes. Generate palettes. 100% private. 100% private.

Color Mixer Blender

Mix and blend two colors. Normal, multiply, screen, overlay, and 13 other blend modes.

Color Palette Extractor

Extract dominant color palettes from images. K-means clustering, 3-10 colors, hex/RGB/HSL output.

Color Picker & Converter

Pick colors and convert between HEX, RGB, HSL, and HSV. Includes WCAG contrast checking for accessibility. 100% private.

Color Shades & Tints Generator

Generate shades (darker) and tints (lighter) of any color. 10-step scales for design systems.

Column Extractor (Delimited)

Extract specific columns from delimited text (CSV, TSV). Custom delimiter, column selection.

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Combine Pages Side-by-Side (2-up)

Combine 2 PDF pages side-by-side on one page. N-up imposition.

Combine Pages Side-by-Side (2-up)

Combine 2 PDF pages side-by-side on one page. N-up imposition.

CommonJS to ES Modules Converter

Convert require/module.exports to import/export. ES Module syntax.

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Compare PDF (Diff)

Compare two PDFs and highlight differences. Text and visual comparison.

Compare PDF (Diff)

Compare two PDFs and highlight differences. Text and visual.

Competitor Rank Comparison

Compare your keyword rankings against competitors (up to 5). Side-by-side table, opportunity detection (where you rank worse), keyword overlap, avg position per domain, winner per keyword, export CSV, copy report, history (localStorage), shareable URL. 100% client-side.

Competitor Website Analyzer

Compare your site against competitors across 10 SEO dimensions. Paste CSV (domain,metric,value) from Ahrefs/Semrush/Moz, get a comparison matrix, leader per metric, your rank, gap analysis, quick wins (gap < 20%), critical gaps (gap > 50%), strengths/weaknesses, text/CSV reports. 100% client-side.

Complementary Color Finder

Find complementary, analogous, triadic, tetradic, and split-complementary color schemes.

Compound Interest Calculator

Calculate compound interest: A = P(1+r/n)^(nt). Multiple compounding frequencies, regular contributions, inflation adjustment, and 10+ extras. 100% private.

Compress PDF

Reduce PDF file size by re-saving with object streams and optionally stripping metadata. 100% private — runs in your browser, no uploads.

Compress PDF

Reduce PDF file size by downsampling images, removing metadata, optimizing streams.

Compress PDF to Target Size

Compress PDF to a specific target file size. Iterative quality reduction.

Compress PDF to Target Size

Compress PDF to a specific target file size. Iterative quality reduction.

Concentration Calculator

Calculate solution concentration (molarity, molality, normality). 100% private. 100% private.

Connection String Builder & Parser

Build and parse database connection strings for PostgreSQL, MySQL, MongoDB, Redis, SQL Server, and SQLite. Convert between URI, key/value, and JDBC formats with correct percent-encoding of user, password, and parameters. Validate, mask passwords, multi-host, and SSL params. 100% client-side — secrets never leave the browser.

Console.log/Debug Statement Remover

Remove console.log, debugger, and debug statements from JavaScript.

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Console.log/Debug Statement Remover

Remove console.log, debugger, and debug statements from JavaScript.

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Content Brief Generator

Generate SEO content briefs for writers: target keyword, title, search intent, word count target, outline, key points, LSI keywords, internal/external links, and competitor URLs. Export as Markdown or HTML. 100% client-side.

Content Calendar Planner

Generate monthly content calendars with topic, channel, content type, and keyword assigned per posting day. Supports daily/weekdays/3×-week/weekly frequencies, 7 channel presets, weighted content-type mix, 7-day topic dedup, conflict detection, ICS calendar export, CSV export, summary stats, history (localStorage), shareable URL. 100% client-side.

Content Calendar Scheduler

Plan monthly content calendars across 6 platforms (Twitter, Instagram, LinkedIn, Facebook, TikTok, YouTube). Pick posting frequency per platform (daily / 3x-week / weekly / bi-weekly), rotate content themes (7-day dedup), assign per-platform time slots, exclude weekends, detect same-time conflicts and content-gap days. Export to ICS calendar, CSV, HTML, Markdown and text. Plus per-platform summary stats, theme balance checker, best-time-to-post hints, and shareable URL. 100% client-side.

Content Distribution Planner

Plan multi-channel content distribution. Generate platform-specific snippets for 11 channels (Twitter/X, LinkedIn, Facebook, Instagram, Email, Reddit, Hacker News, Dev.to, Medium, YouTube Community, Discord). Per-platform char limit validation, hashtag limits, hashtag generator, CTA inserter, CSV export, history (localStorage), shareable URL. 100% client-side.

Content Gap Analyzer

Compare your content against up to 3 competitors to find keyword gaps (in competitors but not in yours) and unique keywords (in yours but not in theirs). Includes overlap %, priority scoring, CSV/Markdown export. 100% client-side.

Content Negotiation Helper

Build Accept headers for content negotiation. Media types, quality factors.

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Content Outline Generator

Generate SEO-optimized content outlines with H1 + H2s + H3s. Pick a template (blog post, listicle, how-to, comparison, case study), set word targets per section, and export as markdown / HTML / JSON. 100% client-side.

Content Pruning Auditor

Audit content inventory for keep/improve/merge/redirect/delete decisions. CSV parser, weighted pruning score, Conservative/Balanced/Aggressive presets, threshold customization, summary stats, CSV/text export, history, shareable URL. 100% client-side.

Content Readability & SEO Score Analyzer

Analyze content readability (Flesch-Kincaid, Gunning Fog) and SEO score. Recommendations for improvement.

Content Readability Analyzer

Analyze content readability with 6 formulas — Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, Coleman-Liau, ARI. Includes syllable counter, passive voice detector, sentence length stats, reading time, and grade level. 100% client-side.

Content Word Count & Comparison

Word count, reading time, and content comparison tool. Compare two articles for overlap and uniqueness.

Content Word Count & SEO Analyzer

Real-time word, character, sentence, and paragraph counter. Includes reading time (200/250 WPM), speaking time (130 WPM), top-10 keyword density, sentence length distribution, paragraph stats, and a content SEO score. 100% client-side.

Contract Date Calculator

Calculate contract milestones, deadlines, notice periods, renewal dates. 100% private. 100% private.

Contract Template Generator

Generate common business contract templates — NDA (mutual/one-way), freelance, service agreement, independent contractor, consulting, MSA and SOW. Substitute party names, dates, compensation, payment terms and additional clauses. Render as printable HTML, plain text or markdown. 18 extra features: 8 contract type templates, 5 duration presets, 5 payment term presets, effective-date formatter, end-date calculator, compensation formatter, payment-terms formatter, additional-clause combiner, text/HTML/markdown renderers, section counter, clause validator, disclaimer generator, summary stats, history (localStorage), shareable URL. 100% client-side.

Conventional Commit Message Builder

Build conventional commit messages. feat, fix, docs, chore, scope, breaking changes.

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Conversion Tracking Tag Generator

Generate conversion tracking tags for Google Ads, Facebook Pixel (Meta), LinkedIn Insight, and Twitter (X). Base + event snippets, custom parameters, HTML output ready to paste. 100% client-side.

Cookie Consent Banner Generator

Generate GDPR/CCPA cookie consent banners. Pure HTML/CSS/JS, no dependencies. Customizable themes.

Core Web Vitals Analyzer

Analyze Core Web Vitals from imported PageSpeed Insights JSON. Extract LCP/INP/CLS/FCP/TTFB/TBT/SI metrics, score against Google thresholds, show pass/warn/fail per metric, overall 0-100 score, prioritized recommendations. CSV export, history (localStorage), shareable URL. 100% client-side.

CORS Test Tool

Test CORS configuration by generating curl commands. Diagnose preflight, headers, and origin policies.

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CORS Tester & Config Generator

Generate CORS headers. Preflight simulator. Server config for Nginx/Apache/Express/Cloudflare.

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Count Occurrences

Count occurrences of words, characters, or patterns in text. Case-insensitive.

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Countdown Timer Generator (Embeddable)

Generate a self-contained, watermark-free, embeddable countdown (or count-up) timer to any target date/time. Output as plain text, HTML widget snippet, or ICS calendar event. Per-visitor or fixed-timezone display, DST-safe, multiple themes/styles, on-finish behavior, recurring annual countdowns. 100% client-side.

Crawl Budget Estimator

Estimate Googlebot crawl budget from site metrics and get prioritized optimization recommendations. Heuristic crawl rate, efficiency %, time-to-full-crawl, score visualization, comparison mode, site size presets, CSV export, history (localStorage), shareable URL. 100% client-side.

CRC32 Calculator

Calculate CRC32 (IEEE 802.3), CRC32C (Castagnoli), CRC32B. Hex + decimal output. File support.

DeveloperComing Soon

Create PDF Form (Builder)

Create fillable PDF forms. Text fields, checkboxes, radio, dropdowns.

Create PDF Form (Builder)

Create fillable PDF forms. Text fields, checkboxes, radio, dropdowns.

Create PDF Form (Builder)

Create fillable PDF forms. Text fields, checkboxes, radio, dropdown.

CREATE TABLE Generator

Design a SQL table visually and generate correct CREATE TABLE DDL for MySQL, PostgreSQL, SQLite, and SQL Server. Add columns, types, defaults, primary keys (single/composite), unique, foreign keys with ON DELETE/UPDATE, indexes, CHECK constraints, ENUMs and comments. Includes CSV/JSON column inference, IF NOT EXISTS, matching DROP TABLE, seed INSERT scaffolding, MySQL engine/charset, SQLite WITHOUT ROWID, reserved-word auto-quoting and per-dialect identifier limits. 100% client-side.

Credit Card Test Number Generator

Generate Luhn-valid, clearly-fake test credit card numbers for sandbox use. Per-brand BIN prefixes (Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay, Maestro) with matching expiry, CVV, and cardholder name. Bulk export to JSON/CSV/text. Includes official processor sandbox library (Stripe, Adyen, Braintree, PayPal). 100% client-side — sandbox only, never real.

Cron Expression Builder

Build cron expressions visually. Every minute, hour, day, week, month with preview.

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Cron Expression Parser

Parse cron expressions, show human-readable schedule, next run times. 100% private. 100% private.

Cron Expression Parser (Human Readable)

Parse cron expressions to human-readable schedule. Next N run times.

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Crontab Generator

Build cron expressions visually — pick minute/hour/day/month/weekday via every / every-N / specific / range / list controls, get a valid 5-field expression, a plain-English description, the next N run times (timezone-aware), and 15+ presets (every 5 min, hourly, daily, weekly, monthly, weekdays, weekends, quarterly, yearly). Two-way builder↔expression sync, validator (catches the day-of-month vs day-of-week OR-semantics gotcha), Quartz 6/7-field and AWS EventBridge modes. 100% client-side — no network.

Crop PDF Pages

Crop PDF pages by setting custom margins (top, bottom, left, right). Apply to all or selected pages. 100% private, runs in your browser.

Crop PDF Pages

Crop PDF pages to remove margins or unwanted content. Visual crop selection.

Crop to Content (Auto-Trim Margins)

Automatically detect content boundaries and crop PDF pages.

Crossword Clue Generator

Generate crossword clues from a word list with difficulty levels. 100% private. 100% private.

Crypto Price Widget Customizer

Customize crypto price widget with coin selection and styling. 100% private. 100% private.

Cryptographic Key Generator (AES/RSA/ECDSA)

Generate cryptographic keys for AES, RSA, ECDSA, Ed25519 using WebCrypto. Export in PEM/JWK/raw formats.

Cryptographic Key Generator (AES/RSA/ECDSA)

Generate cryptographic keys for AES, RSA, ECDSA, Ed25519 using WebCrypto.

CSP (Content Security Policy) Generator

Generate Content-Security-Policy headers. All directives, validation, presets.

CSP Evaluator & Builder

Evaluate Content Security Policy headers for security weaknesses, detect bypass gadgets, suggest strict CSP, generate nonces, compare two CSPs, and export to Nginx/Apache/meta-tag. 100% client-side.

CSP Generator

Build a Content-Security-Policy header directive-by-directive and evaluate it live for XSS bypasses (unsafe-inline, wildcards, missing object-src/base-uri). Supports strict-dynamic + nonce/hash, Report-Only, reporting endpoints, Nginx/Apache/meta output, and paste-to-audit. 100% client-side.

CSR Generator Reference

Generate and parse Certificate Signing Requests (CSR) reference. 100% private. 100% private.

CSS @font-face Generator

Generate css @font-face generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Animation (Keyframes) Generator

Generate CSS @keyframes animations visually. Bounce, fade, rotate, slide presets.

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CSS Animation Keyframes Generator

Generate css animation keyframes generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Aspect Ratio Helper

Generate css aspect ratio helper with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Background Pattern Generator

Generate css background pattern generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Beautifier

Generate css beautifier with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Blend Mode Previewer

Generate css blend mode previewer with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Border Radius Generator

Generate css border radius generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Box Shadow Generator

Generate css box shadow generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Button Generator

Generate css button generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Clip-path Generator

Generate css clip-path generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Color Format Converter

Generate css color format converter with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Cubic Bezier Editor

Generate css cubic bezier editor with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Filter Generator

Generate css filter generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Flexbox Playground

Generate css flexbox playground with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Glassmorphism Generator

Generate css glassmorphism generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Gradient Generator

Generate css gradient generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Grid Generator

Generate css grid generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Grid Template Builder

Build CSS Grid templates visually. Areas, columns, rows, gap.

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CSS Grid Template Builder

Build CSS Grid templates visually. Areas, columns, rows, gap.

DeveloperComing Soon

CSS Loader/Spinner Generator

Generate css loader/spinner generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Media Query Generator

Generate css media query generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Minifier

Generate css minifier with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Neumorphism Generator

Generate css neumorphism generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Reset/Normalize Snippet

Generate CSS reset or normalize snippets. Modern, minimal, Tailwind-style presets.

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CSS Reset/Normalize Snippet Generator

Generate CSS reset or normalize snippets. Modern, minimal, Tailwind-style.

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CSS Scrollbar Styler

Generate css scrollbar styler with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Selector Tester

Generate css selector tester with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Specificity Calculator

Generate css specificity calculator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Sprite Generator

Generate CSS sprites from multiple images. Background-position, CSS output.

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CSS Sprite Generator

Generate CSS sprites from multiple images. Background-position, CSS output.

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CSS Text Shadow Generator

Generate css text shadow generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS to SCSS Converter

Convert CSS to SCSS. Nesting, variables, mixins, partials.

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CSS to SCSS Converter

Convert CSS to SCSS. Nesting, variables, mixins, partials.

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CSS Tooltip Generator

Generate css tooltip generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Transform Generator

Generate css transform generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Transition Generator

Generate css transition generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Triangle Generator

Generate css triangle generator with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Units Converter

Generate css units converter with live preview, presets, and 10+ extras. 100% private, offline-capable.

CSS Unused Rules Finder

Find unused CSS rules by comparing against HTML. Dead CSS elimination.

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CSS Unused Rules Finder

Find unused CSS rules by comparing against HTML. Dead CSS elimination.

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CSS Variables (Custom Props) Generator

Generate CSS custom properties. Naming, themes, fallback values.

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CSV Column Reorder

Reorder, add, remove columns in CSV data. Drag-and-drop interface with preview.

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CSV File Joiner

Merge multiple CSV files into one with header-aware alignment, column matching, dedup, and export. Supports inner/outer join modes, custom delimiters, column reorder, row sorting, filtering, and preview. 100% client-side.

CSV File Splitter

Split a large CSV file into smaller files by row count, file size (MB), column value (group-by), or a fixed number of output files. Header preservation, custom filename templates, dedup, column selection, ZIP export. 100% client-side.

CSV to Excel Converter

Convert CSV files to XLSX with typed cells (text, number, date, boolean) — pure JS, no SheetJS. Batch convert multiple CSVs into one multi-sheet workbook. Auto-fit column widths, header styling, custom delimiters. 100% client-side.

CSV to JSON Converter

Convert CSV data to JSON arrays or objects. Custom delimiters, header rows, type inference.

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CSV to Markdown Table

Convert CSV/TSV to GitHub-Flavored Markdown, HTML, or Jira tables. RFC-4180-aware (handles quoted fields, pipes, newlines). Per-column alignment. 100% private.

CSV to SQL INSERT Converter

Convert CSV or TSV data into SQL INSERT statements with smart type inference (int/decimal/boolean/date/text), NULL vs empty-string handling, RFC 4180-correct parsing, batched multi-row inserts, optional CREATE TABLE, and UPSERT (ON CONFLICT / DUPLICATE KEY / MERGE). Multi-dialect (ANSI/MySQL/PostgreSQL/SQLite/T-SQL). 100% client-side.

CSV to Text List

Convert CSV to a plain text list — one item per line or custom-delimited. Column selection, dedupe, quote/prefix/suffix wrapping. RFC-4180-aware. 100% private.

CSV to TSV Converter

Convert CSV (comma-separated) to TSV (tab-separated) with RFC 4180 compliant parsing and proper quote handling. Custom input/output delimiters, batch convert multiple files, trim whitespace, remove empty rows, skip header, and preview. 100% client-side.

curl Command Builder

Build curl commands visually. URL, method, headers, body, auth, options.

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curl Command Builder

Build curl commands visually. URL, method, headers, body, auth.

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curl to Code Converter

Convert curl commands to JavaScript, Python, Go, Rust, PHP code.

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curl to Code Converter

Convert curl commands to JavaScript, Python, Go, Rust, PHP code.

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Custom Reorder PDF Pages

Custom reorder PDF pages with drag-and-drop. Visual thumbnails.

Custom Reorder PDF Pages

Custom reorder PDF pages with drag-and-drop. Thumbnails.

Customer Tracker

Track customers and follow-ups — contact info, last-contact date, status, value. Compute days since last contact, total and average customer value, status breakdown, overdue follow-ups, and a follow-up priority list (oldest first). 100% client-side with email + phone validation, CSV/text export, history, and shareable URLs.

Data Storage Converter

Convert between bits, bytes, KB, MB, GB, TB, PB, KiB, MiB, GiB, TiB, and 10+ extras. 100% private.

Data Unit Converter

Convert between bits, bytes, KiB, MiB, GiB, TiB, PiB, KB, MB, GB, TB with all-units table. 100% private. 100% private.

Data URI Decoder

Decode data URIs back to original content. Extract MIME type and data.

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Data URI Generator

Generate data URIs from text or files. Base64 encoding, MIME type detection.

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Data URL Converter

Convert files to data: URLs and back. SVG optimization, batch encoding, embed templates (HTML/CSS/JS/JSON), size validation, magic bytes detection, and drag-drop. 100% private, offline.

Database Schema Diff

Compare two database schemas (DDL dumps) and generate a structural diff plus a dependency-ordered ALTER TABLE migration script. Detects added/dropped/changed tables, columns, types, constraints, and indexes; flags data-loss operations. Multi-dialect (ANSI/MySQL/PostgreSQL/SQLite/T-SQL). 100% client-side.

Date Difference Calculator

Calculate the difference between two dates in calendar years/months/days and totals in weeks/days/hours/minutes/seconds. Include/exclude end day toggle with plain-English explanation. Business-days mode with custom weekend + holiday list. Age calculation. 'Ago / from now' phrasing. Batch mode. Shareable URL. 100% client-side.

Date Format Converter (strftime / token)

Convert a date into any custom format string and translate format patterns between 7 ecosystems — strftime (C/Python), Moment/Day.js, Luxon, date-fns, Java SimpleDateFormat, .NET, and Unicode LDML. 200+ format tokens. Live preview, footgun linter (YYYY week-year, DD vs dd, hh vs HH), code snippets per library, best-effort format detection. 100% client-side.

Day of the Week Finder

Find which day of the week any date falls on using Zeller's congruence and Sakamoto's algorithm — plus day-of-year, ISO week, days until/since today, next/previous weekday finder, Nth weekday of month (e.g. 2nd Tuesday), recurring-weekday view across a year range, and Doomsday-rule teaching mode. 100% client-side.

DEB Extractor

Extract files from Debian .deb packages in the browser — pure JavaScript AR archive parser. Lists debian-binary, control.tar.gz, and data.tar.gz members; parses control for package name/version/architecture; preview text members; download individual files or all as ZIP. 100% client-side.

Decision Matrix Builder

Build weighted decision matrices to compare options across criteria. Enter options, criteria, weights, and scores (1-5). Compute weighted scores per cell, totals per option, rank options, identify the winner, and run ±10% sensitivity analysis. Export as text report, CSV, or color-coded HTML. 18 extra features: options parser, criteria parser, weights parser with normalization, scores parser with validation, weighted score calculator, total per option calculator, option ranker, best option identifier, weight normalizer, score validator (1-5), sensitivity analysis, multi-format renderers, copy/download, history (localStorage), shareable URL, summary stats. 100% client-side.

Definition Lookup

Offline dictionary lookup with Wiktionary/WordNet data reference. 100% private. 100% private.

Delete Page Range from PDF

Delete a specific page range from PDF. Simple range selection.

Delete Page Range from PDF

Delete a specific page range from PDF. Simple selection.

Delete Pages from PDF

Remove specific pages from PDF. Page range selection, preview before deletion.

Delete PDF Pages

Remove unwanted pages from a PDF by entering page numbers or ranges (e.g. 2, 5-7). Preview the page count before and after, then download the cleaned PDF. 100% private.

Depreciation Calculator

Calculate depreciation: straight-line, declining balance, sum-of-years, MACRS. 100% private. 100% private.

Deskew Straighten Scanned PDF

Detect and correct page skew in scanned PDFs.

Deskew/Straighten Scanned PDF

Automatically detect and correct page skew in scanned PDFs.

Despeckle Clean Scanned PDF

Remove noise and speckles from scanned PDF pages. OCR quality.

Despeckle/Clean Scanned PDF

Remove noise and speckles from scanned PDF pages. Improve OCR quality.

Device Mockup Generator (Phone/Laptop)

Wrap screenshots in device mockups: iPhone, Android, MacBook, Surface, etc. Realistic shadows.

Device Mockup Generator (Phone/Laptop)

Wrap screenshots in device mockups: iPhone, Android, MacBook, Surface, etc.

Dice Roller & Random Picker

Roll any dice (d4, d6, d8, d10, d12, d20, d100, custom faces) with full RPG dice-notation support: 3d6+2 modifiers, 4d6kh3 keep-highest, 2d20kl1 advantage/disadvantage, d6! exploding, and multi-term expressions. Plus a random list picker (weighted or unweighted), coin flip, seedable for reproducibility, and roll history + distribution stats. 100% client-side.

Diff Checker

Compare two texts side-by-side or unified — line, word, and character-level diff with the Myers algorithm. File input, .patch export, ignore whitespace/case. 100% private.

Digital Signature with Certificate (PKI)

Digitally sign PDFs with X.509 certificates. PKI, PAdES, timestamp.

Digital Signature with Certificate (PKI)

Digitally sign PDFs with X.509 certificates. PKI, PAdES, timestamp.

Digital Signature with Certificate (PKI)

Digitally sign PDFs with X.509 certificates. PKI, PAdES.

Dilution Calculator

Calculate dilution using C1V1=C2V2 formula. 100% private. 100% private.

Disavow File Generator

Generate Google Disavow files from URL lists. Domain-level or URL-level entries, comments, dedup, alphabetical sort, stats, and download as .txt. 100% client-side — your data never leaves the browser.

Disclaimer Generator

Generate legal disclaimers for websites, apps, and content. Affiliate, medical, legal, fitness, financial.

Discount Calculator

Calculate final price after discount, original price from final + %, stacked discounts, BOGO savings, and tax-inclusive final. With 10+ extras. 100% private.

Djvu To Pdf Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

DKIM Record Generator & Validator

Build a valid DKIM DNS TXT record (selector._domainkey) from the v / k / p / h / s / t / n tags (RSA 1024/2048/4096 or Ed25519), validate any existing record against RFC 6376, decode every tag with plain-English explanations, estimate the public-key bit length, generate dig / nslookup / kdig (DoH) lookup commands for the selector, generate OpenDKIM keygen + openssl key-generation commands, and split long 2048/4096-bit TXT records into publishable chunks. 100% client-side generation and validation; live lookup requires the network via the generated dig commands.

DKIM Record Validator

Validate DKIM DNS records. Check selector, public key, key length, and signing algorithm compatibility.

NetworkComing Soon

DMARC Record Analyzer

Analyze DMARC DNS records. Policy (none/quarantine/reject), alignment, reporting (RUA/RUF), percentage.

NetworkComing Soon

DMARC Record Generator & Validator

Build a valid DMARC DNS TXT record (_dmarc.<domain>) from the v / p / sp / rua / ruf / fo / adkim / aspf / pct / rf / ri tags (policy none / quarantine / reject, subdomain policy, aggregate & forensic report URIs, failure-reporting options, DKIM & SPF alignment modes, percentage, report format & interval), validate any existing record against RFC 7489, decode every tag with plain-English explanations, validate rua/ruf mailto: syntax, score the policy strength (0–100), generate an enforcement roadmap (none → quarantine → reject), and generate dig / nslookup / kdig (DoH) lookup commands. 100% client-side generation and validation; live lookup requires the network via the generated dig commands.

DMG Extractor

Inspect macOS DMG disk images in the browser — pure JavaScript UDIF trailer (koly) parser. Detects the 'koly' signature at the file's tail (last 512 bytes), parses the trailer fields (version, header size, flags, data fork offset/length, resource fork offset/length, segment info, plist pointer), and lists partition hints. Honest about HFS+/APFS extraction limitations — full disk-image decoding requires native libraries. 100% client-side.

DNS Leak Test

Test for DNS leaks by generating unique subdomain queries. Detects if your DNS is leaking to ISP.

NetworkComing Soon

DNS Propagation Checker Reference

Generate dig / kdig (DoH) / PowerShell Resolve-DnsName commands to check DNS propagation of any record (A, AAAA, CNAME, MX, TXT, NS, SOA, CAA) across 20+ global public resolvers (Google, Cloudflare, Quad9, OpenDNS, AdGuard, NextDNS, Comodo, Verisign, Yandex, etc.) with region metadata. Compare expected vs actual answers (exact / contains / regex). Compute a TTL-based propagation ETA. Generate bash + PowerShell batch scripts, CSV/JSON export, and authoritative-vs-recursive comparison. 100% client-side — generates commands only; actual lookups require running them in your terminal.

DNS Record Lookup Reference

Reference every common DNS record type (A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, SRV, CAA, DS, DNSKEY, RRSIG, DKIM, DMARC, etc.) with format, fields, examples, and use cases. Generate ready-to-paste dig / nslookup / kdig (DoH) / delv (DNSSEC) / host commands for the resolver of your choice (Google, Cloudflare, Quad9, OpenDNS, authoritative, custom). Parse example records into field breakdowns. 100% client-side — generates commands only; actual lookups require running them in your terminal.

DNS Record Validator

Validate DNS record format: A, AAAA, CNAME, MX, TXT, SRV, CAA. 100% private. 100% private.

DNS-over-HTTPS (DoH) Query Tool

Generate DNS-over-HTTPS (RFC 8484) query URLs and curl/wget/httpie/fetch commands for Cloudflare (1.1.1.1), Google (dns.google), Quad9 (9.9.9.9), and custom DoH resolvers. Both JSON mode (?type=A) and wire-format mode (application/dns-message, base64url-encoded query). Pure-JS DNS message encoder builds the wire-format query from name + type + flags. Parse pasted DoH JSON responses into structured tables (Status, Answer, Authority, Additional, flags AD/RA/RD, Comment). DNSSEC flags (do/cd) toggle, side-by-side resolver comparison, history (localStorage), shareable URL. 100% client-side — generates URLs/commands and parses output only; actual DoH queries require the network.

DNSSEC Validator

Validate DNSSEC configuration. Check DS records, RRSIG, NSEC, and trust chain.

NetworkComing Soon

Docker Compose YAML Generator

Generate docker-compose.yml files. Services, volumes, networks, env.

DeveloperComing Soon

Dockerfile Generator

Generate Dockerfiles for various languages. Multi-stage, Alpine, slim, production-ready.

DeveloperComing Soon

Dockerignore Generator

Generate .dockerignore files. Exclude node_modules, .git, build artifacts.

DeveloperComing Soon

Dotfiles Manager Generator

Scaffold a dotfiles repo + idempotent install script. Pick the configs to track (.bashrc, .vimrc, .gitconfig, .tmux.conf, ssh config, …), choose a manager (GNU Stow / bare-git / chezmoi / Dotbot) with a full comparison table, and get a repo tree, README, idempotent install.sh that backs up existing files, and a secret-safe .gitignore with a 'never commit these' checklist. 100% client-side.

Downsample Images in PDF

Reduce image resolution in PDF to decrease file size. DPI target, quality.

DPI Changer

Change image DPI/resolution without resizing. Supports 72/96/150/300/600 DPI presets. 100% private. 100% private.

Draw Signature & Place on PDF

Draw a signature with mouse/touch and place it on PDF pages.

Draw Signature & Place on PDF

Draw a signature with mouse/touch and place it on PDF pages.

Draw Signature & Place on PDF

Draw a signature with mouse/touch and place on PDF pages.

Draw Signature on PDF

Place a signature image (PNG/JPEG) on any PDF page at a custom position and size. Draw your signature on paper, photograph it, then overlay it. 100% private.

Dummy Image Generator

Generate placeholder/dummy images with custom dimensions, colors, and text. Like placeholder.com but offline.

Duotone Image Maker

Convert images to duotone (two-color) effect. Shadow and highlight color picker.

Duplicate File Finder

Find duplicate files by comparing sizes and SHA-256 hashes. Drop multiple files, see which are identical, group duplicates, and export results. Partial-hash (first 4KB) for speed, full-hash for confirmation. 100% client-side.

Duplicate Lines Remover

Remove duplicate lines from a list — keep first or last, case-insensitive, trim before comparing, sort, and report removed lines. 100% private.

Duplicate PDF Pages

Clone selected pages in a PDF N times. E.g. duplicate page 3 five times to repeat it. Supports page ranges. 100% private, runs in your browser.

Duplicate/Clone PDF Pages

Duplicate specific pages in a PDF. Custom count, page ranges.

Duplicate/Clone PDF Pages

Duplicate specific pages in a PDF. Custom count, page ranges.

E-commerce Product SEO Optimizer

Optimize e-commerce product page SEO — generate SEO title (60 chars), meta description (155 chars), URL slug, Product JSON-LD schema, heading structure, keyword extraction, alt-text suggestions, content score with breakdown, bulk CSV mode, currency presets, history, shareable URL. 100% client-side — paste product details, get instant SEO output.

ECDSA Key Generator

Generate ECDSA key pairs. P-256, P-384, P-521 curves, PEM/JWK export.

DeveloperComing Soon

Edge-Case / Naughty String Generator

Browse, filter, and export a curated library of 200+ naughty edge-case test strings — the Big List of Naughty Strings plus Unicode, emoji, RTL/bidi overrides, zalgo, SQL injection, XSS payloads, control chars, zero-width, null bytes, boundary values, and more. Categorized, searchable, seed-reproducible random sampling, and one-click export to JSON, CSV, Playwright, Jest, or pytest fixtures. 100% client-side, defensive QA use only.

Edit/Annotate PDF

Annotate PDFs. Highlights, comments, drawings, stamps, text boxes.

Edit/Annotate PDF

Annotate PDFs. Highlights, comments, drawings, stamps, text boxes.

EditorConfig Generator

Generate .editorconfig files. Indent style, charset, line endings.

DeveloperComing Soon

EFF Passphrase Generator

Generate secure passphrases using EFF wordlists. 4-10 words, separators.

DeveloperComing Soon

Email Address Generator & Validator

Generate valid-format test email addresses (random or name-based, custom domain) and validate any address in layers — RFC 5322 syntax, domain/TLD sanity, disposable-provider detection, typo suggestion (gmial→gmail), and role-address flag. Batch support, pure JS, 100% client-side.

Email Header Analyzer

Parse RFC 5322 email headers — Received chain, SPF, DKIM, DMARC, Message-ID, hops, delays. 100% client-side.

Email Signature Generator

Generate professional email signatures with social links and styling. 100% private. 100% private.

Email Template Manager

Generate, customize, and store business email templates for 10 common scenarios — welcome, follow-up, meeting-request, proposal, thank-you, reminder, apology, newsletter, out-of-office, sales-outreach. Each template has 5 tone variants (formal, professional, casual, friendly, urgent). Variable substitution, subject auto-generator, read-time estimator, placeholder validator, multi-template batch generator. Render as text, HTML, or markdown. 18 extra features. 100% client-side.

Emoji Picker & Keyboard

Browse, search, and copy emojis from a 600+ built-in database. 9 categories (smileys, gestures, animals, food, activities, travel, objects, symbols, flags), keyword search, skin-tone selector (5 tones), recently used tracker (max 50), related emojis, ZWJ combination generator, top-100 presets, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Employee Shift Trader

Calculate shift swap feasibility, coverage impact. 100% private. 100% private.

Empty File Creator

Generate empty or fixed-size dummy files for testing. Fill patterns (zeros, random, 0xFF, sequential), size presets (1KB / 1MB / 100MB / 1GB), custom extensions, filename templates with numbering, batch creation, and download. 100% client-side.

Endianness (Byte Order) Converter

Convert byte order between big-endian, little-endian and middle-endian (PDP-11) across 16/32/64-bit words. Each ordering is decoded simultaneously as signed / unsigned integer and IEEE 754 float32 / float64, with batch byte-array splitting, per-byte visualization with endianness role labels, and shareable URLs. 100% client-side and offline, BigInt-correct at 64-bit.

Env File Parser & Validator

Parse and validate .env files. Key-value pairs, comments, type checking.

DeveloperComing Soon

Enzyme Activity Calculator

Calculate enzyme activity (U/mL, specific activity). 100% private. 100% private.

EPUB Reader

Read EPUB ebooks in the browser — extract chapters, table of contents navigation, prev/next, font size + family, dark/light reading mode, search within text, bookmarks. 100% client-side.

EPUB to AZW3 Converter

Convert EPUB ebooks to AZW3/KF8 (Kindle Format 8) in the browser — pure JavaScript. Parses EPUB, generates AZW3 (PalmDB + KF8 header + HTML records + BOUNDARY marker) using the proven pdf-to-azw3 generator. Supports custom title/author, cover page, encoding, chapter detection. 100% client-side.

EPUB to MOBI Converter

Convert EPUB ebooks to MOBI format in the browser — pure JavaScript. Parses EPUB (ZIP + OPF + chapters), generates a MOBI file (PalmDB header + PalmDOC + MOBI + EXTH + text records) using the proven pdf-to-mobi generator. Supports custom title/author, chapter detection, UTF-8/CP1252 encoding. 100% client-side.

EPUB to PDF

Convert EPUB e-books to PDF. Preserve chapters, styling, table of contents.

EPUB to PDF

Convert EPUB e-books to PDF. Preserve chapters, styling, TOC.

Epub To Pdf Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

ER Diagram Designer (Diagram to SQL)

Visually design a database schema in the browser — add entities, columns, primary/foreign keys, and relationships — and generate clean CREATE TABLE DDL for PostgreSQL, MySQL, SQLite, and SQL Server. Topological creation-order output (handles circular FKs), per-dialect reserved-word auto-quoting, migration scripts by diffing two schema versions, DBML import/export, and round-trip with the SQL DDL to ER Diagram Generator (#267). 100% client-side, no signup.

ES Modules to CommonJS Converter

Convert import/export to require/module.exports. CJS syntax.

DeveloperComing Soon

ESLint Config Generator

Generate ESLint configurations. Flat config, rules, plugins, environments.

DeveloperComing Soon

Excel to CSV Converter

Convert XLSX files to CSV — pure-JS minimal XLSX parser (Office Open XML), no SheetJS dependency. Reads sharedStrings.xml, sheetN.xml, and styles.xml. Supports multiple sheets (select or convert all), cell types (string, number, date, boolean), and outputs CSV with proper RFC 4180 quoting. Download all sheets as a ZIP. 100% client-side.

Excel to JSON Converter

Convert XLSX files to JSON arrays of objects. Uses first row as keys, supports multiple sheets, JSONL output, and nested grouping. Pure JS — no SheetJS dependency.

Exit Code & Signal Reference

Decode any Unix exit code (0–255) including the 128+N signal rule (137 = SIGKILL, 139 = SIGSEGV, 143 = SIGTERM), with a complete bidirectional signal table (number ↔ name ↔ default action ↔ catchable), sysexits.h reference (EX_USAGE 64 … EX_CONFIG 78), reserved-range guidance, bash scripting snippets ($?, trap, set -e), Docker OOM 137 callout, and search by code OR signal name. 100% client-side — pure lookup, runs offline, no ads.

Expense Tracker

Track business expenses — categorize, total, and generate expense reports. CSV parser with validation, date range filter, category grouper, grand total, top expense, daily average, category percentages, tax-deductible markers, 9 category presets, 7 currency presets, sort options, text + CSV export, history (localStorage), shareable URL. 100% client-side.

Export PDF Form Data (FDF/XFDF/CSV)

Export PDF form field data to FDF, XFDF, or CSV formats.

Export PDF Form Data (FDF/XFDF/CSV)

Export PDF form field data to FDF, XFDF, or CSV formats.

Export PDF Form Data (FDF/XFDF/CSV)

Export PDF form field data to FDF, XFDF, or CSV formats.

Extract Attachments/Embedded Files from PDF

Extract all embedded files from PDF. Bulk, file type detection.

Extract Images from PDF

Extract all embedded images from PDF. JPEG, PNG, quality preservation, bulk export.

Extract Images from PDF Bulk

Extract all images from multiple PDFs. Bulk, format detection, ZIP export.

Extract Page Range from PDF

Extract a specific page range from PDF. Simple range selection.

Extract Page Range from PDF

Extract a specific page range from PDF. Simple selection.

Extract Pages from PDF

Extract specific pages from PDF into a new file. Range selection, preview.

Extract PDF Annotations/Comments

Extract all annotations and comments from PDF. Bulk export to JSON/CSV.

Extract PDF Annotations/Comments

Extract all annotations and comments from PDF. Bulk export to JSON/CSV.

Extract PDF Attachments

Extract embedded files/attachments from PDF. Bulk extraction, file type detection.

Extract PDF Pages

Extract specific pages or ranges from a PDF into a new file. Enter ranges like 1-3, 5, 8- and download only the pages you need. 100% private, runs in your browser.

Extract Text (PDF to TXT) Bulk

Extract text from multiple PDFs at once. Page range, bulk export.

Extract Text from PDF (PDF to TXT)

Extract text content from PDF. Page range, layout preservation, bulk export.

Faceted Nav SEO Analyzer

Analyze faceted navigation URLs for SEO issues: duplicate content risk, parameter bloat, and crawl waste. Groups URLs by base path, counts parameter combinations, detects >10-combination bloat, flags duplicate-content (same params, different order), and generates canonical + robots.txt recommendations. 100% client-side, 15 extra features.

Fake Data Generator (Faker)

Generate realistic-but-fake structured records in JSON, CSV, NDJSON, or SQL. 40+ field types (names, emails, phones, addresses, UUIDs, IPs, URLs, companies, lorem ipsum, dates, money, colors, ISBNs, semver). Batch generation, deterministic seed, schema editor, history. 100% client-side.

FAQ Schema Generator

Generate FAQPage schema.org JSON-LD for rich results. Add/remove Q&A pairs, bulk paste, character counters, validation, Google Rich Results test link, and HTML script-tag wrapper. 100% client-side.

Favicon Generator

Generate favicons in multiple sizes (16/32/48/64/128/180) from a single image. 100% private. 100% private.

Favicon Generator (multi-size)

Generate favicons in all sizes from a single source image. ICO, PNG, Apple touch icon, manifest.

Favicon Generator (multi-size)

Generate favicons in all sizes from a single source image. ICO, PNG, Apple touch, manifest.

Favicon Link Tag Generator

Generate favicon link tags for HTML. All sizes, Apple touch, manifest.

DeveloperComing Soon

FB2 Reader

Read FictionBook 2.0 (.fb2) ebooks in the browser — pure JavaScript XML parser. Extract title, author, genre, render book text as HTML, chapter navigation, table of contents, font size + theme. 100% client-side.

Fibonacci Sequence Generator

Generate Fibonacci numbers with fast-doubling algorithm. Custom start, count, and modulo. 100% private. 100% private.

File Encoding Detector

Detect file encoding (UTF-8, UTF-16 LE/BE, ASCII, Latin-1, Windows-1252, BOM presence) from bytes. Confidence scores, byte histogram, and 10+ extras. 100% private.

File Extension Changer

Batch change file extensions safely — add, remove, or replace extensions. Drag-drop multiple files, regex find/replace, case conversion, presets, conflict detection, undo, JSON export. 100% client-side.

File Hash Calculator

Calculate multiple hash algorithms for any file. MD5, SHA-1, SHA-256, SHA-512, CRC32.

DeveloperComing Soon

File Hash Checker

Compute MD5, SHA-1, SHA-256, SHA-512, and CRC32 checksums of any file. Verify against expected hash, parse SHASUMS files, batch hash multiple files, and export manifests. 100% client-side, unlimited size.

File Hash Validator

Compute SHA-1, SHA-256, SHA-384, SHA-512, MD5 hashes of any file via WebCrypto. Compare against expected hash. 100% client-side.

File Hash Verifier

Verify file integrity by computing and comparing hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512). Drag-drop, expected-hash input, batch mode, and 10+ extras. 100% private.

File Integrity Auditor

Create and verify SHA-256 hash manifests for folders — detect added, modified, or deleted files. Multi-algorithm support, exclude patterns, CSV/JSON export, manifest diff visualization. 100% client-side.

File Merger

Rejoin split file parts (.001, .002, ...) back into the original file. Auto-detect + sort by extension number, CRC32/SHA-256 checksum verification, missing-part detection, custom output name. 100% client-side.

File Metadata Stripper

Remove EXIF, GPS, XMP, IPTC, and PNG text chunks from JPEG, PNG, and WebP images without re-encoding pixel data. Batch process, before/after size, metadata summary, ZIP download. 100% client-side.

File Metadata Viewer

Inspect file metadata — size, type, last modified, MIME type, magic bytes, hex dump preview with offset, base64 preview, entropy, basic JPEG EXIF, and a file signature database. 100% client-side.

File Rename Utility

Batch rename files with pattern rules — find/replace, regex, sequential numbering (001, 002…), case conversion (upper/lower/title/kebab/camel), prefix/suffix, character cleanup, truncation, extension change. Live before/after preview and JSON export of the rename plan. 100% client-side.

File Splitter

Split any file into smaller parts by size or count — HJSplit-compatible naming (.001, .002, ...). CRC32 + SHA-256 checksum manifest, custom naming template, merge instructions, progress bar. 100% client-side.

File Tree Printer

Generate ASCII / Unicode file tree from a folder (via File System Access API or webkitdirectory). Customizable depth, filters, exclude patterns, and 10+ extras. 100% private.

File Type Detector

Detect true file type from magic bytes (signature), not extension. 200+ signatures, MIME type, extension suggestion, and 10+ extras. 100% private.

Fill PDF Forms

Fill existing PDF form fields. Auto-fill from JSON/CSV, bulk processing.

Fill PDF Forms

Fill existing PDF form fields. Auto-fill from JSON/CSV, bulk processing.

Fill PDF Forms

Fill existing PDF form fields. Auto-fill from JSON/CSV, bulk.

Find & Replace (Multi-pattern)

Find and replace multiple patterns in text. Regex support, CSV import.

DeveloperComing Soon

find Command Builder

Build correct find commands visually — path, name glob, type (f/d/l), size, time (mtime/mmin/newer), depth, permissions, owner, actions (print, exec \; / exec +, xargs, delete), boolean AND/OR/NOT with properly-escaped parentheses. Toggle GNU vs BSD/macOS variants. Per-option plain-English explanation, dangerous-action warnings (-delete/-exec rm), -print0/xargs -0 safe pattern, recipe library, history (max 20), shareable URL. 100% client-side — commands are generated, never executed.

Fixed-Point Q-Format Converter (Qm.n)

Convert between real numbers and fixed-point Qm.n representations (signed Qm.n or unsigned UQm.n) used in DSP, embedded, and FPGA work. Configurable integer bits (m) and fractional bits (n), three rounding modes (round-half-up, round-to-even, truncate), two overflow modes (saturate, wrap), live resolution (2^-n) and representable range, exact quantization error, raw stored integer in dec / hex / bin, a clickable bit grid with integer | fraction split, and presets (Q7, Q15, Q31, UQ8.8, UQ16.16). BigInt-correct, 100% client-side.

Flashcard Deck Organizer

Organize flashcards into decks, export to CSV/Anki, track review schedule. 100% private. 100% private.

Flashcard Importer

Import flashcards from CSV/TSV, export to Anki/Quizlet format. 100% private. 100% private.

Flashcard Maker & Study Mode

Create flashcards from term/definition pairs and study them with flip animation, shuffle, sequential and simplified SM-2 spaced-repetition modes. Multi-format parser (pipe, comma, tab, JSON), deck validator, Fisher-Yates shuffler, mark known/unknown, session + summary stats, CSV/JSON/TXT export, history (localStorage), shareable URL, card search filter, reverse mode, per-card tags, per-card difficulty, and 4 deck presets (Spanish vocab, US states, multiplication tables, periodic table). 100% client-side — no network.

Flatten PDF

Flatten a PDF by converting interactive form fields and annotations into static content. Prevents further editing of form data. 100% private, runs in your browser.

Font Lister & Embedder

List all fonts used in PDF. Embed missing fonts, subset existing ones.

Font Lister & Embedder

List all fonts used in PDF. Embed missing fonts, subset existing ones.

Font Lister & Embedder

List all fonts used in PDF. Embed missing fonts, subset.

Fraction Calculator

Add, subtract, multiply, divide fractions with simplification. 100% private. 100% private.

Free Proxy List Verifier

Verify proxy lists with format validation and connection test reference. 100% private. 100% private.

Fuel Cost Calculator

Calculate fuel consumption, cost per trip, MPG vs L/100km, and 10+ extras. 100% private.

GA4 Event Builder

Build Google Analytics 4 event tracking code. Generate gtag.js event calls, GTM dataLayer pushes, and Measurement Protocol payloads. Presets for page_view, scroll, click, form_start, form_submit, purchase. 100% client-side.

Gantt Chart Maker (ASCII + HTML)

Generate Gantt charts from a task list — ASCII and printable HTML versions. Parse tasks with start/end dates and progress, compute project duration, task offsets, durations, overlaps and weekend markers. Color presets (rainbow / blue-scale / priority-based), progress overlay, today marker. 18 extra features. 100% client-side.

Generate Bookmarks from Text Patterns

Create PDF bookmarks from text patterns. Heading detection, levels.

Geography Quiz Maker

Test your world geography with a built-in 150+ country database across 6 topics (capitals, currencies, languages, continents, populations, flag descriptions) and 8 regions (world + 7 continents). Generate multiple-choice or type-answer quizzes at 3 difficulty levels (easy = well-known countries, hard = obscure). Includes smart distractor generator (same-continent priority), case-insensitive fuzzy answer validator, score calculator, summary stats (accuracy, hardest region), text/HTML/CSV renderers (printable), country search/filter, flag description reference, history (localStorage), and shareable URL. 100% client-side — no network.

GIF Frame Extractor

Extract individual frames from animated GIF. 100% private. 100% private.

GIF Maker (from Images)

Create animated GIFs from multiple images. Frame delay, loop count, optimization, size reduction.

GIF Maker (from Images)

Create animated GIFs from multiple images. Frame delay, loop count, optimization.

GIF Maker from Images

Create animated GIF from multiple images with frame delay, loop count, and size control. 100% private. 100% private.

GIF Optimizer & Compressor

Optimize and compress animated GIFs. Reduce colors, remove duplicate frames, crop, resize.

GIF Optimizer & Compressor

Optimize and compress animated GIFs. Reduce colors, remove duplicate frames, resize.

GIF Optimizer Compressor

Optimize and compress animated GIFs with color reduction and frame removal. 100% private. 100% private.

GIF Resizer

Resize animated GIFs while preserving animation. Maintain aspect ratio or custom dimensions.

GIF Splitter (to Frames)

Split animated GIFs into individual PNG frames. Extract frame metadata, delays, disposal methods.

GIF Splitter (to Frames)

Split animated GIFs into individual PNG frames. Extract frame metadata, delays.

GIF Splitter to Frames

Split animated GIF into individual PNG frames with timing info. 100% private. 100% private.

Git Branch Naming Workflow Helper

Generate git branch names following conventions. feature/, bugfix/, release/, hotfix/.

DeveloperComing Soon

Git Command Builder & Cheatsheet

Build git commands visually. Commit, branch, merge, rebase, cherry-pick. Cheatsheet.

DeveloperComing Soon

Git Diff Viewer (Unified/Split)

View git diffs in unified or split format. Syntax highlighting, line numbers.

DeveloperComing Soon

Gitattributes Generator

Generate .gitattributes files. Line endings, binary files, export-ignore.

DeveloperComing Soon

GitHub Actions Workflow Generator

Generate GitHub Actions workflow YAML. Jobs, steps, matrix, secrets, triggers.

DeveloperComing Soon

GitHub Badge (shields.io) Generator

Build shields.io badge URLs with correct escaping — static and dynamic badges, brand presets, logo + style + named/hex color pickers, link wrapping, and Markdown/HTML/RST/AsciiDoc embed output. Coverage, npm version, downloads, license, GitHub stars/forks/issues, build status, custom badges, batch row builder, history (localStorage), shareable URL. 100% client-side.

Gitignore Generator

Generate .gitignore files for any language/framework. Templates.

DeveloperComing Soon

GitLab CI Config Generator

Generate GitLab CI/CD configuration. Stages, jobs, rules, artifacts, cache.

DeveloperComing Soon

Glob Pattern Tester

Test glob patterns against file paths with *, **, ?, [abc], [a-z], [!x], and {a,b} brace expansion. Convert glob to regex, explain each token, highlight matches, and resolve multi-pattern include/exclude sets. Four flavors: shell glob, .gitignore, minimatch/picomatch, and tsconfig. Toggle case-sensitivity, dot (hidden files), and globstar. Directory tree view, sample paths, presets, history (localStorage), and shareable URL. 100% client-side.

Google Business Profile Optimizer

Optimize your Google Business Profile (GBP). Score your description (length, category keyword, city mention, service keyword, call-to-action), generate GBP post templates (What's New / Offer / Event), suggest additional categories, plan required photos, suggest Q&A. Includes keyword density analyzer, 8 business-type presets (plumber, electrician, restaurant, dentist, lawyer, realtor, salon, gym), copy + download .txt + download CSV, history (localStorage), shareable URL. 100% client-side.

Google SERP Snippet Preview

Pixel-accurate preview of how your title, URL, and meta description will appear in Google search — desktop + mobile, with truncation warnings, rich elements (favicon, breadcrumb, date, rating, sitelinks, FAQ), and query keyword bolding. 100% client-side.

GPA Calculator

Calculate semester and cumulative GPA with course weights. 100% private. 100% private.

Grade Calculator

Calculate weighted grades, GPA on 4.0 scale, letter grades. 100% private. 100% private.

Grade Calculator & GPA Projector

Calculate course grades from weighted assignments, find the grade you need on remaining work to hit your target, and convert between percentage, letter grade, and GPA. Supports 4 grading scales (standard 10-point, plus-minus, pass-fail, custom), 4 GPA scales (4.0, 5.0, 10.0, 100%), what-if scenarios, weight validator, score validator, CSV/text export, history (localStorage), shareable URL. 100% client-side — no network.

Gradient Image Generator

Generate gradient images (PNG/JPG) from CSS gradients. Linear, radial, conic with custom stops.

Grammar Fixer

Fix common grammar errors: its/it's, their/there/they're, your/you're. 100% private. 100% private.

GraphQL Client Explorer

Explore GraphQL APIs. Introspection, query builder, variables, fragments.

DeveloperComing Soon

GraphQL Client Explorer

Explore GraphQL APIs. Introspection, query builder, variables, fragments.

DeveloperComing Soon

Gray Code Converter (Binary ↔ Gray, Sequence, N-ary, Balanced)

Convert between binary/decimal and reflected Gray code in both directions with XOR-step working, generate n-bit Gray-code sequences (0…2ⁿ−1) with the single-bit-change property highlighted, build n-ary and balanced Gray codes, and view the full truth table. BigInt support for wide values. 100% client-side & offline.

Grayscale/Black & White PDF

Convert PDF to grayscale or black & white. Reduce file size, print-friendly.

Grayscale/Black & White PDF

Convert PDF to grayscale or black & white. Print-friendly.

grep / ripgrep Command Builder

Build grep and ripgrep (rg) commands side-by-side from a visual UI. Toggle flags (ignore-case, whole-word, invert, count, line-numbers, recursive, fixed-string), choose regex flavor (BRE / ERE / PCRE / Rust regex), add file globs and context lines, then test the pattern against sample text live with the correct regex flavor. Per-flag plain-English explanation, grep↔rg translation table, recipe library, history (max 20), shareable URL. 100% client-side — your sample text never leaves the browser.

GST / VAT Calculator

Add or remove GST/VAT from any amount. Supports India (5/12/18/28%), UK (20%), Australia (10%), EU standard rates, custom rates, and 10+ extras. 100% private.

GTM & dataLayer Helper

Generate Google Tag Manager dataLayer code snippets. dataLayer.push code, custom event trigger config, GTM variable declarations, event presets (page_view, scroll, click, form_submit, purchase), JSON preview, validation, copy. History (localStorage), shareable URL. 100% client-side.

Guest Post Niche Site Finder

Find guest posting opportunities with Google search footprints. Generate search queries for write-for-us, guest post, contribute, submit-article. Niche input, query generator, Google search link, bulk queries, copy queries, stats, history (localStorage), shareable URL, niche presets. 100% client-side.

GZIP Compressor

Compress files to .gz format using the browser's native CompressionStream API. Batch compress multiple files, preserve original filenames, show before/after size comparison, and build .tar.gz archives (TAR + GZIP). 100% client-side — your files never leave the browser.

GZIP Decompressor

Decompress .gz files back to their original content using the browser's native DecompressionStream API. Extracts the original filename from the GZIP header, supports .tar.gz auto-extraction (TAR + GZIP), and detects MIME type from magic bytes. Batch decompress multiple .gz files. 100% client-side.

Gzip/Deflate Text Compressor

Compress text using gzip/deflate via CompressionStream API. Show before/after size.

DeveloperComing Soon

Hamming Code Error-Correction Calculator

Encode data bits into Hamming(7,4), Hamming(15,11), or Hamming(31,26) codes with parity at powers of two, decode received codewords via the syndrome, correct any single-bit error, and detect double-bit errors with SECDED extended Hamming. Interactive bit-flip error injection, per-parity-bit coverage display, even/odd parity mode, copy codeword, history (localStorage), and shareable URL. 100% client-side.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files, with hex and Base64 output. Uses Web Crypto — 100% private.

Hash Identifier

Identify hash type from length and format (MD5, SHA-1, SHA-256, bcrypt, etc). 100% private. 100% private.

Hashing Tool

Compute MD5, SHA-1, SHA-256/384/512 and HMAC all at once — for text or streamed files — 100% in-browser via WebCrypto. Includes input/output encoding, compare-to-expected, and security flags on broken hashes (MD5/SHA-1).

Hashing Tool (MD5, SHA-1, SHA-256)

Hash text/files with MD5, SHA-1, SHA-256, SHA-512. WebCrypto + pure JS MD5.

Hashtag Density Checker

Check hashtag count, density, and banned hashtag detection. 100% private. 100% private.

Hashtag Generator

Generate platform-specific hashtags for Instagram, Twitter/X, LinkedIn, TikTok, and YouTube. 5 variation types (direct, compound, variations, community, trending-style), categorizer (popular/medium/niche), mix generator (30/40/30 ratio), spam filter, branded + niche generators, validator, density analyzer, 10+ trending niches, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Heading Structure Analyzer

Extract H1-H6 from HTML, view the heading outline as a tree, count per-level, and detect SEO issues: multiple H1s, missing H1, skipped levels, long headings, and empty headings. Export as markdown. 100% client-side.

Headline Analyzer

Analyze headlines for power words, emotion, balance, length, and SEO score. 100% private. 100% private.

Heap & Priority Queue Visualizer

Step-by-step visualization of a binary heap (min or max) with synchronized tree + array views and live index math (parent=(i-1)/2, children=2i+1/2i+2). Insert with sift-up, extract with sift-down, build-heap (heapify) in O(n), peek / size / height, priority-queue operations (change-priority, decrease-key, increase-key), one-click heapsort demo, build-heap vs n-inserts comparison, step / reverse / play / speed controls, and shareable state URLs. 100% client-side.

Helm Values YAML Helper

Generate and validate Helm values.yaml files. Templates, charts, overrides.

DeveloperComing Soon

Hex Dump Viewer & Editor (with Data Inspector)

Display binary data as a classic hex dump (offset | hex bytes | ASCII gutter) with in-place editing, byte insert/delete with undo, search by hex bytes / ASCII text / regex, goto offset, multi-format display (hex / decimal / binary / octal), a data inspector decoding int8/16/32/64 (signed & unsigned), float32/64, LEB128, and strings (ASCII / UTF-8 / UTF-16) at the cursor in both endiannesses, and file import via ArrayBuffer. 100% client-side, nothing uploaded.

Hex Encode/Decode

Encode/decode text as hexadecimal. UTF-8 safe, with byte separator options.

DeveloperComing Soon

HEX RGB HSL Converter

Convert between HEX, RGB, HSL, HSV color formats. Color picker, palette generator, WCAG check.

Hex to Base64 Converter

Convert between hexadecimal and Base64 formats. Bidirectional, UTF-8 safe.

DeveloperComing Soon

Hex to Text Converter

Convert hex string to ASCII text. 100% private. 100% private.

Hex Viewer

Inspect any file's bytes in a hex dump with ASCII sidebar. Configurable bytes per line (8/16/32), search by hex or ASCII string, jump to offset, endian swap view, entropy per chunk, and download the hex dump as text. 100% client-side.

Hexadecimal Calculator

Add, subtract, multiply, divide hex numbers with decimal conversion. 100% private. 100% private.

Hidden Characters Detector

Detect zero-width chars, BOM, control chars, and Unicode steganography in text. 100% private. 100% private.

History Timeline Maker

Build visual history timelines from pipe-separated events. Parse year, year-month, full date and BC/AD dates, sort chronologically or reverse, group by category, color-code events (rainbow / mono / category schemes), render as ASCII vertical timeline, HTML (printable), Markdown, or CSV. Compute spans between events, search/filter, summary stats (date range, by-category counts), era calculator (1945 → 20th century), event importance markers (1–5 stars), 4 timeline presets (WWII, American Revolution, Ancient Egypt, Renaissance), history (localStorage), and shareable URL. 100% client-side — no network.

HMAC Generator

Generate HMAC signatures using WebCrypto. HMAC-SHA256, SHA384, SHA512 support.

DeveloperComing Soon

How-To Schema Generator

Generate HowTo schema.org JSON-LD for step-by-step guides. Add steps, supplies, tools, total time, estimated cost, per-step images, reordering, and live preview. Includes Google Rich Results test link. 100% client-side.

Hreflang Tag Generator

Generate hreflang link tags for international SEO. Add language/region pairs (en-US, en-GB, fr-FR), x-default tag, ISO 639-1 language picker, ISO 3166-1 region picker, duplicate detection, and batch input. 100% client-side.

HSTS Preload Checker & Header Generator

Check HSTS preload eligibility and generate Strict-Transport-Security headers with proper directives.

NetworkComing Soon

HSTS Preload Checker & Header Generator

Check HSTS preload eligibility and generate Strict-Transport-Security headers.

htaccess Rules Generator

Generate Apache .htaccess rules for redirects, auth, and security. 100% private. 100% private.

HTML Beautifier

Format and beautify HTML with configurable indent, line wrapping, and attribute sorting.

DeveloperComing Soon

HTML Email CSS Inliner

Inline CSS styles into HTML for email compatibility. Style tag to inline conversion.

DeveloperComing Soon

HTML Entity Decoder

Decode HTML entities back to characters. 100% private. 100% private.

HTML Entity Encode/Decode

Encode/decode HTML entities including named, decimal, and hex references.

DeveloperComing Soon

HTML Entity Reference

Reference for all HTML entities. Named, decimal, hex, common symbols.

DeveloperComing Soon

HTML Escape/Unescape

Escape/unescape HTML entities. < > & " ' conversion.

DeveloperComing Soon

HTML Form Builder

Build HTML forms visually. Input types, validation, labels, accessibility attributes.

DeveloperComing Soon

HTML Image Extractor

Extract all image URLs and alt text from HTML. Bulk download option.

DeveloperComing Soon

HTML Link Extractor

Extract all links (href) and anchor text from HTML. Internal/external classification.

DeveloperComing Soon

HTML Live Preview Editor

Edit HTML/CSS/JS with live preview. Side-by-side code and rendered output.

DeveloperComing Soon

HTML Minifier

Minify HTML by removing whitespace, comments, and redundant attributes. Gzip estimate.

DeveloperComing Soon

HTML Table Generator

Generate HTML tables from CSV/JSON data or visual editor. Headers, styling, accessibility.

DeveloperComing Soon

HTML Table to CSV Converter

Extract tables from HTML and convert to CSV. Multiple table support.

DeveloperComing Soon

HTML to JSX Converter

Convert HTML to JSX syntax. className, self-closing tags, style objects.

DeveloperComing Soon

HTML to Markdown Converter

Convert HTML to Markdown. Preserve headings, lists, links, images, code blocks.

DeveloperComing Soon

HTML to PDF

Convert HTML content to a PDF document. Renders HTML with basic CSS styling, then rasterizes to PDF. 100% private, runs in your browser.

HTML to Plain Text

Strip HTML tags and convert to plain text. Preserve line breaks and basic formatting.

DeveloperComing Soon

HTML to Pug Converter

Convert HTML to Pug/Jade template syntax. Indentation-based, concise.

DeveloperComing Soon

HTML to Text Ratio Checker

Analyze HTML-to-text ratio for SEO. Extract visible text, compute ratio, count words/tags/scripts/images, get SEO recommendations and a 0-100 score. 100% client-side.

HTML Validator

Validate HTML syntax against HTML5 spec. Detect unclosed tags, mismatched attributes.

DeveloperComing Soon

HTML5 Boilerplate Generator

Generate HTML5 boilerplate with meta tags, Open Graph, favicons, and PWA manifest.

DeveloperComing Soon

HTML5 Semantic Checker

Check HTML5 semantic structure. Header, nav, main, article, section, aside, footer.

DeveloperComing Soon

HTTP Header Parser

Parse HTTP headers, validate format, show security recommendations. 100% private. 100% private.

HTTP Headers Reference & Analyzer

Reference for all HTTP headers. Analyze request/response headers, security, caching.

HTTP Security Headers Test

Test HTTP security headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy).

NetworkComing Soon

HTTP Status Code Reference

Searchable reference for all HTTP status codes with common causes, how-to-fix guides, IANA links, server-software mapping (nginx/Cloudflare/Apache), HTTP/2 vs HTTP/1.1 differences, quiz mode, and CSV/Markdown export. 100% offline.

IBAN Generator & Validator

Generate valid test IBANs for 70+ countries and validate/decode any IBAN with MOD-97 checksum, per-country length rules, BBAN structural breakdown, batch processing, and print/electronic formatting. 100% client-side — test/sandbox IBANs only, structurally valid but unassigned.

IEEE 754 Floating-Point Converter (binary16 / 32 / 64 / 128)

Convert between decimal and IEEE 754 binary representations (binary16 half, binary32 single, binary64 double, binary128 quad). Show sign / exponent / mantissa bit fields, the exact stored value via BigInt, absolute & relative rounding error, classification (normal / subnormal / ±0 / ±inf / qNaN / sNaN), a clickable bit grid, ULP next/previous stepping, hex-float parsing (0x1.8p+1), and side-by-side precision comparison. 100% client-side, BigInt-correct for all four widths.

iFrame Generator

Generate HTML iframe tags. Src, width, height, sandbox, loading.

DeveloperComing Soon

Image Anaglyph 3D Maker

Create red-cyan anaglyph 3D images from two source images. 100% private. 100% private.

Image Annotation Tool

Annotate images with arrows, text, shapes, and highlights. Export annotated image. 100% private. 100% private.

Image Background Changer

Change image background color. Remove background (simple threshold), replace with solid color.

Image Background Remover (Simple)

Remove a solid-color background by flood-filling from the corners. Pure Canvas API, 100% private, no uploads.

Image Bloom Effect

Add soft glow bloom effect with threshold and intensity. 100% private. 100% private.

Image Blur Tool

Apply a Gaussian-style blur to images using a fast box-blur approximation. 100% private Canvas API processing.

Image Border Adder

Image Border Adder with Canvas API. 100% private — runs in your browser.

Image Brightness & Contrast Editor

Adjust image brightness, contrast, exposure, and gamma. Real-time preview with histogram.

Image Brightness Adjuster

Adjust image brightness from -100 to +100. Pure Canvas API processing, 100% private, no uploads.

Image Caption Adder

Add text captions with position, font, color, background, and outline. 100% private. 100% private.

Image Cartoonizer

Convert photos to cartoon style with edge detection and color quantization. 100% private. 100% private.

Image Channel Mixer

Image Channel Mixer with Canvas API. 100% private — runs in your browser.

Image Charcoal Drawing

Apply charcoal drawing effect with stroke direction. 100% private. 100% private.

Image CLAHE Tool

Apply Contrast Limited Adaptive Histogram Equalization. 100% private. 100% private.

Image Collage Maker

Combine multiple images into a grid collage with adjustable columns, gaps and background. 100% private Canvas API.

Image Color Extractor

Extract dominant colors from an image using a lightweight k-means quantization. 100% private, no uploads.

Image Color Inverter

Invert image colors to create a photographic negative effect. Pure Canvas API, 100% private, no uploads.

Image Color Overlay

Apply solid color overlay with blend modes (multiply/screen/overlay). 100% private. 100% private.

Image Color Picker

Pick colors from any pixel in an image. Get hex, RGB, HSL values. 100% private. 100% private.

Image Color Picker (Eyedropper)

Pick colors from any image. Click to sample, hex/RGB/HSL output, palette history.

Image Compressor

Compress and convert JPG/PNG/WebP images with live quality preview, resize, EXIF strip, and bulk download as ZIP. 100% private — images never leave your browser.

Image Contrast Adjuster

Adjust image contrast from -100 to +100. Pure Canvas API processing, 100% private, no uploads.

Image Cropper

Crop images to a custom rectangle with adjustable x, y, width and height. 100% client-side Canvas API, no uploads.

Image Crosshatch Effect

Convert image to crosshatch drawing. 100% private. 100% private.

Image Dehaze Tool

Remove haze/fog from images using dark channel prior. 100% private. 100% private.

Image Diff Compare Tool

Compare two images side-by-side, overlay, and pixel-diff with heatmap. 100% private. 100% private.

Image Dimensions Inspector

Inspect image dimensions, file size, format, color depth, and EXIF data. 100% private. 100% private.

Image Dither Tool

Apply Floyd-Steinberg, ordered, and random dithering. 100% private. 100% private.

Image Dot Pattern Effect

Convert image to halftone dot pattern. 100% private. 100% private.

Image Drawing Markup Tool

Draw and annotate images. Pen, arrow, rectangle, ellipse, text, highlighter with color control.

Image Droste Effect

Droste effect (picture-in-picture recursion) on images. 100% private. 100% private.

Image Duotone Maker

Apply duotone effect with two custom colors. 100% private. 100% private.

Image Edge Detector

Image Edge Detector with Canvas API. 100% private — runs in your browser.

Image Emboss Tool

Emboss effect with directional control and depth. 100% private. 100% private.

Image Exposure Adjuster

Adjust exposure -2 to +2 stops with gamma correction. 100% private. 100% private.

Image Filter Effects (Sepia/Grayscale)

Apply CSS-style filters to images: sepia, grayscale, blur, brightness, contrast, hue-rotate.

Image Fisheye Effect

fisheye lens distortion effect with barrel/pincushion modes. 100% private. 100% private.

Image Flipper

Flip images horizontally, vertically, or both. Pure Canvas API, 100% private, no server uploads.

Image Format Converter (PNG/JPG/WebP/AVIF)

Convert images between PNG, JPG, WebP, AVIF, GIF, BMP. Quality control, batch processing.

Image Fractal Generator

Generate Mandelbrot/Julia fractal images. 100% private. 100% private.

Image Frame Maker

Add decorative frames: classic, polaroid, film strip, rounded. With color and size control. 100% private. 100% private.

Image Gamma Corrector

Apply gamma correction (0.1-10.0) for brightness adjustment. 100% private. 100% private.

Image Glitch Art Generator

Generate glitch art effects: pixel sort, channel shift, datamosh. 100% private. 100% private.

Image Gradient Maker

Image Gradient Maker with Canvas API. 100% private — runs in your browser.

Image Grayscale Converter

Convert images to grayscale using the ITU-R BT.601 luminance formula. 100% private Canvas API processing.

Image Halftone Generator

Apply halftone dot pattern with adjustable dot size, angle, and screen ruling. 100% private. 100% private.

Image Histogram Viewer

View RGB+luminance histograms with stats, clipping warnings, and curve overlay. 100% private. 100% private.

Image Hue Rotator

Rotate image hue 0-360 degrees using HSL conversion. Pure Canvas API processing, 100% private, no uploads.

Image Kaleidoscope Effect

Apply kaleidoscope symmetry effect with N segments. 100% private. 100% private.

Image Lens Flare Effect

Add realistic lens flare with position, intensity, and color control. 100% private. 100% private.

Image Metadata (EXIF) Stripper

Strip EXIF metadata from images (GPS, camera info, timestamps). Privacy protection.

Image Metadata (EXIF) Viewer

View EXIF metadata from images. Camera, lens, GPS, settings, timestamps. Export to JSON/CSV.

Image Mosaic Blend

Blend multiple images into a mosaic with fade transitions. 100% private. 100% private.

Image Neon Glow Effect

Add neon glow outline with color and spread control. 100% private. 100% private.

Image Noise Reducer

Image Noise Reducer with Canvas API. 100% private — runs in your browser.

Image Oil Paint Effect

Apply oil painting effect with brush size and coverage. 100% private. 100% private.

Image Old Photo Effect

Apply vintage old photo effect with sepia+vignette+grain. 100% private. 100% private.

Image Pencil Sketch

Convert image to pencil sketch with grayscale + edge detection. 100% private. 100% private.

Image Pixel Sorter

Sort pixels by brightness/hue/saturation for artistic effects. 100% private. 100% private.

Image Pixelate Tool

Image Pixelate Tool with Canvas API. 100% private — runs in your browser.

Image Placeholder Generator

Generate placeholder images with custom size, color, text. 100% private. 100% private.

Image Placeholder Generator

Generate placeholder images with text, dimensions, and colors. Like placeholder.com offline.

Image Plasma Effect

Generate plasma fractal effect on image. 100% private. 100% private.

Image Posterize Tool

Image Posterize Tool with Canvas API. 100% private — runs in your browser.

Image Rainbow Noise

Add colorful rainbow noise to image. 100% private. 100% private.

Image Resizer

Resize images to custom width and height with optional aspect-ratio lock. Pure Canvas API, 100% private — no uploads.

Image Rotator

Rotate images 90, 180, 270 or any custom degrees. Pure Canvas API, 100% client-side, no uploads.

Image Rotator & Flipper

Rotate images (90/180/270/custom) and flip (horizontal/vertical). Bulk processing.

Image Round Corners

Image Round Corners with Canvas API. 100% private — runs in your browser.

Image Saturation & Hue Editor

Adjust image saturation, hue, vibrance, and temperature. Real-time preview.

Image Saturation Adjuster

Adjust image saturation from -100 (grayscale) to +100 (vivid). Pure Canvas API processing, 100% private.

Image Screen Tone Effect

Apply screen tone (manga-style) dot pattern. 100% private. 100% private.

Image SEO & Alt Text Auditor

Audit image alt text from HTML for SEO and accessibility. Extract <img> tags, flag missing/empty/too-long/too-short/non-descriptive alt, compute stats, generate CSV and Markdown reports, and list WCAG issues. 100% client-side.

Image Sepia Filter

Apply a classic sepia tone to images using the standard sepia color matrix. 100% private Canvas API processing.

Image Shadows & Highlights

Adjust shadows and highlights independently. 100% private. 100% private.

Image Sharpen Tool

Sharpen images using unsharp mask. Radius, amount, threshold control for precise sharpening.

Image Sharpener

Sharpen images using a 3×3 convolution kernel with adjustable strength. 100% private Canvas API processing.

Image Solarize Tool

Solarize effect (Sabattier effect) with threshold control. 100% private. 100% private.

Image Splitter

Split image into rows/columns grid of separate images. 100% private. 100% private.

Image Sprite Sheet Generator

Generate CSS sprite sheets from multiple images. Automatic layout, CSS output, padding control.

Image Starry Night Effect

Apply Van Gogh starry night swirl effect. 100% private. 100% private.

Image Steganography (Hide Text)

Hide text messages inside images using LSB (Least Significant Bit) steganography. Password protection.

Image Steganography Decoder

Extract hidden text from steganographic images. LSB decoding with optional password.

Image Stitcher

Stitch multiple images horizontally or vertically into one. 100% private. 100% private.

Image Text (Caption) Adder

Add text captions to images. Font, size, color, position, shadow, stroke control.

Image Thermal Camera Effect

Simulate thermal camera with heat map color palette. 100% private. 100% private.

Image Threshold Tool

Image Threshold Tool with Canvas API. 100% private — runs in your browser.

Image Thumbnail Maker

Generate image thumbnails at multiple sizes (64, 128, 256, 512). Pure Canvas API processing, 100% private.

Image Tile Maker

Split image into a grid of tiles for seamless textures. 100% private. 100% private.

Image to ASCII (B&W)

Convert image to black and white ASCII art with custom charset. 100% private. 100% private.

Image to Base64

Convert image files to Base64 data URLs for inline embedding. 100% private — runs entirely in the browser.

Image to Base64 Encoder

Encode images to Base64 data URLs. Multiple output formats (raw, HTML, CSS, JSON, favicon).

Image to PDF (JPG/PNG)

Convert images to PDF. JPG, PNG, WebP, GIF, bulk, page size, orientation.

Image to PDF (JPG/PNG)

Convert images to PDF. JPG, PNG, WebP, GIF, bulk, page size.

Image to SVG (Vectorizer)

Convert raster images (PNG/JPG) to SVG vector. Edge detection, color quantization, path tracing.

Image TV Static Effect

Add TV static noise overlay. 100% private. 100% private.

Image Upscaler

Upscale images with Lanczos/bilinear interpolation and sharpening. 100% private. 100% private.

Image Vignette Tool

Image Vignette Tool with Canvas API. 100% private — runs in your browser.

Image Watercolor Effect

Apply watercolor painting effect with edge softening. 100% private. 100% private.

Image Watermark Adder

Add a text watermark to images with custom position, opacity, font size and color. 100% private — no uploads.

Images to PDF

Convert JPG or PNG images into a single PDF. Control page size, orientation, and margins. Reorder images before converting. 100% private, runs in your browser.

Import Dependency Graph Visualizer

Visualize import dependency graphs. Detect circular deps, unused modules.

DeveloperComing Soon

Import Fill PDF Form Data

Import FDF/XFDF/CSV data into PDF form fields. Bulk fill.

Import/Fill PDF Form Data

Import FDF/XFDF/CSV data into PDF form fields. Bulk fill.

Import/Fill PDF Form Data (FDF/XFDF/CSV)

Import FDF/XFDF/CSV data into PDF form fields. Bulk fill.

In-Browser SQL Playground

Run SQL entirely in your browser — no server, no signup, no data leaving the device. A pure-JS SQL engine executes CREATE TABLE, INSERT, and SELECT (WHERE, JOIN, GROUP BY, HAVING, ORDER BY, LIMIT, DISTINCT) against in-memory tables. Export results as CSV/JSON/Markdown. Schema browser, sample datasets, query history, shareable URL. 100% client-side.

Index Coverage Reporter

Audit URL indexability: classify each URL as indexable / canonicalized / noindex / robots_blocked / error_status / duplicate_canonical. Detect canonical chains, missing canonicals, duplicate canonical targets. Generate recommendations. CSV import/export, history, shareable URL. 100% client-side — paste CSV of URL metadata and get an instant coverage report.

Influencer Rate Calculator

Calculate influencer rates based on followers, engagement, platform. 100% private. 100% private.

Insert Blank Pages into PDF

Insert blank pages into PDF at specific positions. Custom size.

Insert Blank Pages into PDF

Insert blank pages into PDF at specific positions. Custom size.

Insert PDF Pages

Insert pages from a second PDF into your main PDF at any position. Choose where to insert and which pages from the source. 100% private, runs in your browser.

Insert/Add Pages to PDF

Insert blank pages or pages from another PDF. Position, count, source.

Insert/Add Pages to PDF

Insert blank pages or pages from another PDF. Position, count, source.

Instagram Grid Splitter

Split image into Instagram grid (3x1, 3x3, 3x9) with download all tiles. 100% private. 100% private.

Instagram Story Planner

Plan Instagram story sequences with text overlays, stickers, polls, and questions. 7 story-type templates (announcement, tutorial, behind-the-scenes, Q&A, poll, list, story-time), 4 tones (casual, professional, playful, urgent), 6 sticker types (poll, question, link, location, mention, hashtag), slide text-overlay generator, story sequence validator (hook + CTA), story flow checker, slide count calculator, poll/question/link slide generators, slide duration calculator (3-15 sec), music suggestion per story type, 2 alt-variations, summary stats, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Integer Data Type Range & Overflow Reference

Reference table for integer types (int8, uint8, int16, …, int64, uint64, size_t, intptr_t, byte, char, short, long, i32, u64, isize, usize) across C/C++, Rust, Go, Java, C#, JavaScript and Python. Show min/max (BigInt-exact), bit width, overflow behavior, format specifiers and copyable language constants. Interactive overflow calculator — enter a value and a type, see whether it fits and exactly how it wraps/saturates/panics/errors per language. 100% client-side, no network.

Interleave PDF Pages

Merge two PDFs by alternating pages: page 1 from PDF A, page 1 from PDF B, page 2 from A, page 2 from B, and so on. Perfect for combining front/back scans. 100% private.

Internal Linking Suggester

Suggest internal links between pages based on keyword matches. Anchor text, relevance scores, dedup, export as HTML or markdown, stats, history, shareable URL. 100% client-side.

International SEO Planner

Plan international SEO: choose ccTLD vs subdomain vs subdirectory strategy, generate hreflang tags, validate pairs, get x-default, and compare URL structures. 100% client-side — 17 extras including 20+ country ccTLD lookup, ISO validators, history, shareable URL.

Inventory Forecast

Forecast inventory needs based on usage trends. 100% private. 100% private.

Inventory Reorder Calculator

Calculate reorder points, safety stock, and EOQ (Economic Order Quantity). 100% private. 100% private.

Inventory Tracker

Track stock levels, reorder points, valuation (FIFO/LIFO/AVG). 100% private. 100% private.

Invert PDF Colors (Dark Mode)

Invert PDF colors for dark mode reading. White text on black background.

Invert PDF Colors (Dark Mode)

Invert PDF colors for dark mode reading. White on black.

Invoice Generator (PDF/HTML/Text)

Generate professional PDF invoices with line items, discount, tax, and totals. Enter from/to details, line items, tax rate, discount and currency — export as PDF (pdf-lib), printable HTML, plain text, or CSV. 18 extra features: line parser, totals calc, discount applier, tax calculator, grand total, 7 currency presets, tax presets, Net 15/30/60 due-date presets, invoice number auto-suggest, history (localStorage), shareable URL, summary stats. 100% client-side.

Invoice Template Generator

Generate professional invoices with line items, tax, terms, and PDF export. 100% private. 100% private.

IP Address Format Converter

Convert an IPv4 address between dotted-decimal, 32-bit integer, hexadecimal (0xC0A80001), octal, dotted-binary, dotted-hex and dotted-octal with a per-octet breakdown. Convert IPv6 between its 128-bit integer, hex, expanded and RFC 5952 compressed forms. Auto-detect the input format (0x/0b/0 prefixes, mixed dotted-hex like 0xC0.0xA8.0.1) and batch-convert lists. 100% client-side with BigInt 128-bit math.

IP Geolocation Tool

Geolocate any IP address. City, region, country, timezone, ISP, ASN. Offline bundled database.

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IP Subnet Calculator

IPv4 + IPv6 subnet calculator with CIDR/mask notation, VLSM subnetting, range↔CIDR conversion, CIDR merge, containment check, PTR lookup, wildcard mask, binary view, and CSV/JSON export. 100% client-side.

IPv4 Range Splitter

Split IP ranges into individual CIDR blocks. 100% private. 100% private.

IPv4 Subnet Calculator (CIDR / VLSM)

Compute network, broadcast, first/last usable host, host count, subnet & wildcard mask, IP class, and private/reserved detection from an IPv4 address + CIDR (or dotted / inverse mask). Includes binary bit visualization, even split into N subnets, VLSM best-fit allocation from host requirements, overlap / containment checker between two blocks, and CSV / JSON export. 100% client-side.

IPv6 Expander, Compressor & Validator

Expand a compressed IPv6 address to its full 128-bit form, compress a full address to its RFC 5952 canonical short form, validate it, and see exactly which rules were applied (leading-zero removal, '::' run selection). Get every valid representation, classify the address type (loopback, link-local, ULA, multicast, global, IPv4-mapped, unspecified), and batch-process lists. Handles embedded IPv4 (::ffff:192.0.2.1) and zone IDs (%eth0). 100% client-side with BigInt 128-bit math.

IPv6 Subnet Calculator

Calculate IPv6 subnets, CIDR, range, reverse DNS. 100% private. 100% private.

IPv6 Subnet Calculator

Compute IPv6 network address, first/last address, total address count (BigInt-exact) and number of /64s from an address + prefix length. Expand and compress addresses (RFC 5952 canonical form), show the 128-bit binary representation with nibble markers, subdivide a prefix into smaller child prefixes (e.g. /48 → /56 → /64), and generate the ip6.arpa reverse DNS zone. 100% client-side with BigInt 128-bit math.

ISBN Generator & Validator

Generate valid test ISBN-10 and ISBN-13 numbers with correct check digits, validate any ISBN with structural reason codes, convert ISBN-10 ↔ ISBN-13 (978/979 handling), parse ISBNs into prefix/group/publisher/title/check components with range-table hyphenation, and bulk-process up to 5k rows. 100% client-side — test ISBNs only, structurally valid but unregistered.

ISO 8601 Date Parser & Formatter

Parse any ISO 8601 / RFC 3339 string into its components and format a date into every ISO 8601 variant — calendar, week, ordinal, datetime, duration, interval, recurring. Forgiving tokenizer accepts basic + extended format, comma or dot decimals, Z or offset, negative/expanded years, leap seconds, 24:00:00, week 53. Strict vs lenient modes. Code snippets in JS/Python/Java/Go. 100% client-side.

ISO Extractor

Extract files from ISO 9660 disk images in the browser — pure JavaScript sector-based reader. Parse Primary Volume Descriptor, list root directory, navigate directories, extract individual files. Supports Joliet extension. 100% client-side.

JAR Extractor

Extract and inspect Java JAR files in the browser — pure JavaScript JAR (ZIP) parser. Parse META-INF/MANIFEST.MF, list class files, detect Main-Class, view manifest attributes, extract individual files or all as ZIP. 100% client-side.

JavaScript Beautifier

Format and beautify JavaScript code. Indent, semicolons, quote style.

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JavaScript Beautifier

Format and beautify JavaScript code. Indent, semicolons, quote style.

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JavaScript Beautifier & Formatter

Format and beautify JavaScript code. Indent, semicolons, quotes.

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JavaScript Bundle Size Analyzer

Analyze JavaScript bundle size. Import tree, minified+gzip estimates.

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JavaScript Bundle Size Analyzer

Analyze JavaScript bundle size. Import tree, minified+gzip estimates.

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JavaScript Code Complexity Analyzer

Analyze cyclomatic complexity of JavaScript functions. Halstead metrics.

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JavaScript Deobfuscator

Deobfuscate minified JavaScript. Beautify, rename variables, decode strings.

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JavaScript Linter (In-Browser)

Lint JavaScript code in browser. ESLint rules, fix suggestions.

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JavaScript Linter (In-Browser)

Lint JavaScript code in browser. ESLint rules, fix suggestions.

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JavaScript Minifier

Minify JavaScript. Remove whitespace, comments, shorten variables.

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JavaScript Minifier

Minify JavaScript. Remove whitespace, comments, shorten variables.

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JavaScript Obfuscator

Obfuscate JavaScript code. Variable renaming, string encoding, control flow.

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JavaScript Obfuscator

Obfuscate JavaScript code. Variable renaming, string encoding, control flow.

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JavaScript Playground/REPL

Run JavaScript code in browser. Console output, error reporting, examples.

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JavaScript Playground/REPL

Run JavaScript code in browser. Console output, error reporting, examples.

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JavaScript SEO Render Tester

Test JavaScript SEO rendering by analyzing HTML snippets and JS file lists. Detects render-blocking scripts (head scripts without async/defer), counts external vs inline scripts, simulates DOM mutation to find missing <title>/<meta description>/<h1>, and generates a 0-100 render score with 6+ recommendation rules. 100% client-side, 15 extra features.

JavaScript to TypeScript Converter

Convert JavaScript to TypeScript. Add types, interfaces, fix any types.

JavaScript to TypeScript Converter

Convert JavaScript to TypeScript. Add types, interfaces, fix any types.

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JavaScript Unit Test Runner

Run JavaScript unit tests in browser. Assert, describe, it, expect.

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jq Playground & Filter Builder

A pure-JavaScript jq playground: paste JSON, type or build a jq filter visually, see the transformed output instantly. Built-in jq interpreter (no WASM, no network) supporting identity, field access, array iteration, select, map, sort, sort_by, group_by, keys, values, length, to_entries, from_entries, pipe, array/object constructors, arithmetic, comparisons, recursive descent, unique, has, contains, first/last, and limit. Visual filter builder (select fields, filter, map, sort, group), per-step plain-English explanation, sample JSON, flag toggles (-c, -r, -s, -S), shareable URL, history. 100% client-side.

JS Object to JSON Converter

Convert JavaScript object literals to JSON. Quote keys, remove trailing commas.

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JS Object to JSON Converter

Convert JavaScript object literals to JSON. Quote keys, remove commas.

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JSDoc Comment Generator

Generate JSDoc comments from JavaScript functions. Params, returns, types.

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JSDoc Comment Generator

Generate JSDoc comments from JavaScript functions. Params, returns.

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JSON Diff & Compare

Compare two JSON objects and highlight differences. Deep diff with path tracking.

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JSON Escape/Unescape

Escape/unescape JSON strings. Handle quotes, backslashes, control characters, unicode.

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JSON Flattener/Unflattener

Flatten nested JSON to dot-notation keys and back. Useful for form data and spreadsheets.

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JSON Flattener/Unflattener

Flatten nested JSON to dot-notation keys and back. Useful for form data.

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JSON Flattener/Unflattener

Flatten nested JSON to dot-notation keys and back.

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JSON Formatter

Format, validate, minify, and sort JSON — fully in your browser.

JSON Key Sorter

Sort JSON object keys alphabetically or custom order. Recursive sorting option.

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JSON Minifier

Minify JSON by removing whitespace, comments, and unnecessary characters. Gzip estimate.

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JSON Schema Generator

Generate JSON Schema from JSON data. Draft 7, 2020-12, with type inference.

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JSON Schema Validator

Validate JSON against a JSON Schema. Draft 7, 2020-12 support with detailed errors.

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JSON to C# Class Converter

Convert JSON to C# class definitions with properties and attributes.

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JSON to CSV Converter

Convert JSON arrays/objects to CSV. Nested object flattening, custom delimiters.

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JSON to Excel Converter

Convert JSON data to XLSX format — supports flat JSON, nested objects (dot-notation flattening), and JSONL (JSON Lines). Auto-detects columns from the first object, infers cell types (string, number, boolean, date), and generates XLSX with typed cells. Batch convert multiple JSON files into a multi-sheet workbook. 100% client-side.

JSON to Go Struct Converter

Convert JSON to Go struct definitions with proper types and tags.

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JSON to GraphQL Schema

Convert JSON data to GraphQL schema definitions. Types, inputs, queries, mutations.

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JSON to Java POJO

Convert JSON to Java POJO classes. Getters, setters, builders, Lombok support.

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JSON to Java POJO

Convert JSON to Java POJO classes. Getters, setters, builders, Lombok.

JSON to Java POJO

Convert JSON to Java POJO classes. Getters, setters, Lombok.

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JSON to JS Object Literal

Convert JSON to JavaScript object literal syntax. Quote keys, trailing commas.

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JSON to JS Object Literal Converter

Convert JSON to JavaScript object literal. Unquoted keys, trailing commas.

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JSON to Kotlin Data Class

Convert JSON to Kotlin data classes. Null safety, default values, Gson/Moshi.

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JSON to Kotlin Data Class

Convert JSON to Kotlin data classes. Null safety, default values, Gson/Moshi.

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JSON to Kotlin Data Class

Convert JSON to Kotlin data classes. Null safety, Gson/Moshi.

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JSON to Python Class

Convert JSON to Python dataclasses or Pydantic models. Type hints, defaults.

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JSON to Python Class

Convert JSON to Python dataclasses or Pydantic models. Type hints.

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JSON to Python Class

Convert JSON to Python dataclasses or Pydantic models.

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JSON to Query String

Convert JSON object to URL query string. URL encoding, array handling.

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JSON to Rust Struct

Convert JSON to Rust structs with serde derives. Serde, Default, Debug.

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JSON to Rust Struct

Convert JSON to Rust structs with serde derives. Serde, Default, Debug.

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JSON to Rust Struct

Convert JSON to Rust structs with serde derives.

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JSON to SQL

Convert JSON data to SQL INSERT statements or CREATE TABLE. Multiple dialects.

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JSON to TOML

Convert JSON to TOML configuration format. Tables, arrays, inline tables.

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JSON to TypeScript Interface

Convert JSON to TypeScript interfaces. Type inference, optional props, unions.

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JSON to TypeScript Interface

Convert JSON to TypeScript interfaces. Type inference, optional props, unions.

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JSON to TypeScript Interface

Convert JSON to TypeScript interfaces. Type inference, optional.

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JSON to XML

Convert JSON to XML. Attributes, namespaces, custom root element.

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JSON to XML Converter

Convert JSON to XML with custom root element, attribute handling (@attr keys), array item naming, CDATA wrapping, pretty-print, namespaces, and reverse XML→JSON. 100% client-side.

JSON to YAML

Convert JSON to YAML. Multi-document, anchors, comments, custom indent.

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JSON Validator

Validate JSON syntax with detailed error messages. Line/column reporting for errors.

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JSON Viewer (Tree)

Interactive JSON tree viewer. Expand/collapse nodes, search, copy paths, export.

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JSON-RPC Request Builder

Build JSON-RPC 2.0 requests. Method, params, id, batch requests.

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JSON-RPC Request Builder

Build JSON-RPC 2.0 requests. Method, params, id, batch.

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JSONPath Evaluator

Evaluate JSONPath expressions against JSON data. Highlight matches.

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JSX to JavaScript Compiler

Compile JSX to plain JavaScript. React.createElement, fragments.

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JSX to JavaScript Compiler

Compile JSX to plain JavaScript. React.createElement, fragments.

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JSX to JavaScript Compiler

Compile JSX to plain JavaScript. React.createElement.

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Julian Date & Astronomical Time Converter

Convert between Julian Date (JD), Modified Julian Date (MJD), Reduced/Truncated/Dublin JD, Rata Die, days since J2000.0, Unix epoch, and Gregorian calendar date/time. Supports BC dates, proleptic Gregorian AND Julian calendar systems, fraction-of-day, and the separate mainframe ordinal 'Julian date' (YYDDD/YYYYDDD). High precision, fully client-side.

JWT Claim Extractor

Extract and decode JWT claims (payload) without verification. 100% private. 100% private.

JWT Debugger

Decode, verify (HS256/384/512, RS256/384/512, PS, ES256/384/512, EdDSA), lint, encode, and compare JSON Web Tokens — all 100% in-browser via WebCrypto. Security lint flags alg:none, missing exp, weak secrets.

JWT Debugger

Decode, verify, and generate JSON Web Tokens (HS256/384/512) entirely in-browser via WebCrypto. Flags alg:none, algorithm-confusion, expired/not-yet-valid, missing exp, weak HMAC secrets. No whitespace-stripping bug, no network calls.

JWT Generator & Signer

Generate and sign JWT tokens. HS256/RS256/ES256, custom claims.

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JWT Generator & Signer

Generate and sign JWT tokens. HS256/RS256/ES256, custom claims.

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JWT Generator & Signer

Generate and sign JWT tokens. HS256/RS256/ES256, claims.

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JWT Verifier

Verify JWT signatures. HS256/RS256/ES256, expiry, claims validation.

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Keynote to PDF Converter

Convert Apple Keynote (.key) presentations to PDF in the browser — pure JavaScript ZIP parser + pdf-lib. Extracts metadata.json for slide count + title, parses preview.jpg, and renders placeholder slides to PDF (with title, slide numbers, and an honest disclaimer about not rendering actual slide content). 100% client-side.

Keyword Cannibalization Detector

Detect when multiple pages target the same keyword. Bulk input, dedup, severity scoring, export report, merge/canonicalize suggestions, stats, history, shareable URL. 100% client-side.

Keyword Density Analyzer

Analyze pasted text or HTML for word and n-gram (1/2/3-word) frequency and density, with configurable stop-word lists, stemming, position weighting (title/H1/H2/body/anchor), and over-optimization flags — not magic % targets. 100% client-side.

Keyword Density Analyzer (SEO 13)

Analyze keyword density in content. Single, 2-word, 3-word phrase frequency with stopword filtering.

Keyword Difficulty Estimator

Estimate keyword difficulty (0-100) from known factors — keyword length, word count, commercial intent, brand presence, SERP competition indicators. Bulk keywords, opportunity score, recommendations, CSV export, history, shareable URL. 100% client-side.

Keyword Extractor

Extract keywords from text using TF-IDF and frequency analysis. 100% private. 100% private.

Keyword Grouping Tool

Group keywords by topic and intent for content clustering. Common-word grouping, informational/transactional/navigational intent, cluster naming, min size, dedup, CSV/JSON export, stats, history. 100% client-side.

Keyword Match Type Builder

Build Google Ads keyword match types — broad, phrase, exact, and negative — from a keyword list. Batch convert, dedup, stats per type, CSV export, and Google Ads reference. 100% client-side.

Keyword Rank Tracker

Track keyword rankings over time — import keyword + position + date, compute rank changes, best/worst positions, average position, generate chart data, export CSV, history (localStorage), shareable URL. 100% client-side.

Keyword Research Explorer

Generate keyword suggestions from seed keywords. Synonyms, related terms, questions, comparisons, intent modifiers. Algorithmic volume & difficulty estimates, bulk seeds, dedup, sort, CSV export, history, shareable URL. 100% client-side.

Kubernetes Manifest Generator

Generate Kubernetes manifests. Deployments, services, ingress, configmaps.

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Language Translator Helper

Language learning aid with a built-in phrase book (200+ phrases across 10 languages × 8 categories), conjugation tables (10 verbs × 6 tenses), number translator (1-100), and 3 practice modes (browse, flashcard, reverse-translation). Translation lookup, reverse translation, pronunciation guide (romanized for non-Latin scripts), search filter, difficulty marker per phrase, text/CSV renderers, copy + download, history (localStorage), and shareable URL. 100% client-side — no network.

Large File Generator

Create exact-size dummy test files filled with zeros, random data, 0xFF, sequential bytes, or repeating text. Batch generation, size presets (1KB-1GB), filename templates with numbering, progress bar, hex preview. 100% client-side.

Length / Distance Unit Converter

Convert between 18+ length units: metric (m, km, cm, mm, µm, nm), imperial (in, ft, yd, mi, nautical mi), astronomical (AU, ly, parsec), typographic (pt, px), and more. With 10+ extras. 100% private.

Less to CSS Compiler

Compile Less to CSS. Variables, mixins, nested rules.

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Less to CSS Compiler

Compile Less to CSS. Variables, mixins, nested rules.

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Lesson Plan Generator

Generate structured lesson plans with objectives, activities, assessment. 100% private. 100% private.

Letter Frequency Counter

Count per-letter frequency, density, and distribution with visualization data. 100% private. 100% private.

Line Ending Converter

Convert line endings between CRLF (Windows), LF (Unix), CR (Classic Mac). Detect source, normalize, batch files, and 10+ extras. 100% private.

Linearize (Web-Optimize) PDF

Linearize PDF for faster web viewing. Progressive loading, byte-serving ready.

Linearize Web-optimize PDF

Linearize PDF for faster web viewing. Progressive loading.

Link Prospecting List Builder

Build link prospecting lists from search footprints. Generate guest post / resource / broken-link queries, prospect template, status tracker (pending / contacted / yes / no), stats, export CSV, dedup, history (localStorage), shareable URL, niche presets, priority scoring. 100% client-side.

LinkedIn Post Formatter

Format raw thoughts into LinkedIn-ready posts with bold hooks, bullets, CTAs, hashtags, and algorithm-friendly line breaks. 5 post-type presets (text-post, article-share, poll, celebration, hiring), 5 tone presets (thought-leader, educator, mentor, storyteller, analyst), headline extractor, bullet formatter, CTA generator per post type, hashtag generator (3-5 professional), char-count validator (1300 optimal, 3000 max), format validator (emoji limit, professional language), 3 post variations, hook strength scorer (0-100), best time-to-post suggestion, history (localStorage), shareable URL. 100% client-side.

LIT to EPUB Converter

Convert Microsoft Reader (.lit) ebooks to EPUB format in your browser. Parses the LIT header (signature ITOLITLS), extracts text sections, splits into chapters, generates a complete EPUB with NCX + NAV TOC, and packages as a .epub ZIP. 100% client-side. DRM-free LIT files only.

LIT to PDF Converter

Convert MS Reader LIT ebooks to PDF in the browser — pure JavaScript. Parses LIT (Microsoft Reader) header + section table, extracts text, splits into chapters by headings, and renders to PDF using pdf-lib. Supports custom title, font size, page size, margins. 100% client-side.

Loan / EMI Calculator

Calculate EMI, total interest, and full amortization schedule with optional prepayments and CSV export. 100% private.

Loan Amortization Schedule (Monthly, Bi-Weekly, Weekly)

Generate full loan amortization schedules — monthly payment, principal/interest split, running balance, payoff date, and interest savings from extra payments. Standard amortization formula with monthly, bi-weekly, and weekly frequencies. Year-by-year summary for long loans. Export as text schedule or CSV. 17 extra features: 3 payment frequencies, monthly payment formula, per-payment interest calculator, per-payment principal calculator, balance tracker, extra-payment applier, total interest calculator, total paid calculator, payoff date estimator, text schedule renderer, CSV export, copy + download .txt + CSV, history (localStorage, last 20), shareable URL, summary stats, interest savings calculator (with vs without extra payment), year-by-year summary. 100% client-side.

Local Business Schema Generator

Generate LocalBusiness JSON-LD schema for local SEO. Business type selector, day-by-day opening hours, geo coordinates, ratings & reviews, price range, area served, image, Google Rich Results link, history, shareable URL. 100% client-side.

Local Citation Finder

Find local citation opportunities — directories and listings to submit your NAP (Name/Address/Phone) to. Built-in database of 50+ citation sources (general, niche-specific, country-specific), priority classification, time-to-submit estimator, required-fields list, total time estimate, filter by priority/category, summary stats, CSV export, history (localStorage), shareable URL. 100% client-side.

Local Rank Tracker

Track local SEO rankings across keywords and locations. Build a keyword x location tracking matrix, compute visibility scores (weighted local pack 60% + organic 40%), categorize positions (top pack / below pack / page 1 / page 2 / off-page), averages per keyword and per location, best/worst combos, CSV template generator, copy + download .txt + download CSV, history (localStorage), shareable URL, filters, summary stats. 100% client-side.

Locale Keyword Researcher

Generate locale-specific keyword variants for country/language combinations. Translate base keywords across 10 languages, apply locale spelling variants, attach localized modifiers, and produce Google search URLs per locale. 100% client-side — 17 extras including 50+ word translation table, currency detection, untranslatable word detector, history, shareable URL.

Long-Tail Keyword Generator

Generate long-tail keyword variations from seed keywords. Question modifiers (7 Ws), comparison, location, intent modifiers, bulk seed input, dedup, stats, CSV export, history. 100% client-side.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text by paragraphs, sentences, words, or characters. Multiple variants, custom word lists, and 10+ extras. 100% private.

Lost & New Backlink Tracker

Track lost and new backlinks by comparing two data exports. Compute diff (new, lost, kept), percentage change, anchor text analysis for new/lost, export CSV, copy report, history (localStorage), shareable URL. 100% client-side.

LRF to EPUB Converter

Convert Sony BroadBook (.lrf) ebooks to EPUB format in your browser. Parses the LRF header (signature LRF), extracts text objects from the BroadBook structure, splits into chapters, generates a complete EPUB with NCX + NAV TOC, and packages as a .epub ZIP. 100% client-side.

LRF to PDF Converter

Convert Sony BroadBook LRF ebooks to PDF in the browser — pure JavaScript. Parses LRF header + object table, extracts text from TEXT-type objects, splits into chapters by headings, and renders to PDF using pdf-lib. Supports custom title, font size, page size, margins. 100% client-side.

Luhn / Credit Card Validator

Validate identification numbers with the Luhn (mod-10) checksum — credit cards, IMEI, gift cards. Brand detection from BIN, step-by-step doubling visualization, corrected check-digit suggestion, transposition/typo hint, masked display, and bulk list mode with CSV export. 100% client-side — numbers never leave the browser.

LZH Extractor

Extract files from LZH/LHA archives in the browser — pure JavaScript LZH parser. Support level 0 (stored, no compression) and basic level 1 headers. List files, view sizes + CRC, extract stored files, re-zip as ZIP. 100% client-side.

MAC Address Generator

Generate, format, validate MAC addresses with OUI lookup. 10+ extras. 100% private.

MAC Address Vendor (OUI) Lookup

Look up the vendor/manufacturer of any MAC address against the IEEE OUI database.

MAC Address Vendor (OUI) Lookup & Formatter

Look up the vendor (OUI) for any MAC address against a bundled IEEE registry (200+ vendors, MA-L/MA-M/MA-S/IAB longest-prefix matching), reformat between colon, hyphen, Cisco dot, and bare hex notations, decode U/L (locally-administered) and I/G (multicast) bits, reverse-search vendor → prefixes, generate random vendor-correct MACs, batch lookup, and CSV export. 100% client-side, offline, no network.

MAC Address Vendor Lookup

Look up the vendor/manufacturer of any MAC address against the IEEE OUI database. Supports all MAC formats. 100% offline.

Makefile Generator

Generate Makefiles for various project types. Targets, variables, patterns.

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man Page / TLDR Command Reference

Instant, offline-capable, example-first TLDR reference for 60+ common CLI commands (ls, grep, find, tar, ssh, curl, docker, kubectl, git, …) — searchable by command name or by task ('compress a folder' → tar/zip examples), with platform variants (common / linux / osx / windows / sunos), related-commands see-also links, deep-links to the full man7.org man page, favorites and recent history (localStorage), and a shareable deep-link to any command. 100% client-side — the tldr corpus is bundled, nothing is uploaded. No ads.

Markdown Linter & Formatter

Lint Markdown against 25+ markdownlint-compatible rules (MD001–MD058) and auto-format with one click. Violations are reported with rule IDs, line numbers, fixable markers, and human messages. Configurable options: line length, list marker (-, *, +), heading style (atx vs setext), code fence style (backtick vs tilde), emphasis style, trailing spaces, blank lines around blocks. Auto-fix, copy, download, history (localStorage, max 20), shareable URL. 100% client-side.

Markdown Live Editor & Previewer

A split-pane markdown editor with instant GitHub-flavored live preview. Renders headings, bold, italic, lists, links, images, code blocks (with syntax highlighting), tables, blockquotes, and hr. Word/char/line/reading-time counts, autosave, dark mode, copy/download .md and .html, shareable URL. 100% client-side — your document never leaves the browser.

Markdown Preview

Live markdown preview with syntax highlighting. GitHub-flavored markdown support.

Markdown Syntax Cheatsheet & Reference

A searchable Markdown syntax cheatsheet with 60+ entries across basic Markdown, GFM, CommonMark, and extended flavors (alerts, task lists, footnotes, strikethrough, math, mermaid, autolinks, emoji). Each card shows source + live rendered output + a flavor-support matrix (CommonMark / GFM / GitLab / pandoc / Obsidian) and a copy button. Scratch pad to test any snippet. 100% client-side — no network.

Markdown Table Generator

Build a markdown table visually — add/remove rows & columns, edit cells, set per-column alignment (L/C/R), toggle the header row, then export valid GFM. Import from CSV/TSV or paste an existing markdown table to round-trip edit it. Also export HTML, CSV, JSON, or Jira. Pipes and newlines in cells are escaped automatically. 100% client-side.

Markdown to HTML Converter

Convert markdown to HTML. GitHub-flavored, syntax highlighting, table support.

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Markdown to HTML Converter

Convert markdown to HTML. GitHub-flavored, syntax highlighting, tables.

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Markdown to PDF

Convert Markdown to a styled PDF document. Supports headings, bold, italic, lists, code blocks, and links. Choose page size and orientation. 100% private, runs in your browser.

Markdown to Slides (Presentation) Generator

Convert a Markdown document into an HTML slide deck — split on `---` or `## ` headings into slides, generate reveal.js-compatible HTML with theme picker, extract speaker notes from HTML comments, preview slides, and export a self-contained HTML file. Supports Marp-style directives, code highlighting hints, image embedding, and per-slide layouts. 100% client-side, zero install, zero upload.

Markdown TOC Generator

Generate a clickable Markdown table of contents from any document's headings. Per-platform slug algorithm (GitHub, GitLab, pandoc, Bitbucket, generic), duplicate-heading disambiguation (-1, -2…), code-fence-aware parsing, setext heading support, depth range control, skip-first-heading, ordered or bullet list style, and insert/update at a [TOC] or  marker. 100% client-side.

Math Drill Generator

Generate math practice problems (add/sub/mul/div) with difficulty levels. 100% private. 100% private.

Math Practice Generator

Generate math practice worksheets for addition, subtraction, multiplication, and division. 5 operation types × 4 difficulty levels (easy, medium, hard, expert), number range parser, allow-negatives toggle, mixed mode, seeded reproducibility, problem validator, Fisher-Yates shuffler, timed mode, answer key, and text/HTML/CSV/Markdown export. 100% client-side.

MD5 Hash Generator

Generate MD5 hashes. Text/file input, hex/base64 output, RFC 1321.

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Meeting Agenda Maker

Generate structured meeting agendas with timeboxed agenda items, presenters, action items, and time slots. Enter meeting title, date, start/end time, attendees, agenda items (CSV: topic,duration_minutes,presenter), and objectives. Compute total meeting duration, total agenda time, buffer time, detect overflow, generate time slots, and export as text, HTML (printable), Markdown, or CSV. 16 extra features: attendee parser, agenda item parser, duration calculator, total agenda time calculator, buffer time calculator, time slot generator, overflow detector, 5 meeting type presets, multi-format renderers, copy/download, history (localStorage), shareable URL, summary stats. 100% client-side.

Meeting Cost Calculator

Calculate meeting cost based on attendees, hourly rates, duration. 100% private. 100% private.

Meeting Minutes Template Builder

Build structured meeting minutes with attendees, agenda, and action items. 100% private. 100% private.

Meeting Notes Maker

Generate structured meeting notes — agenda recap, decisions, action items (grouped by owner + sorted by due date), parking lot, and next-meeting pointer. Parses attendees, agenda recap (topic,discussion), decisions, action items (task,owner,due_date), parking lot. Calculates meeting duration, detects overdue action items, renders as text, printable HTML, or Markdown. 18 extra features: 5 parsers, duration calculator, by-owner grouper, by-due-date sorter, overdue detector, 7 meeting-type presets, 3 renderers, summary stats, history (localStorage), shareable URL, copy/download .txt/.html/.md/.csv. 100% client-side.

Meeting Room Booker

Calculate meeting room utilization, availability slots, optimal booking. 100% private. 100% private.

Meme Generator

Create memes with top/bottom text, popular templates, custom font and outline. 100% private. 100% private.

Meme Generator

Create memes with top and bottom text. Classic meme templates, custom images, Impact font.

Merge Conflict Resolver

Resolve git merge conflicts visually. Side-by-side, pick lines, auto-resolve.

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Merge Multiple PDFs (Advanced)

Merge multiple PDFs with advanced options. Page ranges, order, bookmarks.

Merge Multiple PDFs (Advanced)

Merge multiple PDFs with advanced options. Ranges, bookmarks.

Merge PDF

Combine multiple PDF files into one. Reorder files, pick exact page ranges per file (e.g. 1-3, 5), and download the merged PDF. 100% private — files never leave your browser.

Merge PDF

Merge multiple PDF files into one. Reorder pages, drag-drop, range selection.

Merge PDFs with Bookmarks

Merge multiple PDFs and add bookmarks for each source file. Custom titles.

Merge PDFs with Bookmarks

Merge multiple PDFs and add bookmarks for each source file. Custom titles.

Mermaid Diagram Live Editor

Validate Mermaid syntax, detect diagram type (flowchart, sequence, class, ER, gantt, pie, state, mindmap, gitGraph, journey, C4, timeline, quadrant, requirement, xychart), generate a shareable mermaid.live preview URL with base64 encoding, browse a syntax reference per type, and export as PNG or SVG via the live editor. Template gallery, line-anchored error decoder, history (localStorage), shareable URL. 100% client-side.

Meta Description A/B Tester

Generate, score, and A/B/C compare meta descriptions side-by-side with pixel-accurate SERP preview, CTR-heuristic scoring, keyword bolding, and a bulk audit mode that flags missing / duplicate / over-length descriptions. 100% client-side.

Meta Description Generator

Generate and A/B test meta descriptions. Multiple suggestions, 160-char counter, pixel width estimator, keyword insertion, SERP preview, templates, history, shareable URL. 100% client-side.

Meta Robots & X-Robots-Tag Tester

Test and analyze meta robots directives. Parse HTML meta tag or X-Robots-Tag header, validate directives (index/noindex/follow/nofollow/noarchive/nosnippet), detect conflicts, generate recommendations, output a fixed tag. Reference table, history (localStorage), shareable URL. 100% client-side.

Meta Tag Generator

Generate HTML meta tags for SEO, Open Graph, Twitter Cards, and JSON-LD schema. Includes title-length checker, pixel-width estimator, and 10+ extras. 100% private.

Metronome

Online metronome with custom BPM, time signature, and accent patterns. 100% private. 100% private.

MIME Type Lookup

Look up MIME types by extension or vice versa. Magic bytes detection, IANA links, charset detection, sniffing risk warnings, .htaccess/nginx export, conflict finder, and quiz mode. 100% offline.

MOBI Reader

Read MOBI ebook files in the browser — pure JavaScript binary MOBI parser. Parse PalmDB header + MOBI header, extract text content, chapter navigation, metadata (title, author). 100% client-side.

MOBI to EPUB Converter

Convert MOBI ebooks to EPUB format in the browser — pure JavaScript. Parses MOBI (PalmDB + MOBI + EXTH headers + text records), extracts chapter text, splits into chapters by <h1>/<h2>/<mbp:pagebreak/>, generates an EPUB 3 (OPF + NCX + NAV + XHTML chapters). Supports custom title/author, CSS, encoding. 100% client-side.

Mobi To Pdf Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

Mobile-Friendly Tester

Test mobile-friendliness from HTML. Check viewport meta, font-size readability, tap target spacing, content width, responsive images. Score 0-100, pass/warn/fail per check, recommendations. Mobile preview dimensions, history (localStorage), shareable URL. 100% client-side.

Mock CSV Data Generator

Generate realistic mock CSV datasets — define columns with types (string, number, date, boolean, email, phone, name, address, uuid, url, custom), choose row count, delimiter (comma/semicolon/tab/pipe), header toggle, quoting policy, line endings (LF/CRLF), BOM toggle, infer columns from pasted header, seedable for reproducibility. Export as CSV/TSV/JSON. Unlimited rows, 100% client-side, no row caps, strict RFC 4180.

Mock GraphQL Response Generator

Generate realistic mock GraphQL responses from a pasted SDL schema and optional query. Type-aware mock generation with Faker-mapped scalars (String/Int/Float/Boolean/ID/Date/Email/URL/UUID/JSON), list sizing, enums, unions/interfaces with __typename resolution, fragments & aliases, per-field overrides, nullable/error-state injection, MSW/Apollo resolver snippet export. 100% client-side, no schema upload.

Mock REST API Generator

Generate mock REST API responses. Custom endpoints, status codes, delays.

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Mock REST API Generator

Generate mock REST API responses. Custom endpoints, status codes, delays.

Mock SQL Data Generator

Generate realistic fake test data from a SQL schema and emit INSERT statements, CSV, or JSON. Parse CREATE TABLE DDL or define fields manually; per-column data types include names, emails, dates, numbers, addresses, UUIDs, IPs, ENUMs and regex patterns. FK-aware relational generation (child rows reference valid parent keys), deterministic seed for reproducible data, blank %, unique constraints, batched INSERTs, and per-dialect output (MySQL, PostgreSQL, SQLite, SQL Server). Unlimited rows, 100% client-side, no server.

Modular Arithmetic & GCD/LCM Calculator (CRT, Bézout, Mod-Inverse)

BigInt-exact modular arithmetic: a mod m (floor or truncated), modular add/subtract/multiply/exponentiation (binary exponentiation), GCD/LCM of two or more numbers, extended Euclidean algorithm with Bézout coefficients, modular inverse with existence check, and a Chinese Remainder Theorem solver for a system of congruences — with step-by-step Euclid tables. 100% client-side & offline.

Molarity Calculator

Calculate molarity from moles and volume. 100% private. 100% private.

Molecular Weight Calculator

Calculate molecular weight from chemical formula. 100% private. 100% private.

MongoDB Aggregation Pipeline Builder

Build MongoDB aggregation pipelines stage-by-stage with $match, $project, $group, $sort, $limit, $skip, $unwind, $lookup, $addFields, $count, and $facet. Per-stage live preview on pasted sample documents. Accumulators ($sum, $avg, $push, $first, $last, $max, $min, $count) and expressions ($cond, $switch, $concat, $toUpper, $toLower, $add, $subtract, $multiply, $divide, $dateToString, $ifNull, $literal). Export pipeline JSON + driver code for mongosh, Node, Python, Java, C#, and PHP. Stage enable/disable toggle, drag-reorder, shareable URL, history. 100% client-side.

MongoDB Query Builder

Build MongoDB queries visually with AND/OR/NOR grouping, $eq/$ne/$gt/$gte/$lt/$lte/$in/$nin/$regex/$exists/$type/$size/$mod/$not operators, projection, sort, limit, skip, and operation modes (find / findOne / insertOne / updateMany / updateOne / replaceOne / deleteMany / deleteOne). Generates MQL JSON, mongosh, and driver code for Node, Python, Java, C#, and PHP. Runs an in-browser MQL filter engine against pasted sample documents. 100% client-side.

Monthly Budget Planner

Plan your monthly budget — track income, expenses by category (actual vs budgeted), savings goals, and variance analysis. Apply the 50/30/20 rule (needs / wants / savings). Export as text or CSV. 18 extra features: income parser, expense parser, total income, total expenses, net income, savings rate, per-category variance, total variance, savings goal progress, 50/30/20 rule check, 7 currency presets, 10 category presets, text report, CSV export, history (localStorage), shareable URL, summary stats, copy & download. 100% client-side.

Morse Code Encode/Decode

Convert text to Morse code and back. Audio playback, ITU standard.

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Morse Code Encoder

Encode text to Morse code with ITU standard, audio timing, and multiple output formats. 100% private. 100% private.

Morse Code Translator

Translate text to Morse code and back. ITU standard, audio playback, adjustable WPM speed, and 10+ extras. 100% private.

Mortgage Calculator

Full PITI mortgage calculator with PMI drop-off at 78% LTV, extra-payment payoff modeling, and CSV amortization export. 100% private.

Mortgage Insurance Calculator

Calculate PMI/MIP costs based on LTV, loan type, and term. 100% private. 100% private.

Multi-line to Single-line Converter

Convert multi-line text to single line. Custom separator, trim options.

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Multi-line to Single-line Converter

Convert multi-line text to single line. Custom separator, trim options.

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Multiplication Tables Generator

Generate printable multiplication tables in three modes — single number (7×1 to 7×10), range (1-12 × 1-10), and complete NxN grid. Highlight multiples, choose from 4 color schemes (rainbow, mono, blue-scale, green-scale), render as text/HTML/CSV/Markdown, copy and download every format, save history (localStorage, last 20), share via URL, with 4 size presets (10×10, 12×12, 15×15, 20×20), summary stats, print-optimized layout, and negative-number support. 100% client-side — no network.

MX Blacklist Checker

Check MX records against common blacklists with DNS reference. 100% private. 100% private.

My IP Address Lookup

Show your public IP address, location, ISP, and connection details. WebRTC leak detection included.

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My IP Address Lookup

Show your public IP address, location, ISP, and connection details. WebRTC leak detection.

N-up Booklet (Page Imposition)

Arrange PDF pages in N-up grids (2x2, 3x3, 4x4). Booklet imposition.

N-up Booklet (Page Imposition)

Arrange PDF pages in N-up grids (2x2, 3x3, 4x4). Booklet imposition.

N-Up PDF (Booklet)

Arrange multiple PDF pages per sheet — 2-up, 4-up, 6-up, 8-up, or 16-up. Perfect for booklet printing and saving paper. 100% private, runs in your browser.

NanoID Generator

Generate NanoIDs. Custom alphabet, length, bulk generation.

NAP Citation Consistency Checker

Check NAP (Name, Address, Phone) consistency across local SEO citations. Compare each citation against your master NAP, normalize formatting, compute consistency %, and flag field-level mismatches. 100% client-side.

NDJSON/JSON Lines Viewer

View and parse NDJSON (JSON Lines) files. One JSON object per line.

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NDJSON/JSON Lines Viewer

View and parse NDJSON (JSON Lines) files. One JSON object per line.

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Nginx Config Generator

Generate Nginx configuration files. Server blocks, reverse proxy, SSL.

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Noise Texture Generator

Generate noise textures (Perlin/Simplex/Value) with frequency, octaves, and blend modes. 100% private. 100% private.

Noise Texture Generator

Generate noise textures (Perlin, Simplex, Value, Worley) as seamless tiles for games/design.

NSLookup Reference

Reference for DNS lookup types (A, AAAA, MX, TXT, CNAME, NS, SOA) with query builder. 100% private. 100% private.

Number Base Converter (Binary / Octal / Decimal / Hex / Base 2–36)

Convert a number between any two bases from 2 to 36 — binary, octal, decimal, hex, base32, base36 — with BigInt precision, place-value expansion, fractional radix-point support, signed two's-complement mode, plus base58 and base64 byte-encoding shortcuts. Auto-detects 0x/0b/0o prefixes, groups long binary/hex output, and batch-converts a list of numbers. 100% client-side.

Numbers to PDF Converter

Convert Apple Numbers (.numbers) spreadsheets to PDF in the browser — pure JavaScript ZIP parser + pdf-lib. Extracts metadata, parses sheet info from .iwa files (limited), and renders placeholder tables to PDF. Honest about not rendering actual cell content. 100% client-side.

OCR PDF (Make Searchable)

Add searchable text layer to scanned PDFs using OCR. Multi-language support.

OCR PDF (Make Searchable)

Add searchable text layer to scanned PDFs. Tesseract OCR, multi-language.

Octal to Binary Converter

Convert octal numbers to binary. 100% private. 100% private.

Odds Calculator

Convert between probability, decimal odds, fractional odds, American odds. 100% private. 100% private.

ODP to PDF Converter

Convert OpenDocument Presentation (.odp) files to PDF in the browser — pure JavaScript ODP parser + pdf-lib renderer. Extracts slides from content.xml and renders each as a PDF page with title, bullet points, and configurable page size (4:3 or 16:9). 100% client-side.

ODS to PDF Converter

Convert OpenDocument Spreadsheet (.ods) files to PDF in the browser — pure JavaScript ODS parser + pdf-lib renderer. Extracts tables and cells from content.xml, renders them as a formatted PDF table, and downloads a polished .pdf. 100% client-side.

ODT to PDF Converter

Convert OpenDocument Text (.odt) files to PDF in the browser — pure JavaScript ODT parser + pdf-lib renderer. Extracts paragraphs, headings, and lists from content.xml, applies custom font size / page size / margins, and downloads a polished .pdf. 100% client-side.

Office to PDF (Word/Excel/PPT)

Convert Office documents to PDF. .docx, .xlsx, .pptx to PDF.

Office to PDF (Word/Excel/PPT)

Convert Office documents to PDF. .docx, .xlsx, .pptx.

Online Stopwatch & Timer

A drift-free stopwatch (with laps/splits), countdown timer (with alarm) and Tabata interval timer — timestamp-anchored for accuracy after backgrounding or sleep. Run multiple named timers at once, see lap analytics (fastest/slowest/avg), export laps as CSV, use Pomodoro & Tabata presets, fire a Web Audio beep alarm, drive everything from the keyboard. State persists across refresh. 100% client-side.

Open Graph Generator

Generate Open Graph and Twitter Card meta tags for social sharing. Live social-card preview, image URL validation, character counters, and links to Facebook/Twitter/LinkedIn debug tools. 100% client-side.

Open Graph Image Generator

Generate Open Graph images as SVG (1200×630). Title, subtitle, background color, text color, font size, logo URL, template selector (gradient / solid / pattern), text positioning, SVG download, preview, history, shareable URL. 100% client-side.

Open Graph Social Card Generator

Design and export social share cards (OG + Twitter). Canvas-based with templates, fonts, gradients, brand kit, and 10+ extras. 100% private.

Open Graph Tag Generator

Generate Open Graph meta tags. og:title, og:image, og:url, og:type.

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OpenAPI to Client SDK Generator

Generate client SDKs from OpenAPI specs. JavaScript, Python, Go, Rust.

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OpenAPI to Client SDK Generator

Generate client SDKs from OpenAPI specs. JS, Python, Go, Rust.

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OpenAPI/Swagger Viewer & Editor

View and edit OpenAPI/Swagger specs. Syntax highlighting, validation, preview.

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OpenAPI/Swagger Viewer & Editor

View and edit OpenAPI/Swagger specs. Syntax highlighting, validation.

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Organize PDF (Reorder & Delete)

Organize PDF pages: reorder, delete, rotate, insert blank. Visual interface.

Organize PDF (Reorder & Delete)

Organize PDF pages: reorder, delete, rotate, insert blank. Visual interface.

Orphan Page Detector

Find pages on your site that receive zero internal links. Paste your URL inventory and a list of internal links (plain URLs or <a href> tags) — we detect orphans, count internal links per URL, surface top-linked and bottom-linked pages, and extract anchor text. 100% client-side with CSV export, history (localStorage), and shareable URL. Bulk-parses HTML anchor tags with attribute-tolerant regex.

Outreach Email Template Generator

Generate personalized outreach emails for link building — guest post pitches, backlink requests, broken link alerts, collaboration, and influencer outreach. Variables, tone presets, subject lines, and stats. 100% client-side.

Overlay PDF on PDF (Stamp Document)

Overlay one PDF on top of another. Position, opacity, page range.

Overlay PDF on PDF (Stamp Document)

Overlay one PDF on top of another. Position, opacity, page range.

Overlay PDF on PDF (Stamp Document)

Overlay one PDF on top of another. Position, opacity, range.

Oxford Comma Fixer

Add or remove Oxford commas from lists. With style guide options. 100% private. 100% private.

package.json Generator

Generate package.json files. Dependencies, scripts, metadata, types.

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Page Experience Signal Checker

Check page experience signals — Core Web Vitals (LCP, FID, CLS, INP), HTTPS, mobile-friendliness, intrusive interstitials, and safe browsing. Per-signal scoring, color-coded status, weighted page-experience score, recommendation generator, comparison mode, CSV export, history, shareable URL. 100% client-side — paste measurements, get instant scores.

Pages to PDF Converter

Convert Apple Pages (.pages) documents to PDF in the browser — pure JavaScript ZIP parser + pdf-lib. Extracts text from document.xml or preview.pdf when available, parses metadata, and renders text to PDF. Honest about layout fidelity limitations. 100% client-side.

Pagination SEO Checker

Validate pagination SEO best practices — rel prev/next chain, canonical self-reference, status codes, sequence gaps, duplicate canonicals. Auto-detects 5 pagination URL patterns, categorizes issues by severity, generates recommendations, CSV export, history (localStorage), shareable URL. 100% client-side.

Palindrome Checker

Check if text is a palindrome with case/space/punctuation options. 100% private. 100% private.

Passport ID Photo Maker

Create passport/ID photos with correct dimensions for 30+ countries. Crop, background, print layout.

Passport Photo Maker

Create passport photos with country-specific sizes, head positioning guide, background check. 100% private. 100% private.

Password Generator

Generate cryptographically-secure passwords, EFF passphrases, pronounceable passwords, PINs, WiFi passwords, and Diceware — with per-class minimums, zxcvbn cross-check, pattern detection, history, and CSV/JSON export. 100% private.

Password Policy Checker

Check password against configurable policy rules (length, complexity, history). 100% private. 100% private.

Password Strength Checker

Estimate password strength with entropy calculation, character-class scoring, common-password detection, pattern analysis, and 10+ extras. 100% private.

Password Strength Meter

Honest, zxcvbn-style password strength estimation with 0–4 scoring, entropy in bits, multi-scenario crack-time (online throttled / bcrypt / MD5 GPU), pattern breakdown, and 10+ extras. 100% client-side — your password never leaves the browser.

Pathfinding Algorithm Visualizer

Step-by-step visualization of 6 grid pathfinding algorithms (BFS, DFS, Dijkstra, A*, Greedy Best-First, Bidirectional BFS) with selectable heuristics (Manhattan, Euclidean, Chebyshev, Octile), paintable walls and weighted cells, maze generators (recursive division, Prim, randomized DFS), diagonal-movement toggle, custom grid input (rows, cols, walls, weights), play / pause / step-forward / step-back controls, visited / path / distance counters, and shareable grid URLs. 100% client-side.

Pattern Generator (SVG/CSS)

Generate SVG/CSS background patterns: stripes, dots, grid, checkerboard, chevrons, waves.

Payroll Calculator

Calculate payroll — gross pay, deductions, and net pay — for hourly and salaried employees. Federal/state tax, Social Security, Medicare, 401k, health insurance, YTD estimator, pay stub generator (text + HTML), CSV export, history (localStorage), shareable URL, summary stats. 100% client-side.

Payslip Generator

Generate payslip with gross/net pay, tax, deductions, allowances. 100% private. 100% private.

PBKDF2 Generator

Generate PBKDF2 key derivations. SHA-256/384/512, iterations, salt.

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PDF Accessibility Checker

Check PDF accessibility compliance against WCAG 2.1 AA/AAA, PDF/UA-1, and Section 508. Runs 10+ checks (document title, language, structure tree, image alt text, form labels, reading order, color contrast, bookmarks, tab order, metadata), computes a compliance percentage, lists critical must-fix issues, and generates best-practice recommendations. Multi-format reports (text/HTML/CSV/JSON), history, shareable URL, and 100% client-side.

PDF Alt Text Generator

Add alternative text to images in PDFs for accessibility (WCAG 2.1 / PDF/UA). Enumerates every image on every page, lists those missing alt text, lets you batch-add alt text via a pipe-separated textarea, auto-generates placeholder alt text ('Image N on page M'), marks decorative images so screen readers skip them, and validates alt text quality. Multi-format reports (text/CSV/JSON), WCAG compliance scoring, history, shareable URL, and 100% client-side.

PDF Annotation Comment Summary Export

Summarize and export PDF annotations. Author, type, page, content.

PDF Annotation Comment Summary Export

Summarize and export PDF annotations. Author, type, page, content.

PDF Auto-Redact PII

Automatically redact PII in PDF. SSN, email, phone, credit card patterns.

PDF Auto-Redact PII

Automatically redact PII in PDF. SSN, email, phone, credit card patterns.

PDF Barcode Stamper

Stamp barcodes onto PDF pages — CODE128, EAN-13, UPC-A, Code39, and ITF. 6 position presets, customizable width/height, optional text label, per-type validators, checksum calculators for EAN/UPC, bars → rectangles converter, batch per-page entries, page-range expander ("all" keyword), hex color parser, data-format suggester, summary stats, text + CSV reports, history (localStorage), shareable URL. 100% client-side — your PDF never leaves your device.

PDF Batch Processor

Batch process PDFs. Apply same operations to multiple files at once.

PDF Batch Processor (Pipeline)

Batch process multiple PDFs with a pipeline of operations. Automation.

PDF Batch Processor (Pipeline)

Batch process multiple PDFs with a pipeline of operations. Automation.

PDF Black & White Scan Optimizer

Optimize scanned PDFs: binarize, deskew, remove blank pages, compress. 100% private. 100% private.

PDF Bleed Adder

Add bleed area to a PDF for print production — enlarge each page by a configurable bleed margin (3/5 mm or 0.125"), optionally extend the background, and add crop + bleed marks. 100% client-side — your PDF never leaves your browser.

PDF Booklet Maker

Arrange PDF pages for booklet printing — saddle-stitch, perfect-bound, or gate-fold. 2 pages per sheet with duplex ordering for fold-and-staple binding. 100% client-side, no uploads. Includes crop marks, signature calculator, spine width estimator, and 16+ extra features.

PDF Booklet Printing Layout

Rearrange PDF pages for booklet printing. Saddle stitch, perfect bound.

PDF Booklet Printing Layout

Rearrange PDF pages for booklet printing. Saddle stitch.

PDF Bookmark from Headings

Auto-generate a hierarchical PDF bookmark outline from heading styles. Detect headings by font size, bold text, regex patterns, or manual selection. Build an H1 → H2 → H3 tree, dedupe orphans, validate destinations, and render as text/CSV/JSON. 18 extra features. 100% client-side — your PDF never leaves your browser.

PDF Bookmarks Editor

Add, rename, or delete bookmarks (outline entries) in a PDF. Create a table of contents that appears in the PDF reader sidebar. 100% private, runs in your browser.

PDF Bookmarks Editor

View, edit, add, remove PDF bookmarks/outline. Hierarchical structure, drag-drop.

PDF Bookmarks/Outline Editor

Edit PDF bookmarks/outline. Add, remove, reorder, destinations.

PDF Color Separation

Separate PDF colors into CMYK (4), RGB (3), or grayscale (1) channels for print prep. Generate per-channel PDFs, combined PDF, or side-by-side preview. Includes registration marks, channel labels, ink-coverage stats, color-usage analyzer, ZIP packaging, history, and shareable URL. 100% client-side — no uploads.

PDF Combine Pages Side-by-Side

Combine PDF pages 2-up (side-by-side) with spacing and orientation options. 100% private. 100% private.

PDF Compare

Compare two PDFs side-by-side — page count, per-page text diffs (Levenshtein similarity), metadata differences, structure (page sizes & fonts), image counts. 18+ extra features: 4 comparison modes, unified-diff / HTML / CSV / JSON renderers, significant-change finder, history & shareable URL. 100% client-side — no uploads.

PDF Contact Sheet

Generate a contact sheet (thumbnail grid) of all pages in a PDF as a new PDF. Choose grid size (2×2, 3×3, 4×4) and page labels. 100% private, runs in your browser.

PDF Crop Marks

Add professional crop marks (trim marks), registration crosses, bleed marks, and color density bars to a PDF for print finishing. 100% client-side — runs entirely in your browser, no uploads.

PDF Crop Marks & Bleed

Add crop marks and bleed to PDF for professional printing.

PDF Crop to Content

Auto-trim PDF page margins by detecting content boundaries. 100% private. 100% private.

PDF Deskew Tool

Deskew and straighten scanned PDF pages with angle detection. 100% private. 100% private.

PDF Document Assembler (Multi-File)

Assemble PDF from multiple source files. Mix pages from different PDFs.

PDF Document Assembler (Multi-File)

Assemble PDF from multiple source files. Mix pages from different PDFs.

PDF Document Info Metadata Viewer

View PDF metadata: title, author, subject, keywords, dates.

PDF Document Info/Metadata Viewer

View PDF metadata: title, author, subject, keywords, creator, dates.

PDF Document Info/Metadata Viewer

View PDF metadata: title, author, subject, keywords, creator, dates.

PDF Find & Replace Text

Find and replace text in PDF. Regex support, case-sensitive, multiple terms.

PDF Find & Replace Text

Find and replace text in PDF. Regex support, case-sensitive, multiple terms.

PDF Flipbook Generator

Convert PDF to interactive flipbook. Page-turn animation, HTML5 output.

PDF Flipbook Generator

Convert PDF to interactive flipbook. Page-turn animation, HTML5 output.

PDF Font Embedder/Subsetter

Embed fonts in PDF and create subsets. Reduce file size, ensure portability.

PDF Font Embedder/Subsetter

Embed fonts in PDF and create subsets. Reduce file size, ensure portability.

PDF Font Embedder/Subsetter

Embed fonts in PDF and create subsets. Reduce file size.

PDF Font Extractor

Extract embedded fonts from PDF — list fonts, identify type (TrueType / Type1 / OpenType / CID), detect subsetted fonts, extract embedded font programs to a ZIP, analyze per-page usage and character counts. 4 extraction modes, multi-format metadata (JSON / CSV / text), history, shareable URL, and 100% client-side processing.

PDF Font Subsetter

Subset embedded fonts in a PDF to reduce file size — scan every page for characters actually used, build a per-font subset plan, rename font programs with the standard ABCDEF+ subset prefix, re-save with object streams for additional lossless compression, and report per-font savings. 3 subsetting modes, aggressive glyph-pruning estimator, character-coverage report, history, shareable URL, and 100% client-side processing.

PDF Form Field Extractor

List and extract every AcroForm field from a PDF — text fields, checkboxes, radio buttons, dropdowns, option lists, signatures, and buttons — with full property inspection (page, required, read-only, max length, choices, current values). Export as JSON, CSV, text, or printable HTML table; group by page, type, or flat; auto-detect duplicate names and required-but-empty fields; reuse the schema with the PDF Form Filler. 100% client-side — no uploads.

PDF Form Filler

Fill PDF AcroForm fields (text, checkbox, radio, dropdown, list) with user-provided data in your browser. Supports field mapping/renaming, multi-value fields (radio/checkbox), flatten-after-fill, NeedAppearances flag, required-field validation, summary stats, and form-schema export for reuse. Includes history and shareable URL. 100% private — no uploads.

PDF Form Flattener

Flatten PDF form fields and annotations into static content so they can't be edited. Locks form values, prevents further edits, and 10+ extras. 100% private.

PDF Full-Text Search & Highlight

Search text across all PDF pages. Highlight matches, navigate results.

PDF Full-Text Search & Highlight

Search text across all PDF pages. Highlight matches, navigate results.

PDF Grayscale Converter

Convert color PDF to grayscale using luminance, average, lightness, desaturate, or custom-weighted methods. Optional B&W threshold, black/white preservation, dithering, ink-usage estimation, before/after histograms, history, and shareable URL. 100% client-side — no uploads.

PDF Header & Footer Adder

Add custom headers and footers to PDF pages — page numbers, document title, dates, or any text. Variables ({page}, {total}, {title}, {date}, {author}, {filename}), 3 positions (left/center/right), first-page-different, page-range filtering, multi-format reports, history, shareable URL. 17 extra features. 100% client-side — your PDF never leaves your browser.

PDF Highlight & Markup Extractor

Extract all highlights and markups from PDF. Bulk export with metadata.

PDF Highlight & Markup Extractor

Extract all highlights and markups from PDF. Bulk export with metadata.

PDF Highlight Extractor

Extract highlighted text from PDF. Color, page, author information.

PDF Highlight Extractor

Extract highlighted text from PDF. Color, page, author information.

PDF Hyperlink Editor

Edit hyperlinks in PDF. Add, modify, remove links. Internal and external.

PDF Hyperlink Editor

Edit hyperlinks in PDF. Add, modify, remove links. Internal and external.

PDF Hyperlink Editor

Edit hyperlinks in PDF. Add, modify, remove. Internal/external.

PDF Imposition

Impose PDF pages for print — 2-up, 4-up, 8-up, 16-up, or custom grid. Sequential, snake-fold, or booklet page order. 5 paper size presets, cut marks, and 18+ extra features including cost + print-time estimators. 100% client-side, no uploads.

PDF Ink Coverage Analyzer

Analyze ink coverage per page — calculate CMYK channel usage, estimate ink volume and print cost, flag heavy-ink pages, generate ink-saving recommendations. 4 analysis modes, multi-format reports (text/CSV/HTML), history, shareable URL, and 100% client-side processing.

PDF Interleave Merge (Alternate Pages)

Interleave pages from multiple PDFs alternately. 2-way, 3-way merging.

PDF Interleave Merge (Alternate Pages)

Interleave pages from multiple PDFs alternately. 2-way, 3-way merging.

PDF Layers (OCG) Editor

Edit PDF Optional Content Groups (layers). Show/hide, rename, reorder.

PDF Layers (OCG) Editor

Edit PDF Optional Content Groups (layers). Show/hide, rename, reorder.

PDF Layers (OCG) Editor

Edit PDF Optional Content Groups (layers). Show/hide, rename.

PDF Layers (OCG) Manager

Manage PDF layers. Visibility states, default, print/screen options.

PDF Layers (OCG) Manager

Manage PDF layers. Visibility states, default, print/screen options.

PDF Measure & Calibrate

Calibrate PDF measurements. Set scale, measure distance, perimeter, area.

PDF Measure & Calibrate (Distance/Area)

Calibrate PDF measurements. Set scale, measure distance, perimeter, area.

PDF Measure & Calibrate (Distance/Area)

Calibrate PDF measurements. Set scale, measure distance, area.

PDF Measure Tool (Distance/Area)

Measure distances and areas on PDF pages. Scale calibration, units.

PDF Measure Tool (Distance/Area)

Measure distances and areas on PDF pages. Scale calibration, units.

PDF Metadata Cleaner

Remove all metadata from PDF for privacy. Author, dates, custom properties.

PDF Metadata Editor

View and edit PDF metadata: title, author, subject, keywords, creator, and producer. One-click privacy clean to strip all metadata before sharing. 100% private, runs in your browser.

PDF Metadata Editor

View and edit PDF metadata. Title, author, subject, keywords, creator, dates.

PDF Page Label Editor

Edit PDF page labels. Logical numbering (i, ii, 1, 2, A, B) for navigation.

PDF Page Label Editor

Edit PDF page labels. Logical numbering (i, ii, 1, 2, A, B) for navigation.

PDF Page Labels Editor

Edit PDF page labels. Logical numbering (i, ii, 1, 2, A, B) for navigation.

PDF Page Labels Editor

Edit PDF page labels. Logical numbering (i, ii, 1, 2, A, B).

PDF Page Numbers

Add page numbers to any PDF. Choose position (6 spots), format (Page X of N), starting number, pages to skip, and font size. 100% private, runs in your browser.

PDF Page Organizer

All-in-one PDF page operations: reorder, rotate, delete, extract, duplicate, split, merge, and bookmark. Visual preview, drag-drop, and 10+ extras. 100% private.

PDF Password Encryptor

Add password protection to PDF files. Compute /O, /U, /P encryption parameters per the PDF spec (RC4 + MD5), inject an /Encrypt dictionary into the trailer, and download the protected PDF. Supports 40-bit RC4, 128-bit RC4, 128-bit AES encryption levels. 100% client-side.

PDF Permissions Editor

Edit PDF permissions. Print, copy, modify, annotate restrictions.

PDF Portfolio Package Builder

Build PDF Portfolio packages. Embed multiple files in one PDF container.

PDF Portfolio Package Builder

Build PDF Portfolio packages. Embed multiple files in one PDF container.

PDF Portfolio Package Builder

Build PDF Portfolio packages. Embed multiple files in one PDF.

PDF QR Code Stamper

Stamp QR codes onto PDF pages for links, document IDs, or verification tokens. 7 position presets, customizable size/color, optional text labels, 4 error-correction levels, batch per-page entries, page-range expander ("all" keyword), hex color parser, QR version calculator, data-capacity checker, URL validator, summary stats, text + CSV reports, history (localStorage), shareable URL. 100% client-side — your PDF never leaves your device.

PDF Redaction Tool

Permanently black out sensitive text and rectangular areas in a PDF. 18+ extra features: text + area redaction, 3 colors, 3 modes, sensitive-data auto-detect (CC, SSN, email, phone), metadata stripper, page-range filter, redaction-strength verifier, history & shareable URL. 100% client-side — no uploads.

PDF Rename from Content

Auto-rename PDF files based on content. First heading, title metadata.

PDF Rename from Content

Auto-rename PDF files based on content. First heading, title metadata.

PDF Security Remover

Remove password protection and security restrictions from PDF files. Parse the existing /Encrypt dictionary, verify the user password against the stored /U hash, decode the current permission flags, then strip the /Encrypt dictionary from the trailer. Honest about stream decryption limitations. 100% client-side.

PDF Size Optimizer

Optimize PDF file size — 4 optimization levels, image downsampling, unused object removal, stream recompression, font subsetting, and metadata stripping. Per-component size analysis, savings report (text/CSV/JSON). 100% client-side, no uploads.

PDF Spell & Grammar Check

Check spelling and grammar in PDF text. Suggestions, ignore lists.

PDF Spell & Grammar Check

Check spelling and grammar in PDF text. Suggestions, ignore lists.

PDF Summarize (On-Device AI)

Summarize PDF content using on-device AI. Key points, abstract, TLDR.

PDF Summarize (On-Device AI)

Summarize PDF content using on-device AI. Key points, TLDR.

PDF Summarizer (AI)

AI-powered PDF summarization. Executive summary, key insights, action items.

PDF Summarizer (AI)

AI-powered PDF summarization. Executive summary, insights.

PDF Table Extractor

Detect and extract tables from PDF pages — auto-detect, by grid lines, by text alignment, or by user rules. 5 output formats (CSV / Excel XLSX / HTML table / JSON / Markdown table), header detection, merged-cell detection, cell-type detection (number / date / text / currency), confidence scorer (0-1), table boundary calculator, column/row width+height calculators, multi-table extractor, table quality scorer, page-range parser, history (localStorage, last 20), shareable URL. 100% client-side — your PDF never leaves your device.

PDF Table of Contents from Headings

Generate PDF table of contents from heading text. Auto-detect levels.

PDF Table of Contents Generator

Generate table of contents for PDF from headings or bookmarks. Auto-detect.

PDF Tables to CSV

Extract tables from PDF and convert to CSV. Table detection, cell mapping.

PDF Tables to CSV

Extract tables from PDF and convert to CSV. Table detection.

PDF Tag Tree Viewer

Inspect the structure tree of a tagged PDF (PDF/UA). Walks the StructTreeRoot recursively, extracts every structure element (Document, Part, Section, H1–H6, P, List, Table, Figure, Link, …) with its attributes (Role, Alt, Lang, BBox), and renders the result as a tree, flat list, by-page, or by-type view. Validates heading hierarchy, detects missing structure, verifies reading order, and exports as text/HTML/JSON/CSV. 100% client-side.

PDF Text Extractor

Extract embedded text from PDF pages with multi-format export (text, JSON, CSV, Markdown). Includes page-range selection, text statistics, keyword frequency, reading-time estimate, language detection, in-content search, empty-page filter, history, and shareable URL. 100% client-side — your PDF never leaves your browser.

PDF Text-to-Speech Read Aloud

Read PDF text aloud using Web Speech API. Voice, rate, pitch control.

PDF Text-to-Speech Read Aloud

Read PDF text aloud using Web Speech API. Voice, rate, pitch control.

PDF Thumbnail Contact Sheet Generator

Generate contact sheet of PDF page thumbnails. Grid layout, custom size.

PDF Thumbnail Contact Sheet Generator

Generate contact sheet of PDF page thumbnails. Grid layout, custom size.

PDF Thumbnail Generator

Generate thumbnail images for each PDF page — for previewing, indexing, or gallery views. 5 size presets, 3 output formats (PNG/JPEG/WebP), ZIP or single-image-sprite output. 100% client-side, no uploads.

PDF to AZW3 Converter

Convert PDF text to AZW3 (KF8) Kindle format in your browser. Generates a simplified PalmDB + KF8 header + HTML records structure. Pure JavaScript — no Calibre needed. Downloads a .azw3 file readable by modern Kindle devices and apps.

PDF to DjVu Converter

Convert PDF text to a simplified DjVu format in your browser. Pure JavaScript — extracts text from each PDF page, generates a simplified DjVu MRP-style binary with text chunks and page breaks. Downloads a .djvu file. Honest disclaimer: this is a text-only simplified format, not a full DjVu image-based file.

PDF to EPUB Converter

Convert PDF text to EPUB ebook format in your browser. Extracts text from PDF pages, splits into chapters by page or heading, generates a complete EPUB (mimetype, container.xml, content.opf, NCX/NAV TOC, chapter XHTML files), and packages as a .epub ZIP. 100% client-side.

PDF to EPUB Converter

Convert PDF to EPUB e-book format. Chapter detection, reflowable text.

PDF to Excel Converter

Convert PDF files to XLSX (Microsoft Excel) in the browser — pure JavaScript PDF text extractor + SpreadsheetML generator. Extracts text lines from each page, treats each line as a row, splits by delimiter, and packages as an .xlsx ZIP. 100% client-side.

PDF to Excel Converter

Extract tables from PDF and convert to Excel (.xlsx), CSV, HTML, or JSON in your browser. Detects tables by clustering text on a y/x grid, handles multiple tables per page, detects headers, infers cell types (number/date/text/currency), and builds a minimal valid .xlsx (OOXML ZIP) entirely client-side. Includes history, shareable URL, summary stats, and table quality scoring. 100% private — no uploads.

PDF to Excel Converter

Extract tables from PDF to Excel (.xlsx). Table detection, cell mapping.

PDF to GIF Converter

Convert PDF pages to animated GIF. Frame delay, loop count, size control.

PDF to HTML Converter

Convert PDF files to HTML in the browser — pure JavaScript PDF content-stream parser. Extracts text from each page, wraps it in semantic HTML with paragraphs and page separators, and downloads a .html file. 100% client-side.

PDF to HTML Converter

Convert PDF to HTML. Preserve layout, extract text and images, CSS styling.

PDF to Image Converter

Convert PDF pages to PNG, JPEG, or WebP images in your browser. Pure JavaScript — uses pdf-lib to inspect pages and Canvas API to render each page as an image. Page-range selection, DPI/resolution control, quality slider, batch download as ZIP.

PDF to Images (PNG/JPG)

Convert PDF pages to images. PNG/JPG, DPI control, page range, bulk export.

PDF to JSON Converter

Convert PDF structure to JSON. Page content, metadata, text blocks, images.

PDF to Markdown Converter

Convert PDF to Markdown. Preserve headings, lists, links, code blocks.

PDF to MOBI Converter

Convert PDF text to MOBI ebook format in your browser. Generates a simplified PalmDB + MOBI header + text records structure. Pure JavaScript — no Calibre needed. Downloads a .mobi file readable by Kindle devices and apps.

PDF to ODP Converter

Convert PDF text to ODP (OpenDocument Presentation) in your browser. Extracts text from each PDF page, creates one slide per page with title + bullet points, and generates a valid ODP ZIP. Opens in LibreOffice Impress, OpenOffice Impress, Google Slides.

PDF to ODS Converter

Convert PDF text to ODS (OpenDocument Spreadsheet) in your browser. Extracts text from each PDF page, splits each line into cells by delimiter, and generates a valid ODS ZIP (mimetype, META-INF/manifest.xml, content.xml, styles.xml, meta.xml). Opens in LibreOffice Calc, OpenOffice Calc, Google Sheets.

PDF to ODT Converter

Convert PDF text to ODT (OpenDocument Text) in your browser. Extracts text from each PDF page and generates a valid ODT ZIP (mimetype, META-INF/manifest.xml, content.xml, styles.xml, meta.xml). Opens in LibreOffice, OpenOffice, Google Docs, and MS Word with ODT support.

PDF to ODT Converter

Convert PDF to OpenDocument Text (.odt) format. Editable in LibreOffice.

PDF to PDF/A (Archive) Converter

Convert PDF to PDF/A for long-term archiving. PDF/A-1b, PDF/A-2b, PDF/A-3b.

PDF to PDF/A (Archive) Converter

Convert PDF to PDF/A for long-term archiving. PDF/A-1b, PDF/A-2b, PDF/A-3b.

PDF to PDF/X (Print-Ready) Converter

Convert PDF to PDF/X for professional printing. PDF/X-1a, PDF/X-4.

PDF to PDF/X (Print-Ready) Converter

Convert PDF to PDF/X for professional printing. PDF/X-1a, PDF/X-4.

PDF to PostScript Converter

Convert PDF text to PostScript (.ps) format in your browser. Pure JavaScript — extracts text from each PDF page, generates valid PostScript with proper header, page setup, text rendering commands, and showpage. Downloads a .ps file.

PDF to PowerPoint Converter

Convert PDF text to PPTX (PowerPoint) presentations in your browser. Extracts text from each PDF page and creates one slide per page with title + content layout. Pure-JS OOXML generator — no Microsoft Office needed. Downloads a .pptx file.

PDF to PowerPoint Converter

Convert PDF pages into presentation slides — one slide per page — and export as a minimal valid .pptx (OOXML ZIP), a navigable HTML slide deck, or Marp-compatible Markdown. Choose from 4 slide layouts, preserve PDF aspect ratio, extract speaker notes from page text, and auto-generate slide titles from headings. Includes a pure-JS ZIP builder, copy + download, history, and shareable URL. 100% client-side — no uploads.

PDF to PowerPoint Converter

Convert PDF to PowerPoint (.pptx). One slide per page, preserve layout.

PDF to RTF Converter

Convert PDF files to RTF (Rich Text Format) in the browser — pure JavaScript PDF text extractor + RTF generator. Extracts text from each page, generates an RTF document with paragraphs and page breaks, and downloads a .rtf file. 100% client-side.

PDF to RTF Converter

Convert PDF to Rich Text Format (.rtf). Preserve formatting, fonts, colors.

PDF to Single Long Image

Combine all PDF pages into one long vertical image (PNG/JPG). Scrolling format.

PDF to SVG Converter

Convert PDF vector graphics to SVG. Preserve paths, text, and embedded images.

PDF to Text Converter

Extract plain text from PDF files in the browser — pure JavaScript PDF content-stream parser. Reads each page's text operators (Tj, TJ, ', "), joins text with configurable separators, and downloads a .txt file. 100% client-side.

PDF to TIFF Converter

Convert PDF to multi-page TIFF. DPI control, compression (LZW, CCITT), bulk.

PDF to Word Converter

Convert PDF files to DOCX (Microsoft Word) in the browser — pure JavaScript PDF text extractor + OOXML generator. Extracts text from each page, generates a minimal Word document (word/document.xml), and packages it as a .docx ZIP. 100% client-side.

PDF to Word Converter

Convert PDF to DOCX, HTML, Markdown, or plain text in your browser. Extracts text and structure, detects headings via font-size analysis, preserves paragraphs and page breaks, and builds a minimal valid .docx (OOXML ZIP) entirely client-side. Includes history, shareable URL, summary stats, and document-structure analyzer. 100% private — no uploads.

PDF to Word Converter

Convert PDF to editable Word (.docx) format. Preserve text, layout, tables.

PDF to XML Converter

Convert PDF to structured XML. Text, images, metadata, layout information.

Pdf To Xps Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

PDF Translate (Layout-Preserving)

Translate PDF text while preserving layout. Multi-language, side-by-side.

PDF Translate (Layout-Preserving)

Translate PDF text while preserving layout. Multi-language.

PDF Translate (On-Device)

Translate PDF on-device for privacy. Offline translation models.

PDF Translation Overlay

Overlay translated text on PDF pages for multilingual documents. 4 position presets (above / below / beside / replace original), 3 standard PDF fonts (Helvetica / Times-Roman / Courier), hex color + optional background highlight, page-range parser, text-direction (LTR/RTL) detector, RTL handler, basic Unicode language detection, multi-line batch parser (page|x|y|text|size), text-width estimator, overlay collision detector, CSV + text reports, history (localStorage, last 20), shareable URL. 100% client-side — your PDF never leaves your device.

PDF Version Converter

Convert PDFs between versions — 1.4 / 1.5 / 1.6 / 1.7 / 2.0 / PDF/A-1b / PDF/A-2b / PDF/A-3b / PDF/X-1a. Detects current version, rewrites header, removes unsupported features, embeds fonts & color profiles for PDF/A, adds output intents for PDF/X. 100% client-side, no uploads.

PDF Watermark

Add a text watermark to any PDF. Control placement (diagonal, tiled, centered), opacity, color, font size, and which pages to watermark. 100% private, runs in your browser.

PDF Word Count & Readability Stats

Analyze PDF readability. Flesch-Kincaid, Gunning Fog, grade level.

PDF Word Count & Readability Stats

Analyze PDF readability. Flesch-Kincaid, Gunning Fog, grade level.

PDF Word Count & Statistics

Count words, characters, pages, paragraphs in PDF. Reading time estimate.

PDF Word Count & Statistics

Count words, characters, pages, paragraphs in PDF. Reading time estimate.

PDF ZIP Bundler

Bundle multiple PDFs into a single ZIP archive with a metadata manifest and optional README. 4 organize modes, 4 compression levels, duplicate-file detection, multi-format reports. 100% client-side, no uploads.

PDF/UA Accessibility Tagging & Alt Text

Tag PDF for accessibility (PDF/UA). Alt text, reading order, structure.

PDF/UA Accessibility Tagging & Alt Text

Tag PDF for accessibility (PDF/UA). Alt text, reading order.

PDF/X Export (Print-Ready)

Export PDF as PDF/X print-ready. Bleed, trim, color management.

PEM Key Parser

Parse PEM private/public keys, extract key info. 100% private. 100% private.

People Also Ask Extractor

Extract and organize 'People Also Ask' style questions for content ideas. Question word selector (7 Ws), templates, bulk keyword input, dedup, count per type, CSV/markdown export, history. 100% client-side.

Percent Encoding (URL Encode)

Percent-encode/decode URL components. RFC 3986, reserved/unreserved chars.

DeveloperComing Soon

Percentage Calculator

Calculate percentages 6 ways: X% of Y, X is what % of Y, % increase/decrease, % of total, tip %, tax %. With copy, history, and CSV export. 100% private.

Percentage Of Calculator

Calculate X% of Y, what % is X of Y, and % increase/decrease. 100% private. 100% private.

Periodic Table Lookup

Search elements by name/symbol/number. Show atomic mass, electron config, category. 100% private. 100% private.

Periodic Table Quiz

Test knowledge of elements with multiple quiz modes. 100% private. 100% private.

Periodic Table Reference

Interactive periodic table with all 118 elements. Search by name/symbol/atomic number, filter by category, click any element for full details (mass, electronegativity, electron configuration, melting/boiling points, density, discovery year, isotopes). Period/group calculator, neighbor finder, compound formula validator, CSV/JSON export, history (localStorage), shareable URL. 100% client-side.

Phone Number Generator & Validator

Generate valid-format test phone numbers for 30+ countries and validate, parse, and format any number across E.164, international, national, and RFC 3966 (tel:) forms. Detects country, type (mobile/fixed/toll-free), and structural validity — pure JS, 100% client-side, no network.

Photo Grid Maker

Arrange photos in a grid with spacing, borders, and background. 100% private. 100% private.

Photo Grid Maker

Create photo grids/collages from multiple images. Multiple layouts, gap, padding, background.

Photo Mosaic Generator

Build a photo mosaic — recreate a main image out of hundreds of small tile photos, with adjustable tile size, perceptual color matching, grout spacing, and high-resolution print export. 100% client-side; your photos never leave your browser.

Photo Vintage Retro Filter

Apply vintage retro filters (70s/faded/B&W film) with grain, vignette, and fade. 100% private. 100% private.

Photo Vintage/Retro Filter

Apply vintage and retro film filters to photos. 20+ presets (Polaroid, Kodak, sepia, faded).

Physics Formula Reference & Calculator

Browse 50+ physics formulas across mechanics, electricity, waves, thermodynamics, modern physics, and optics. Solve any formula for any variable, validate required inputs, convert units, run dimensional analysis, and get sig-fig-aware results. Built-in constants (g, c, h, k, G, R, N_A). 100% client-side — 18 extra features including CSV/text export, history, shareable URL, search filter, difficulty markers.

Pig Latin Decoder

Decode Pig Latin back to English with rule-based and heuristic modes. 100% private. 100% private.

Ping & Latency Tester (Browser)

Generate ready-to-paste ping commands for Windows, Linux and macOS (count, interval, timeout, payload size, flood/no-resolve flags). Build a browser HTTP fetch-timing plan that uses the Performance API to measure round-trip latency — because browsers can't send ICMP. Pure latency statistics calculator: min / max / avg / stddev / jitter / packet-loss, plus a histogram and CSV export. 100% client-side — actual fetch timing needs the network; command generation and stats never do.

Ping Online (HTTP-based)

HTTP-based ping tool to check if a URL is reachable. Measures response time and status codes.

NetworkComing Soon

Pinterest Pin Description Generator

Generate SEO-optimized Pinterest pin descriptions with keyword-rich copy. 10 Pinterest category presets (diy, food, fashion, home-decor, beauty, travel, fitness, education, business, tech), keyword density calculator (1-3% optimal per keyword), category-specific openers, 4 CTA types (click, save, follow, comment), optional hashtag generator, keyword position optimizer (main keyword in first 100 chars), long-tail keyword suggester, 3 description length presets (short/medium/long), SEO score estimator, board name suggester, pin title generator (100 chars max), 3 variations per request, summary stats, CSV export, history (localStorage), shareable URL. 100% client-side.

Pixel Art Maker

A browser pixel-art editor for drawing and animating sprites with layers, frames, palettes, onion-skin, and export to PNG, GIF, APNG, and sprite sheets — entirely offline.

Plagiarism Similarity Checker

Compare two texts for similarity with n-gram analysis and highlight. 100% private. 100% private.

PlantUML Diagram Editor

Validate PlantUML syntax, detect diagram type (sequence, class, use case, activity, component, state, object, deployment), generate a shareable plantuml.com render URL (deflate+base64 encoded), browse a syntax reference per type, and export as PNG, SVG, or ASCII art via the official server. Template gallery, line-anchored error decoder, history (localStorage), shareable URL. 100% client-side.

PNG to ICO (Favicon) Converter

Convert PNG images to ICO format for Windows favicons. Multi-resolution ICO support.

Polaroid Photo Card Maker

Create polaroid-style photo cards with caption, border, and vintage effect. 100% private. 100% private.

Pomodoro Timer

Productivity timer using the Pomodoro Technique — 25/5 cycles with long breaks every 4 sessions. Customizable work/break durations, 4 presets (Classic 25/5, Long 50/10, Short 15/3, Custom), phase sequence generator, total time estimator, 3 beep frequency presets (Web Audio API oscillator — no external audio file), text + CSV export, history (localStorage), shareable URL, summary stats, circular progress indicator, auto-start toggle. 100% client-side.

Port Range Reference

Reference for common ports (1-65535) with service names. 100% private. 100% private.

Port Scanner

Reference tool for common network ports. Generate port scan commands and port assignments.

Port Scanner Reference

Reference tool for common network ports. Generate port scan commands and understand port assignments.

NetworkComing Soon

PostScript to PDF Converter

Convert PostScript (.ps) files to PDF format. Parses PS commands (showpage, moveto, show, lineto, etc.), extracts text per page, and renders to PDF using pdf-lib. Page detection, text extraction, custom margins, font/page size — 100% client-side.

PRC to EPUB Converter

Convert Mobipocket PRC ebooks to EPUB format in your browser. Parses the PalmDB header, extracts text records, decodes PalmDOC compression, splits into chapters, generates a complete EPUB with NCX + NAV TOC, and packages as a .epub ZIP. 100% client-side. DRM-free PRC files only.

Presentation Slide Outliner

Generate presentation slide outlines for 6 audience levels (elementary → expert). Title slide, agenda, content slides, summary, Q&A. Auto-calculates slide count from duration, per-slide time allocation, speaker notes, visual suggestions. Export TXT, HTML, Markdown (Marp/reveal.js), CSV. 100% client-side.

Prettier Config Generator

Generate Prettier configuration files. Print width, tabs, semicolons.

Prime Number Checker & Factorization Tool (Miller–Rabin, Pollard's Rho)

Check whether a number is prime with deterministic Miller–Rabin (64-bit) and probabilistic Miller–Rabin for larger integers, factorize any composite into its prime factors using trial division + Pollard's rho, generate primes with the Sieve of Eratosthenes, find prime gaps and twin primes, and compute divisor count/sum plus Euler's totient — all BigInt-exact and 100% client-side.

Print Size Calculator

Calculate print dimensions from pixels and DPI. Supports all standard print sizes. 100% private. 100% private.

Printable Calendar Generator

Generate clean, print-perfect printable calendars (monthly, yearly, weekly, multi-month grid) for any year as HTML with print CSS. Sunday / Monday / Saturday week start, locale month & day names, ISO week numbers, day-of-year, offline holiday presets (US / UK / EU), custom events, theme colors, paper sizes (Letter / Legal / A3 / A4 / A5 / Tabloid / custom), portrait / landscape. 100% client-side, no watermark.

Privacy Policy Generator (GDPR/CCPA)

Generate GDPR/CCPA-compliant privacy policies. Customizable for websites, apps, and SaaS.

Privacy Policy Generator (GDPR/CCPA)

Generate GDPR/CCPA-compliant privacy policies. Customizable for websites, apps, SaaS.

Probability Calculator

Calculate probability of events: single, compound, conditional, Bayes. 100% private. 100% private.

Product Review Schema Generator

Generate Product + Review + AggregateRating JSON-LD schema for product review pages. Includes BreadcrumbList + FAQPage companion schemas, Google rich results compliance checker, 7 currency presets, 4 availability presets, history (localStorage), shareable URL. 100% client-side.

Profile Picture Cropper

Crop profile pictures for social platforms with circle/square presets. 100% private. 100% private.

Profile Picture Cropper (Circle)

Crop images into circular profile pictures. Multiple sizes, border, background color.

Project Budget Calculator

Calculate project budget with labor, materials, overhead, contingency. 100% private. 100% private.

Project Task Tracker (Kanban)

Track project tasks with priorities, statuses, due dates and assignees — Kanban-style organization. Parse CSV task lists, filter by priority/status/assignee/overdue, sort by due-date/priority/status/title, compute summary stats (total, by-status, by-priority, overdue, completion %), priority weighting, next-action recommender, copy/download text + CSV, history (localStorage), shareable URL. 18 extra features. 100% client-side.

Protect PDF (Add Password)

Add password protection to PDF. User password, owner password, permissions.

Protect/Unlock PDF

Add or remove PDF password protection. Encrypt/decrypt, permissions.

Protect/Unlock PDF

Add or remove PDF password protection. Encrypt/decrypt.

Protobuf Decoder / gRPC Inspector

Decode protobuf messages and inspect gRPC payloads. Field types.

DeveloperComing Soon

Proxy VPN Detection Tool

Detect if an IP is a known proxy, VPN, or Tor exit node. Offline database of known proxy ranges.

NetworkComing Soon

Public IP & Geolocation Lookup

Generate curl/fetch commands to find your public IPv4/IPv6 and geolocate any IP or domain via ipinfo.io, ip-api.com, ipgeolocation.io, ipapi.co, KeyCDN, and HackerTarget. Parse pasted geolocation JSON into a unified card (country, region, city, lat/long with accuracy radius, ISP/org, ASN, timezone, reverse DNS, proxy/VPN hints). Honest accuracy caveats. Bulk IP lookup, CSV export, curl/wget/httpie/fetch snippets, history (localStorage), shareable URL. 100% client-side — generates commands and parses output only; actual lookups require the network.

Punycode Encode/Decode

Convert between Unicode domains and Punycode (IDN). xn-- prefix.

DeveloperComing Soon

Purchase Order Generator

Create purchase orders with vendor info, line items, totals, and approval workflow. 100% private. 100% private.

QR Code Generator (Image)

Generate QR codes as images. URL, text, WiFi, vCard, SMS, email. Custom colors, logo overlay.

QR Code Scanner (from Image)

Scan QR codes from uploaded images. Multiple QR detection, all QR types supported.

Query String Parser & Builder

Parse and build URL query strings. URL encoding, array params.

DeveloperComing Soon

Quiz Generator & Grader

Build multiple-choice quizzes from question|correct|wrong1|wrong2|wrong3 input. Take the quiz, get scored instantly, review every answer, and export as printable text or HTML. Includes question shuffler, per-question option shuffler, pass/fail with custom passing score, answer tracker, per-question feedback, quiz state machine, time tracker, summary stats, true/false auto-conversion to MC, per-question difficulty markers, 4 quiz presets (general knowledge, math, geography, science), history (localStorage), and shareable URL. 100% client-side — no network.

Quiz Maker

Create multiple choice quizzes with scoring, timer, export. 100% private. 100% private.

Quote / Proposal Generator (PDF/HTML/Text)

Generate professional PDF quotes and proposals with line items, discount, validity period and terms & conditions. No tax (quotes typically exclude tax until invoiced). Export as PDF (pdf-lib), printable HTML, plain text, or CSV. Includes a quote-to-invoice JSON converter so you can convert an accepted quote into an invoice payload. 18 extra features: line parser, totals, discount, grand total, 7 currency presets, validity presets (7/14/30/60/90 days), validity-days calculator, quote number auto-suggester, quote-to-invoice converter, history (localStorage), shareable URL, summary stats. 100% client-side.

Quoted-Printable Encode/Decode

Encode/decode quoted-printable format. RFC 2045, email bodies.

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Quoted-Printable Encode/Decode

Encode/decode quoted-printable format. RFC 2045, email bodies.

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Rainbow Text Generator

Generate rainbow-colored text with custom color schemes for HTML/markdown. 100% private. 100% private.

Random Bytes Generator

Generate cryptographically secure random bytes. Hex/base64 output.

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Random Date / Time Generator

Generate random dates and times within any range, in any format (ISO 8601, Unix epoch seconds/millis, locale, custom strftime-like pattern, relative 'time ago'), across time zones, with business-day filter, granularity (date/datetime/time), sorted/unique output, seeded reproducibility (mulberry32), and bulk export to CSV/JSON. 100% client-side.

Random IP & MAC Address Generator

Generate random IPv4 (with private/public/reserved scope + CIDR/range filters), IPv6 (full + compressed), and MAC addresses (with bundled IEEE OUI vendor prefixes, 4 formats, unicast/multicast + LAA/UAA bits) in bulk for network testing. Includes subnet helper and reverse lookup (MAC vendor + IP scope/class). 100% client-side — fixtures only.

Random Number Generator (Seeded)

Generate reproducible random numbers with four PRNG algorithms (mulberry32, LCG, xorshift, Mersenne-Twister), four distributions (uniform, normal, exponential, Poisson), unique-set mode, weighted choice, histogram preview, bulk export to CSV/JSON, plus a clearly-labeled crypto-secure CSPRNG mode. Seeded for reproducibility. 100% client-side.

Random String Generator

Generate random strings. Custom charset, length, pattern, CSPRNG.

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Random User Profile Generator

Generate coherent fake user profiles with 50+ correlated fields (name, email, phone, address, avatar, company, job, login, etc.). Multi-profile batch, JSON/CSV/XML export, seedable reproducibility, algorithmic (non-real) avatars. 100% client-side.

Rank Change Visualizer

Visualize ranking changes over time from pasted rank history. Compute per-keyword changes, build a timeline, identify biggest gains/drops, average position trend, stats table, export markdown, copy report, history (localStorage), shareable URL. 100% client-side.

RAR Extractor

Inspect RAR archives (RAR4 and RAR5). Detects the RAR signature, parses archive headers, lists file entries with sizes and compression methods, and displays archive metadata. Honest about RAR extraction limitations — full decompression requires WASM. 100% client-side.

Rate Limit & Retry-After Calculator

Calculate rate limits, retry-after delays, backoff strategies. Token bucket.

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Ratio Calculator

Simplify ratios, solve proportions, scale ratios. 100% private. 100% private.

Reading Level Analyzer

Analyze text reading level: Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI. 100% private. 100% private.

Reading List Tracker

Track your reading list with status, progress, ratings, and notes. Parse pipe-separated books, filter by status, sort by title/author/progress/rating/date-added, calculate reading stats (total books, by status, average rating, pages read), set reading goals, estimate reading time, get basic recommendations, and export as text or CSV. 100% client-side.

Reading Time Estimator

Estimate reading time with WPM control, speaking time, and slide count. 100% private. 100% private.

README Generator

Scaffold a professional README.md from clickable section blocks — title, badges, description, auto-TOC, installation, usage, features, API, contributing, license — with project templates (npm, GitHub, library, CLI, profile), an inline Shields.io badge builder, a license picker with full SPDX text (MIT, Apache-2.0, GPL-3.0, …), import of existing READMEs, and a live preview. 100% client-side.

Receipt Maker (PDF/HTML/Text)

Generate professional PDF payment receipts with itemized breakdown. Enter receipt number, date, payment method (cash/check/card/bank/PayPal/Stripe), payer + payee details, line items (`description,amount`), payment amount, currency and optional reference number. Verifies payment vs total, validates references per method, exports as PDF (pdf-lib), printable HTML, plain text, or CSV. 16 extra features: item parser, total calculator, payment verification, 8 payment method presets, 7 currency presets, PDF generator, HTML printable receipt, text receipt, receipt number auto-suggest, reference validator, CSV exporter, history (localStorage), shareable URL, summary stats. 100% client-side.

Recurring Date RRULE Generator

Build and parse iCalendar RRULE recurrence strings per RFC 5545 §3.8.5.3. Two-way editor: build via UI or paste an RRULE, instantly see the plain-English meaning and the next N concrete occurrences. Full support for FREQ (SECONDLY / MINUTELY / HOURLY / DAILY / WEEKLY / MONTHLY / YEARLY), INTERVAL, COUNT, UNTIL, BYDAY with ordinals, BYMONTHDAY, BYYEARDAY, BYWEEKNO, BYMONTH, BYSETPOS, WKST, EXDATE / RDATE. DST-aware UNTIL handling. Export VEVENT .ics and code snippets for rrule.js + python-dateutil. 100% client-side.

Red-Black Tree Visualizer

Step-by-step visualization of CLRS-style Red-Black tree insert and delete with full fix-up — every recolor and rotation labeled by case (insert cases 1-5, delete cases 1-6). Live five-property checklist with pass/fail (root black, no red-red, NIL black, equal black-height, valid colors), per-node red/black coloring, black-height display, in-order traversal, bulk insert, and shareable tree-state URLs. 100% client-side.

Redact PDF (Permanent)

Permanently redact PDF content. Remove text and metadata, not just cover.

Redact PDF (Permanent)

Permanently redact PDF content. Remove text and metadata, not just cover.

Redirect (301/302) Generator

Generate 301/302 redirect rules for .htaccess, Nginx, and Express. Bulk URL mapping with regex support.

Redirect & htaccess Generator

Generate Apache .htaccess redirect rules — 301, 302, 307, 308. RewriteRule vs Redirect directive, bulk mode, regex patterns, www→non-www, HTTP→HTTPS, trailing slash, query string handling, history. 100% client-side.

Redirect Chain Checker

Analyze URL redirect chains. Includes a redirect type reference (301, 302, 303, 307, 308, meta refresh, JS), chain visualization, hop count, final destination, and warnings for long chains and temporary redirects. 100% client-side — manual entry / live-check disclosure.

Redis Command Reference & Builder

Searchable Redis command reference with an interactive builder. Browse 50+ commands across STRING, LIST, SET, HASH, SORTED SET, KEY, PUB/SUB, STREAM, SERVER, CLUSTER and more. Per-command syntax, args, Big-O complexity, version, safety warnings, and one-click client code in redis-cli / node-redis / redis-py / Jedis. 100% client-side.

Referring Domains Explorer

Explore referring domains from imported backlink data. Extract unique referring domains, link count per domain, top domains ranking, domain authority estimate, TLD distribution, anchor text per domain. CSV export, history (localStorage), shareable URL. 100% client-side.

Regex Cheatsheet

Comprehensive regex cheatsheet. Character classes, anchors, quantifiers.

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Regex Explainer

Explain regular expressions in plain English. Step-by-step breakdown.

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Regex Generator

Generate regex from examples. Match patterns, extract data, common regex library.

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Regex Match Highlighter

Highlight regex matches in text. Capture groups, multiple matches.

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Regex Replace

Replace text using regular expressions. Capture groups, functions.

Regex Tester

Test regular expressions with live highlighting. Flags, capture groups, replace, cheat sheet.

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Regex Tester & Debugger

Test and debug regex with step-by-step execution. Match info, flags.

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Regex to Code (JS/Python/PHP)

Convert regex patterns to code in JavaScript, Python, PHP.

Relative Time (Time Ago) Formatter

Format any timestamp as a relative phrase ('2 hours ago', 'in 3 days', 'just now') across 5 locales (en, es, fr, de, ja) with auto unit selection, configurable thresholds, numeric 'always' vs 'auto' modes, multi-locale preview grid, and copy-paste code snippets for Intl.RelativeTimeFormat, Luxon, Day.js, and date-fns. 100% client-side.

Remove Blank Pages from PDF

Detect and remove blank pages from PDF. Threshold, auto-detect.

Remove Blank PDF Pages

Detect and remove blank pages from a PDF automatically. Keeps pages with any text, images, or drawings. 100% private, runs in your browser.

Remove Duplicate Lines

Remove duplicate lines from text. Case-insensitive, preserve order, count.

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Remove JavaScript from PDF (Sanitize)

Sanitize PDF by removing JavaScript, embedded files, and active content.

Remove JavaScript from PDF (Sanitize)

Sanitize PDF by removing JavaScript, embedded files, active content.

Remove Line Breaks

Remove line breaks from text. Join with space or custom separator.

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Remove Watermark from PDF

Attempt to remove watermarks from PDF. Text-based watermark removal.

Reorder PDF Pages

Change the page order in a PDF by typing a custom sequence (e.g. 3,1,2) or using quick presets: reverse all pages, or duplicate pages for printing. 100% private.

Reorder PDF Pages

Reorder PDF pages by drag-and-drop. Visual page thumbnails, insert blank pages.

Repair PDF

Attempt to repair corrupted or damaged PDF files. Rebuild xref, fix streams.

Repair PDF

Repair corrupted PDF files. Rebuild xref table, fix streams, recover content.

Repair PDF

Repair corrupted PDF files. Rebuild xref, fix streams, recover.

Resize Individual PDF Pages

Resize individual PDF pages to different dimensions. Per-page control.

Resize Individual PDF Pages

Resize individual PDF pages to different dimensions. Per-page.

Resize PDF Pages

Change PDF page size to A4, Letter, Legal, A3, or custom dimensions. Apply to all or selected pages. 100% private, runs in your browser.

Responsive Search Ad Builder

Build Google Responsive Search Ads (RSA) with up to 15 headlines (30 chars each) and 4 descriptions (90 chars each). Pin to positions, character counters, ad strength, desktop/mobile preview, and CSV export. 100% client-side.

REST API Client / HTTP Request Builder

Build and send HTTP requests. GET/POST/PUT/DELETE, headers, body, auth.

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Reverse DNS (PTR) Lookup Generator

Generate reverse DNS (PTR) lookup commands for any IPv4 or IPv6 address or CIDR. Builds the exact in-addr.arpa / ip6.arpa reverse-zone query name, plus ready-to-paste dig / nslookup / kdig (DoH) / host commands against Google, Cloudflare, Quad9, OpenDNS, or a custom resolver. Parses PTR zone records, builds a forward-confirmed reverse DNS (FCrDNS) chain, flags private/loopback/link-local IPs, and generates batch scripts. 100% client-side — generates commands only; actual lookups require running them in your terminal.

Reverse IP Lookup

Find domains hosted on the same IP address. Reference tool with manual input and bulk processing.

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Reverse Lines / Text

Reverse lines, words, or characters in text. Multiple modes.

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Reverse Lines / Text

Reverse lines, words, or characters in text. Multiple modes.

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Reverse PDF Page Order

Reverse the order of pages in a PDF. Last page becomes first.

Reverse PDF Page Order

Reverse the order of pages in a PDF. Last page becomes first.

Reverse PDF Pages

Reverse the page order of a PDF — last page becomes first, first becomes last. Instant, 100% private, runs in your browser.

Review Sentiment Analyzer

Analyze customer reviews for sentiment and extract topics — pure JS sentiment analysis with no AI or network calls. Built-in lexicon of 100+ positive/negative words, negation handling ('not good'), per-review score, sentiment label, star rating distribution, average star rating, mismatch detector (5 stars but negative text), top-5 topics, top-20 word frequency, filter, CSV export, history (localStorage), shareable URL. 100% client-side.

Robots.txt Generator

Generate robots.txt files for crawler control. User-agent presets (Googlebot, Bingbot, etc.), allow/disallow rules, wildcard patterns, crawl-delay, sitemap directive, comments, and validation warnings. 100% client-side.

robots.txt Parser & Validator

Parse and validate robots.txt files. Check allow/disallow rules, sitemap references, and crawl directives.

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ROI Calculator (ROI, Payback, NPV, IRR)

Calculate Return on Investment, payback period, annualized ROI (geometric mean), Net Present Value (NPV) and Internal Rate of Return (IRR) via bisection. Enter initial investment, annual cash flows, discount rate, terminal value. Profitability check (NPV > 0 and IRR > discount rate). Export as text or CSV. 18 extra features: cash flow parser, total cash flow, net profit, ROI, annualized ROI, payback period (year+month), NPV, IRR (bisection), discount rate applier, terminal value applier, text report, CSV export, history (localStorage), shareable URL, summary stats, 5 ROI target presets, profitability indicator, copy & download. 100% client-side.

Roman Numeral Converter

Convert between Arabic numbers and Roman numerals both ways. Standard mode (1–3999) and vinculum mode (1–3,999,999 with overline ×1000). Strict vs lenient grammar validation (reject IIII / IC or allow clock-style). Additive/subtractive breakdown (e.g. MCMXCIV = 1000 + 900 + 90 + 4). Batch-convert lists, year helper, copy result, history of Roman numerals reference. 100% client-side, no network.

ROT13/ROT47 Cipher

Encode/decode ROT13 and ROT47 ciphers. ASCII rotation, self-inverse.

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Rotate Page Range in PDF

Rotate a specific page range in PDF. 90/180/270 degrees.

Rotate Page Range in PDF

Rotate a specific page range in PDF. 90/180/270 degrees.

Rotate PDF

Rotate all pages, odd pages, even pages, or any specific page in a PDF by 90°, 180°, or 270°. 100% private — runs entirely in your browser.

Rotate PDF Pages

Rotate PDF pages 90°, 180°, 270°. Single page, page range, or all pages.

Rotate PDF Pages (Permanent)

Permanently rotate PDF pages. 90, 180, 270 degrees, page ranges.

Round Corners Tool

Round the corners of images with customizable radius. PNG transparency preservation.

RPM Extractor

Extract files from RPM packages (Red Hat Package Manager) in your browser. Parses the RPM lead header (magic ed ab ee db), reads signature + regular headers for package metadata (name, version, release), and extracts the embedded cpio archive (gzip-compressed or uncompressed). 100% client-side. Browse, search, filter, preview, and download individual files or all as ZIP.

RSA Encrypt/Decrypt

Encrypt/decrypt with RSA keys. OAEP padding, SHA-256, key import.

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RSA Encryption Tool

RSA encrypt/decrypt with WebCrypto API, key generation, and OAEP padding. 100% private. 100% private.

RSA Key Pair Generator

Generate RSA key pairs using WebCrypto. 2048/4096-bit, PEM/JWK export.

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RSA Key Pair Generator

Generate RSA key pairs using WebCrypto. 2048/4096-bit, PEM/JWK.

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rsync Command Builder

Build correct rsync commands from a visual UI — local, push, and pull direction, trailing-slash visualizer (src/ copies contents vs src copies the dir), archive -a, verbose -v, compress -z, human -h, progress --progress, --delete (guarded with dry-run nudge), --delete-excluded, --exclude / --exclude-from, --partial, --bwlimit, --checksum, --numeric-ids, SSH transport (-e 'ssh -i key -p port'), preserve-detail breakdown of -a as -rlptgoD. Per-flag plain-English explanation, recipe library, history (max 20), shareable URL. 100% client-side — commands are generated, never executed.

RTF to PDF

Convert Rich Text Format (RTF) to PDF. Extracts plain text from RTF, stripping formatting codes, then renders as a clean PDF. 100% private, runs in your browser.

Rubric Maker

Create grading rubrics with criteria, levels, and point values. 100% private. 100% private.

Salary Income Tax Calculator

Calculate income tax from gross salary with brackets and deductions. 100% private. 100% private.

Sales Commission Tracker

Track sales commissions per rep with four calculation models: flat-percent, tiered-percent (progressive brackets), base-plus-percent, and bonus-per-deal. Parse deals from CSV, compute per-rep totals, generate payout schedules (monthly/quarterly/annually), find top performers, detect commission caps, leaderboard, history (localStorage), shareable URL. 100% client-side.

Sales Pipeline Tracker

Track sales pipeline deals across 6 stages — lead, qualified, proposal, negotiation, closed-won, closed-lost. Compute weighted pipeline value, per-stage breakdown, win rate, average deal size, top deals, and stale-deal alerts. Filter by stage and expected close-date range. 100% client-side, with history (localStorage) and shareable URL. Includes 10+ extra features: deal parser with validation, stage presets with default probabilities, weighted value per deal, pipeline value, weighted pipeline, per-stage breakdown, win rate, average deal size, stage + date filters, text report, CSV export, top deals finder, stale deal detector.

Sample JSON / Mock API Response Generator

Generate realistic mock API responses from a JSON Schema or example. REST single/array, paginated envelopes, JSON:API, GraphQL, error templates, and webhook payloads. Status codes, headers, MSW snippet. 100% client-side.

Sample Rate Reference

Reference for audio sample rates and their use cases. 100% private. 100% private.

Scale Calculator

Calculate scale factor for maps, models, blueprints. 100% private. 100% private.

Scale PDF Content

Scale PDF page content (text, images, vectors) by a percentage (25%–400%). Page size scales with content. 100% private, runs in your browser.

Scale PDF to Fit (Page Scaling)

Scale PDF pages to fit different paper sizes. A4, Letter, custom.

Scale PDF to Fit (Page Scaling)

Scale PDF pages to fit different paper sizes. A4, Letter.

Schema.org JSON-LD Generator

Generate Schema.org structured data in JSON-LD format for rich results — Article, Product, Event, Organization, LocalBusiness, Person, Recipe, Review, FAQPage, HowTo, BreadcrumbList, VideoObject. Includes validation, multi-schema support, custom properties, and Google Rich Results test link. 100% client-side.

Scientific & Engineering Notation Converter (SI Prefix, E-Notation)

Convert numbers between decimal, scientific (a × 10^b), engineering (exponent multiple of 3), SI-prefixed (12.3k, 4.7µ), and E-notation (1.5e-9) — with adjustable significant figures, exact BigInt mantissa math, full SI prefix table from yocto to quetta (plus binary IEC prefixes), batch list conversion, and rounding-mode selection. 100% client-side & offline.

Scientific Calculator

Scientific calculator with trig, log, exponential, memory, history, and 10+ extras. 100% private.

Scientific Notation Converter

Convert between decimal and scientific notation with E-notation and engineering notation. 100% private. 100% private.

Screenshot Beautifier (Mockup BG)

Beautify screenshots with gradients, mockups, shadows, and annotations. Social media ready.

scrypt Hash Generator

Generate scrypt password hashes. N, r, p parameters, salt, hash length.

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scrypt Hash Generator

Generate scrypt password hashes. N, r, p parameters, salt.

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SCSS to CSS Compiler

Compile SCSS to CSS. Nesting, variables, mixins, functions.

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SCSS to CSS Compiler

Compile SCSS to CSS. Nesting, variables, mixins, functions.

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Search & Redact in PDF

Search for terms in PDF and redact all occurrences. Bulk, regex.

Search & Redact in PDF

Search for terms in PDF and redact all occurrences. Regex.

Search Console Data Analyzer

Analyze Google Search Console CSV exports (URL, Query, Clicks, Impressions, CTR, Position). Aggregate by URL and query, identify top pages/queries, find high-impression low-CTR opportunities, striking-distance keywords (positions 5-15), low-position high-impression pages, high-position low-impression pages, generate optimization recommendations, summary stats, filters, copy + download .txt + download CSV, history (localStorage), shareable URL. 100% client-side.

Search Intent Classifier

Classify search intent — informational, transactional, navigational, or commercial. Confidence score, content recommendations, SERP feature suggestions, bulk keywords, intent distribution stats, CSV export, history, shareable URL. 100% client-side.

Secret Key Generator (Base64)

Generate random secret keys. Base64/hex, custom length, CSPRNG.

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Secret Key Generator (Base64)

Generate random secret keys. Base64/hex, custom length, CSPRNG.

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Secure Random Generator

Generate cryptographically secure random numbers, bytes, hex strings, and 10+ extras. 100% private.

sed Command Builder & Tester

Build and test sed commands against sample text in the browser. A pure-JavaScript sed interpreter (no WASM, no network) supports substitute (s///), delete (d), print (p), insert (i), append (a), change (c), and next (n) commands with line addressing (single line, range, $, /regex/), BRE and ERE (-E) regex flavours, flags (g, i, p, N), -n suppress-auto-print, -i in-place preview, auto delimiter selection (/, |, #, ~, ^) when search/replace contains a slash, GNU-vs-BSD -i guidance, backreference helper (\1..\9 and &), and per-command plain-English explanation. Visual builder, reverse explainer, recipe library, sample-text presets, history (max 20), shareable URL. Preview only — never edits real files. 100% client-side.

SemVer Calculator & Range Tester

Calculate and test semantic version ranges. ^, ~, >=, *, prerelease.

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SemVer Calculator & Range Tester

Calculate and test semantic version ranges. ^, ~, >=, prerelease.

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Sentence Splitter

Split text into sentences with abbreviations awareness. 100% private. 100% private.

SEO Content Scorecard

Audit content for SEO best practices. 10+ check categories, 0-100 score, pass/warn/fail per check, prioritized recommendations, markdown export, custom thresholds, history, shareable URL. 100% client-side.

SEO Content Scorecard Audit

Unified, transparent on-page SEO audit of pasted content or HTML — combining title/meta, headings, keyword coverage, content depth, links, images/alt, schema, and readability into a prioritized, evidence-backed scorecard. 100% client-side.

SEO Experiment Tracker

Track SEO A/B experiments — title tag tests, meta description tests, content changes. Parse before/after CSV per page, compute deltas, % change, winners/losers/neutral, aggregate totals, basic statistical significance check, recommendation (roll out / roll back / extend), experiment status (planned/running/completed/paused), confidence score, filters, copy + download .txt + download CSV, history (localStorage), shareable URL. 100% client-side.

SEO KPI Dashboard Builder

Build KPI dashboards from raw SEO data. Paste CSV (kpi,value,target,date) and visualize metrics with ASCII bar charts, ASCII line charts, status classification (on-track/behind/critical), HTML dashboard with inline CSS, markdown dashboard, CSV export, history, shareable URL, KPI templates. 100% client-side.

SEO Report Generator

Generate white-label SEO audit reports in markdown, HTML, or text. Eight section templates (executive summary, technical SEO, on-page, content, backlinks, keyword rankings, competitors, recommendations), weighted overall score, cover page, table of contents, history (localStorage), shareable URL. 100% client-side.

SEO Slug Generator

Generate SEO-friendly URL slugs from any title. Customizable separator, case, max length, stop-word removal, transliteration, and 10+ extras. 100% private.

SERP Competitor Analysis Tool

Analyze competitor content for a target keyword. Paste HTML from top results (up to 3) — extract word count, heading structure, keyword usage, meta tags, content gaps. Markdown report export, history, shareable URL. 100% client-side.

SERP Feature Detector

Detect and track SERP features (featured snippets, PAA, local pack, image pack, video carousel).

SERP Position Checker

Estimate SERP position for a keyword + URL from difficulty factors — position estimate, difficulty factors breakdown, recommendations, bulk keywords, position categories, export CSV, history (localStorage), shareable URL. 100% client-side, no API.

SERP Snippet Preview

Preview how your page will appear in Google search results. Desktop and mobile previews, title (60 chars) and description (160 chars) truncation, pixel-width estimation, date prefix, breadcrumb URL display, and rich result indicator. 100% client-side.

Server Log File Analyzer (SEO)

Parse Apache/Nginx server logs (common + combined format) for SEO insights: Googlebot activity, status-code distribution, crawl frequency, 404 broken URLs, multi-bot detection (Bing/Yandex/Baidu/DuckDuckGo/Ahrefs/Semrush/Apple), response-time stats, CSV export, history, shareable URL. 100% client-side — paste logs, get instant crawl insights.

Server-Sent Events (SSE) Tester

Test SSE endpoints. Connect, listen, inspect events. Reconnection logic.

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SHA-1 Hash Generator

Generate SHA-1 hashes using WebCrypto. Text/file, hex/base64.

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SHA-1 Hash Generator

Generate SHA-1 hashes using WebCrypto. Text/file, hex/base64.

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SHA-256 Hash Generator

Generate SHA-256 hashes using WebCrypto. Text/file, hex/base64.

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SHA-256 Hash Generator

Generate SHA-256 hashes using WebCrypto. Text/file, hex/base64.

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SHA-3 Hash Generator

Generate SHA-3 (Keccak) hashes. SHA3-256, SHA3-512, pure JS.

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SHA-3 Hash Generator

Generate SHA-3 (Keccak) hashes. SHA3-256, SHA3-512, pure JS.

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SHA-512 Hash Generator

Generate SHA-512 hashes using WebCrypto. Text/file, hex/base64.

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SHA-512 Hash Generator

Generate SHA-512 hashes using WebCrypto. Text/file, hex/base64.

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Share of Voice Calculator

Calculate SEO Share of Voice from keyword rankings + search volumes. Visibility score (0-100), position weighting (top 3 > top 10), competitor comparison, weighted by volume, bulk input, export CSV, history (localStorage), shareable URL. 100% client-side.

Shell Command Explainer

Paste any shell command line and get every token (command, flags, flag-values, positionals, operators) explained from a bundled offline manpage/tldr dataset. Splits combined short flags (ls -la → -l + -a), knows which flags take a value, decomposes pipelines (|, &&, ||, ;), redirections (> >> < 2>&1 &>), and flags destructive commands (rm -rf, dd of=/dev/sdX, mkfs, chmod 777, fork bombs). 100% client-side; nothing uploaded.

Shell Script Linter (ShellCheck)

Lint shell scripts. Bash, sh, zsh. Common mistakes, suggestions.

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Shift Schedule Planner

Plan work shifts, calculate coverage, detect gaps. 100% private. 100% private.

Simple Interest Calculator

Calculate simple interest (SI = P*R*T/100) with 3 solver modes, partial years, and 10+ extras including comparison with compound interest. 100% private.

SIP Calculator

Calculate the future value of a Systematic Investment Plan (SIP) with optional annual step-up. Shows total invested, returns, and projected corpus. 100% private.

Slow Motion Maker

Create slow motion videos with speed control and frame interpolation reference. 100% private. 100% private.

Slug Generator

Generate URL-friendly slugs from text. Lowercase, hyphens, strip special chars.

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Social Content Calendar

Plan monthly social media content calendar. 100% private. 100% private.

Social Content Ideas Generator

Generate content ideas from keywords, trending formats, and platform best practices. 100% private. 100% private.

Social Engagement Predictor

Predict engagement based on post type, timing, hashtags. 100% private. 100% private.

Social Engagement Tracker

Track engagement metrics across posts with rate calculations. 100% private. 100% private.

Social Hashtag Generator

Generate relevant hashtags from keywords for platforms. 100% private. 100% private.

Social Media A/B Tester

Calculate statistical significance for social media A/B tests. 100% private. 100% private.

Social Media Analytics Dashboard

Build analytics dashboards from social media CSV data — visualize followers, posts, engagement, impressions, reach with ASCII bar charts, line charts, KPI cards, HTML/Markdown dashboards, platform comparison, growth-trend analysis. 100% client-side. 20 extra features: CSV parser, date grouping (daily/weekly/monthly), per-platform aggregator, metric stats, ASCII bar chart, ASCII line chart, KPI cards, HTML email-friendly dashboard, Markdown dashboard, growth rate, best/worst period finder, text dashboard, CSV export, multi-format downloads, history (localStorage), shareable URL, summary stats, engagement-rate calculator, follower trend analyzer, platform comparison table.

Social Media Bio Generator

Generate platform-specific bios/profiles for Twitter/X, Instagram, LinkedIn, TikTok, and YouTube. 5 tone presets (professional, casual, creative, minimalist, humorous), per-platform char limits (Twitter 160, IG 150, LinkedIn 220 headline, TikTok 80, YouTube 1000), tone-aware emoji appender, platform CTAs, website link inserter, hashtag/keyword inserter, pronoun inserter, bullet formatter, name formatter (full/first/initials), 3 variations per platform, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Social Media Bio Optimizer

Optimize social media bios for character limits, keywords, and engagement. 100% private. 100% private.

Social Media Caption Generator

Generate engaging captions for Instagram, TikTok, Facebook, and Pinterest. 8 mood presets, 3 caption lengths (short/medium/long), 70+ caption templates (mood × length), hook + body + CTA generators, mood-aware emoji appender, keyword-based hashtag generator (5-15 per caption), platform-specific CTAs, caption length validator, 3 variations per request, IG first-comment hashtag separator, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Social Media Character Counter

Live Unicode-aware character counter for Twitter, Instagram, Facebook, LinkedIn, TikTok, and Mastodon. Counts characters (emojis count as 2 per Twitter spec), words, hashtags, mentions, URLs (counted as 23 chars on Twitter), emoji with skin-tone variations, and line breaks. Per-platform char limits per mode (post, bio, comment, DM). Remaining chars with over-limit warnings and optimal-length indicators. Plus CSV export, reading-time estimator, auto-truncator, live preview, history (localStorage), and shareable URL. 100% client-side.

Social Media Collab Finder

Find collaboration opportunities: influencer outreach query generator, brand partnership matcher, cross-promotion partner finder, affiliate program structure, sponsored content briefs, giveaway collab planner, follow-up sequence, compensation calculator. 6 collab types, 5 platforms, 4 audience tiers, 20 features. 100% client-side.

Social Media Comment Responder

Generate professional responses to social media comments categorized by sentiment and intent. Sentiment analyzer (4 sentiments), 72-template response library (sentiment × tone combinations), 6 platform presets with platform-specific formatting, 6 tone presets, 3 length presets, emoji appender, CTA generator, 3 response variations, char count validator, quality scorer, escalation detector, keyword highlighter, response time suggestion, best practice tips. 100% client-side.

Social Media Content Repurposer

Repurpose one piece of content across 7 target formats — blog post, YouTube transcript, podcast transcript, email newsletter, or presentation slides into Twitter threads, LinkedIn posts, Instagram captions, Facebook posts, TikTok scripts, email summaries, and Medium articles. Content analyzer extracts title, hook, key points, quotes, stats, and CTAs. 5 source-type presets, 5 tone presets, 2 variations per format, quality scorer, cross-format consistency checker, best-format recommender, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Social Media Contest Planner

Plan social media contests and giveaways with official rules, entry mechanics, prize formatting, eligibility checks, winner-selection suggestions, hashtag generator, per-platform disclaimers, promotion schedule, and compliance checker. 5 platforms, 6 contest types, 7 entry methods, 20 features. 100% client-side.

Social Media Contest Runner

Randomly pick contest winners from comments/entries. 100% private. 100% private.

Social Media Emoji Translator

Translate text to emojis and back with a 1000+ word-to-emoji dictionary, 50+ phrase mappings, and 10+ emoji-art templates. Four modes (text-to-emoji, emoji-to-text, emoji-art, mixed), four density levels (sparse/medium/dense/ultra-dense), original text preservation, alternative-emoji suggester, tone detector, ZWJ combination generator, coverage report, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Social Media Engagement Tracker

Track social media engagement metrics — likes, comments, shares, saves, impressions. CSV parser with validation, engagement-rate calculator, per-post ranker (5 metrics), per-platform aggregator, date-range filter, trend analyzer (first half vs second half), best/worst post finder, summary stats, platform benchmarks, posting frequency, best-time-to-post suggestion, audience growth predictor. 100% client-side, history (localStorage), shareable URL.

Social Media Giveaway Picker

Pick giveaway winners randomly with dedup and multi-prize. 100% private. 100% private.

Social Media Hashtag Analyzer

Analyze hashtag performance across Instagram, Twitter, LinkedIn, TikTok, and YouTube. Parse CSV of hashtag data, aggregate per-hashtag stats (avg engagement, avg reach, total posts), rank by 4 metrics, find top performers, analyze trends, density, co-occurrence, recommend hashtags, find best combos, flag saturated hashtags. 19 features. 100% client-side.

Social Media Image Resizer

Resize images for Instagram, Twitter/X, Facebook, LinkedIn, YouTube, and TikTok. 18 platform/format presets (square, portrait, story, landscape, header, cover, thumbnail, avatar), 3 output formats (jpeg/png/webp), 4 quality presets, 2 crop modes (fill/cover or fit/contain), batch processing, image metadata extraction, file-size estimator, orientation + aspect-ratio detection, quality scorer, ZIP download, CSV/text reports, history (localStorage), shareable URL. 100% client-side.

Social Media Mention Tracker

Track brand mentions across platforms — Twitter, Reddit, LinkedIn, YouTube, Hacker News, Product Hunt. CSV parser with validation, brand-name matcher with aliases, per-platform mention counter, basic sentiment analyzer (keyword + user-provided), mention trend analyzer, top author finder, mention reach estimator (platform + author heuristics), date-range filter, mention content searcher, summary stats, sentiment trend, mention velocity, top mentions, alert threshold. 100% client-side, history (localStorage), shareable URL.

Social Media Poll Generator

Generate optimized polls for Twitter, LinkedIn, Instagram, and Facebook. Pick a poll type (this-or-that, multiple-choice, rating-scale, opinion-scale, yes-no-maybe), tone, and duration. Per-platform constraints, question generator, option generator, engagement optimizer, hashtag + caption generator, variations, best-time-to-post, follow-up content suggestions. 20 features. 100% client-side.

Social Media Post Generator

Generate platform-specific social media posts for Twitter/X, LinkedIn, Facebook, Instagram, and Mastodon. Tone presets, target audiences, per-platform char limits, CTA + hashtag + emoji generators, 3 variations per platform, best-time-to-post, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Social Media Post Scheduler

Plan social media posts across platforms with optimal posting times. 100% private. 100% private.

Social Media Trend Detector

Detect trending topics across Twitter, Instagram, TikTok, LinkedIn, and YouTube. Parse CSV of mention data, compute growth rates ((recent - prior) / prior × 100), classify trends (trending/stable/declining), rank by growth or absolute mentions, find emerging / sustained / declining trends, compute trend velocity, predict lifecycle stage, score opportunities, and find cross-platform trends. 20 features. 100% client-side.

Social Poll Creator

Create polls with options, vote tracking simulation, and platform formatting. 100% private. 100% private.

Social Thread Generator

Split long text into numbered threads for Twitter/X. 100% private. 100% private.

Solid Color Image Generator

Generate solid color images at any size with hex/RGB input. 100% private. 100% private.

Solid Color Image Generator

Generate solid color images at any dimension. Hex/RGB input, multiple formats.

SOP Generator

Generate Standard Operating Procedure (SOP) documents — purpose, scope, roles & responsibilities, process steps, tools, troubleshooting, and references. Auto-calc next review date (1 year after last reviewed), sum total process duration, validate required fields, suggest SOP IDs by department, render as text / printable HTML / Markdown, and generate a one-page quick reference card. 18 extra features: roles parser, process step parser, tools list parser, troubleshooting parser, references parser, next-review-date calculator, total duration calculator, 8 department presets, SOP ID auto-suggester, multi-format renderers, quick reference card generator, copy + download .txt/.html/.md, history (localStorage), shareable URL, summary stats, required-field validator. 100% client-side.

Sort Lines

Sort lines alphabetically, numerically, by length, natural sort. Custom order.

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Sort Lines

Sort lines alphabetically, numerically, by length, natural sort.

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Sorting Algorithm Visualizer

Step-by-step visualization of 11 sorting algorithms (bubble, cocktail, selection, insertion, shell, gnome, merge, quick, heap, counting, radix) with live comparison / swap / array-access counters, custom array input, presets (random, reversed, nearly-sorted, few-unique), play / pause / step-forward / step-back controls, side-by-side race mode, per-algorithm complexity + stability cards, and shareable URLs. 100% client-side.

Source Map Visualizer

Visualize JavaScript source maps. Original vs generated, tree view.

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Speed Converter

Convert between mph, km/h, m/s, fps, knot with all-units table. 100% private. 100% private.

Spelling Bee Practice

Practice spelling with text-to-speech pronunciation. Hear the word, type it, get instant feedback. 5 difficulty levels (elementary → spelling-bee) with 500+ built-in words, 3 practice modes (type-the-word, multiple choice, fill-in-blank), case-insensitive diacritic-aware validator, Fisher-Yates shuffler, WPM→TTS rate converter, hint generator (first letter + dashes), Levenshtein similar-word finder, multiple-choice distractor generator, fill-in-blank generator, phonetic pronunciation guide, word frequency marker, homophone detector, practice state machine, text/CSV renderers, copy + download, history (localStorage), and shareable URL. 100% client-side — no network.

SPF Record Checker

Check SPF (Sender Policy Framework) DNS records. Validate include, a, mx, ip4, ip6, and ~all/-all.

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SPF Record Generator & Validator

Build a valid SPF TXT record from a guided form (ip4, ip6, a, mx, include, redirect, all qualifier — -all / ~all / ?all / +all) and validate any existing record against RFC 7208. Live lookup-count meter tracks the 10 DNS-lookup limit, mechanism-order checker, deprecated ptr warnings, multiple-SPF-record detection, macro warnings, and a dig command generator. Plain-English mechanism explanations and suggested fixes for every validation issue. 100% client-side generation; recursive lookup counting uses an optional include-depth map or a clearly-labeled live-DNS mode.

Split PDF

Split a PDF into multiple files — by custom page ranges, every N pages, or one file per page. Download files individually or all at once. 100% private, runs in your browser.

Split PDF

Split PDF into multiple files by page ranges, every N pages, or by bookmarks.

Split PDF (Advanced)

Split PDF with advanced options. By size, pages, bookmarks, every N pages.

Split PDF (Advanced)

Split PDF with advanced options. By size, pages, bookmarks.

Split PDF by Bookmarks

Split PDF at bookmark locations. Top-level, custom depth, named output.

Split PDF by File Size

Split PDF into parts by target file size. Useful for email attachments.

Split PDF Page into Poster Tiles

Split large PDF pages into multiple tiles for poster printing.

Split PDF Page into Poster Tiles

Split large PDF pages into multiple tiles for poster printing.

Split PDF Two-Page Spreads

Split two-page spreads into single pages. Scanner output correction.

Split PDF Two-Page Spreads

Split two-page spreads into single pages. Scanner output correction.

Sprite Sheet Splitter

Split sprite sheets into individual images. Grid-based or manual selection, batch export.

SQL DDL to ER Diagram Generator

Paste any-dialect SQL DDL (CREATE TABLE / ALTER TABLE) and instantly render an ER diagram as Mermaid erDiagram code, ASCII crow's-foot diagram, and DBML. Detects PKs, UNIQUE, composite keys, inline and table-level foreign keys, ALTER TABLE ADD FOREIGN KEY, and self-referencing FKs. Auto-layout, topological ordering (handles circular FKs), naming-based relationship inference when FKs are absent. 100% client-side, no signup.

SQL Dialect Converter

Convert SQL between MySQL, PostgreSQL, SQLite, SQL Server, and Oracle — deterministically, in your browser. Handles identifier quoting, LIMIT/TOP/ROWNUM, AUTO_INCREMENT/SERIAL/IDENTITY, string concat, date functions, and common data types. Side-by-side change notes; unconvertible constructs are flagged, never silently mistranslated.

SQL EXPLAIN Plan Visualizer

Parse and visualize SQL EXPLAIN / EXPLAIN ANALYZE output (PostgreSQL text + JSON, MySQL JSON, SQL Server XML) as an interactive tree. Per-node scan type, cost, rows (estimate vs actual), timing, loops, buffers. Detects bottlenecks and row-misestimates with plain-English advice. 100% client-side; plans never leave the browser.

SQL Formatter / Beautifier

Format and beautify SQL queries with dialect awareness (MySQL, PostgreSQL, SQLite, SQL Server, ANSI), keyword casing, indentation, comma style, and SELECT-column alignment. Pure in-browser; no network. 100% client-side.

SQL Index Advisor

Paste a SQL query and (optionally) your table DDL; get column-ordered index recommendations with CREATE INDEX statements. Parses WHERE, JOIN, ORDER BY, and GROUP BY clauses; applies equality-before-range column ordering; detects redundant/overlapping existing indexes; warns about write-amplification, low-selectivity columns, and leading-wildcard LIKE. 100% client-side — no DB required.

SQL Join Visualizer

Visualize SQL JOINs interactively — INNER, LEFT, RIGHT, FULL OUTER, CROSS, anti-join, semi-join, and self-join — with row-accurate matching (not misleading Venn diagrams), live result preview, NULL-handling demonstration, duplicate-row multiplication explainer, step-through animation, and copyable generated SQL. 100% client-side, no DB required.

SQL Minifier

Minify and compress SQL queries into a single line — removes comments and redundant whitespace while preserving string literals and quoted identifiers exactly. Dialect-aware (--, #, /* */). 100% client-side.

SQL Result to CSV / JSON Exporter

Convert SQL query results (pasted result grids, INSERT statements, or Markdown tables) to CSV, JSON, NDJSON, TSV, Markdown, or HTML. Smart type inference (int/decimal/boolean/date/NULL), BigInt-safe numerics, escaped quotes, per-column rename/reorder/select, configurable CSV delimiter + quoting. Round-trips with CSV→SQL. 100% client-side.

SQL to ORM Code Converter

Convert CREATE TABLE DDL into idiomatic ORM models for Prisma, Sequelize, TypeORM, Drizzle, SQLAlchemy, and Django — fully offline in your browser. Maps types, nullability, defaults, primary/foreign keys, unique & index constraints, and enums, with snake_case ↔ camelCase field mapping via @map / column-name decorators. Unmappable constructs are flagged, never silently dropped.

SSH Config Generator

Visually build ~/.ssh/config host entries — HostName, User, Port, IdentityFile, IdentitiesOnly, ProxyJump/bastion, ForwardAgent, ServerAlive, Compression, LocalForward/RemoteForward/DynamicForward, StrictHostKeyChecking, Match blocks, and Include directives. Templates (basic server, jump host, GitHub, AWS EC2, wildcard), security linter (warns on StrictHostKeyChecking no / broad ForwardAgent), ed25519 keygen helper per host, import existing config, bulk-add via JSON, first-match-wins reordering, history (localStorage), and shareable URL. 100% client-side — never handles private keys. No ads.

SSH Key Fingerprint Explorer

Parse SSH public keys (RSA, ED25519, ECDSA), compute MD5/SHA256 fingerprints, extract metadata, validate format, and 10+ extras. 100% private.

SSL & HTTPS Checker

Check SSL/HTTPS configuration from URL + HTML. Detect HTTPS protocol, mixed content (active/passive), validate HSTS header, estimate http→https redirect, generate recommendations. Honest disclaimer: this tool does NOT make live HTTPS requests. History (localStorage), shareable URL. 100% client-side.

SSL Expiry Countdown Tracker

Track SSL certificate expiry dates with multi-domain support and warning thresholds. 100% private. 100% private.

SSL/TLS Certificate Decoder & Checker

Decode a pasted PEM X.509 certificate or CSR entirely in your browser — extract subject, issuer, validity, SAN list, key type/size, signature algorithm, serial, and SHA-1/SHA-256 fingerprints; check expiry with a live countdown; verify chain order across multiple pasted PEMs; match SANs against a hostname (wildcard-aware); flag weak signature algorithms (MD5/SHA-1) and short RSA keys (<2048); and generate the exact openssl commands (s_client, x509 -text, fingerprint, verify chain, SAN extraction) for live-host checks. 100% client-side parsing — your PEM never leaves the browser.

SSL/TLS Certificate Validator

Validate SSL/TLS certificates. Check expiry, chain, hostname, and common misconfigurations.

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SSL/TLS Cipher Suite Analyzer

Analyze SSL/TLS cipher suites. Check strength, key exchange, encryption, and MAC for each cipher.

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Stamp Duty Calculator

Calculate stamp duty/transfer tax by jurisdiction with thresholds and rates. 100% private. 100% private.

Standard Deviation Calculator

Calculate mean, median, mode, std dev, variance, and range from data set. 100% private. 100% private.

Steps to Miles Converter

Convert steps to miles/km with stride length and calorie burn. 100% private. 100% private.

Stock Ticker Widget Customizer

Customize stock ticker widget with symbol and interval selection. 100% private. 100% private.

Story Template Generator

Generate social media story templates for Instagram, Snapchat, Facebook. 100% private. 100% private.

String Escape (JS/JSON/SQL)

Escape strings for JavaScript, JSON, SQL, HTML, regex contexts.

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String Escape (JS/JSON/SQL)

Escape strings for JavaScript, JSON, SQL, HTML, regex contexts.

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String Reverser

Reverse strings character by character, word by word, or by sentence.

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Strong Password Generator

Generate cryptographically-secure random passwords and EFF passphrases using crypto.getRandomValues with bias-free rejection sampling. Per-class minimums, exclude-ambiguous, pronounceable mode, batch + CSV export, and 10+ extras. No caps, no ads, no upload.

Structured Data Validator

Validate JSON-LD structured data against Schema.org types. Detect schema type, validate required fields, suggest recommended fields, multi-schema support, Google Rich Results link, Schema.org docs link, history, shareable URL. 100% client-side.

Study Notes Organizer

Organize study notes by subject, topic, tags, and search. Pipe-separated input, subject/topic/tag grouping, full-text search, duplicate detector, tag cloud, summary stats. Export as TXT, HTML, Markdown, CSV, JSON. 100% client-side, no upload.

Study Planner & Exam Timetable

Plan study schedules for exams — break subjects into daily study blocks with Pomodoro-style sessions, breaks, and revision days. Days-until-exam calculator, auto-adjusted chapters-per-day, weekly timetables, per-day session blocks with time slots, holiday/exclusion support, per-chapter difficulty markers, text/CSV/HTML export, history (localStorage), shareable URL. 100% client-side — no network.

Subdomain Finder (Reference)

Reference tool for subdomain enumeration methods. Generate DNS queries and certificate transparency searches.

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Subnet CIDR Merger

Merge multiple CIDR blocks into summarized ranges. 100% private. 100% private.

Subnet Mask Validator

Validate subnet masks, convert CIDR to dotted decimal, check validity. 100% private. 100% private.

Subtitle Editor (SRT VTT)

Edit SRT/VTT subtitles with time adjustment, search, and format conversion. 100% private. 100% private.

SVG Optimizer & Minifier

Optimize and minify SVG files. Remove metadata, simplify paths, strip comments, dedupe.

SVG Path Editor

Edit SVG paths visually. Move points, add/remove, arc/line/curve.

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SVG to JSX Converter

Convert SVG to JSX/React component. Props, className, TypeScript.

SVG to PDF

Convert SVG images to PDF. Renders SVG at high resolution and embeds as a page. Supports custom page size and margins. 100% private, runs in your browser.

SVG to PNG Converter

Convert SVG files to PNG at custom resolutions. Bulk conversion, transparency preservation.

Syllable Counter

Count syllables in words and sentences with heuristic and dictionary modes. 100% private. 100% private.

Systemd Service Unit Generator

Generate systemd service unit files. ExecStart, restart, environment.

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Tailwind to CSS Converter

Convert Tailwind utility classes to standard CSS. Expand @apply.

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Tailwind to CSS Converter

Convert Tailwind utility classes to standard CSS. Expand @apply.

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tar Archive Command Builder

Build correct tar commands from a visual UI — create / extract / list / append modes, compression (gzip .gz / bzip2 .bz2 / xz .xz / zstd .zst), verbose, exclude patterns, strip-components, target dir -C, format selector (gnu/posix/ustar/pax), preserve permissions/xattrs. Auto-matching compression flag + extension, tar-bomb and absolute-path guards, per-flag plain-English explanation, recipe library, history (max 20), shareable URL. 100% client-side — commands are generated, never executed.

TAR Extractor

Extract files from .tar archives in the browser — pure JavaScript TAR parser (USTAR format), no WASM. File tree view, search, filter by type, preview text files, download individual files or all as ZIP. Shows file permissions and modification times. 100% client-side.

Tax Calculator (Income / Sales / VAT / CGT)

Calculate income tax (progressive brackets — US, UK, India), sales tax (US state lookup), VAT (UK, DE, FR, IN GST) and capital gains (long-term vs short-term). Multi-country, multi-year, multi-filing-status. Computes effective rate, marginal rate, net income, and breakdown by bracket. Export as text or CSV. 17 extra features: 4 tax types, 7 country presets, multi-bracket progressive calc, 3 filing statuses, 3 tax years, sales tax with US state lookup, VAT with country rates, capital gains LT/ST, deduction applier, effective rate, marginal rate, text/CSV renderers, history (localStorage), shareable URL, summary stats. 100% client-side.

Tax Calculator Pro

Calculate income tax with brackets, deductions, credits, and multi-year comparison. 100% private. 100% private.

TCR to EPUB Converter

Convert TCR (Psion) ebooks to EPUB format in your browser. Parses the TCR header (magic PCF), reads the 256-entry code dictionary, decodes the compressed text stream, splits into chapters, generates a complete EPUB with NCX + NAV TOC, and packages as a .epub ZIP. 100% client-side.

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, Rankine, and 10+ extras. 100% private.

Terms & Conditions Generator

Generate Terms & Conditions for websites, apps, and SaaS. Customizable for different jurisdictions.

Test / Dummy File Generator

Generate dummy files of an exact byte size — TXT, CSV, JSON, XML, HTML, PNG (solid color), binary, ZIP (real archive), or PDF. Bulk generate with {n} naming patterns. Random / zeros / lorem / pattern content. All client-side via Blob — nothing uploaded.

Test Data Anonymizer / Data Masking Tool

Detect and anonymize PII in CSV/JSON/free-text — emails, phones, SSNs, credit cards, names, addresses, IPs, ZIPs, DOBs. Five masking strategies (mask, pseudonymize, generalize, fake, format-preserving) with deterministic seeded mapping for referential integrity. Format-preserving masks keep Luhn-valid cards, valid email shape, and valid phone digits. 100% client-side — your real data never leaves the browser.

Test ID Generator (SSN / Tax / National ID)

Generate clearly-fake, format-valid national identifiers for testing — US SSN/EIN/ITIN, UK NINO, India PAN/Aadhaar, German Steuer-ID, Brazil CPF/CNPJ, Canada SIN, Spain NIF, France INSEE. Uses reserved/never-issued ranges where defined (SSN area 900-999, ITIN 9XX-7X-XXXX, SIN prefix 9, NINO prefix TN), correct per-country checksums (Verhoeff, Luhn, mod-11, mod-23, mod-97), validate any ID, bulk export to CSV/JSON/text. 100% client-side — test only, never real.

Text (TXT) to PDF

Convert plain text files to PDF. Font, size, margins, page size.

Text Aligner

Align text left, right, center, or justified with custom width. 10+ extras. 100% private.

Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more. 100% private.

Text Column Formatter

Format text into columns with custom width, padding, alignment, and separators. 10+ extras. 100% private.

Text Deduplicator

Remove duplicate lines, words, or paragraphs. Fuzzy matching, case-insensitive, and 10+ extras. 100% private.

Text Diff Compare

Compare two text blocks line by line. Unified diff, side-by-side, highlight.

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Text Diff Compare

Compare two text blocks line by line. Unified diff, side-by-side.

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Text Encoder / Decoder

Encode/decode Base64, URL, HTML entities, Hex, ROT13, Binary, and 10+ extras. 100% private.

Text Encoding Converter

Convert text files between UTF-8, UTF-16 LE/BE, ASCII, Latin-1, Windows-1252. Add/strip BOM, batch files, and 10+ extras. 100% private.

Text Entropy Calculator

Calculate Shannon entropy, character frequency, and randomness score of text. 10+ extras. 100% private.

Text File Joiner

Merge multiple text files (.txt, .log, .md, .csv, .json) into one with custom separators, filename headers, line numbering, dedup, sorting, and stats. 100% client-side, no upload.

Text Finder & Replacer

Find and replace text with regex, case-sensitive, whole-word, and batch mode. With 10+ extras. 100% private.

Text Indentation Fixer

Fix indentation: convert tabs to spaces, normalize depth, detect mixed indentation. 10+ extras. 100% private.

Text Mirror Generator

Mirror text horizontally (backwards) and vertically (upside down). 100% private. 100% private.

Text Redactor

Redact sensitive data: emails, phone numbers, SSNs, credit cards, IPs, and custom patterns. 10+ extras. 100% private.

Text Reducer

Reduce text length while preserving meaning: extractive summarization, sentence scoring. 100% private. 100% private.

Text Repeater

Repeat text N times with separators, prefix/suffix, numbered sequences, and patterns. Useful for testing, padding, and dummy data. 10+ extras. 100% private.

Text Reverser

Reverse text by characters, words, lines, or sentences. Multiple modes, preserve case, mirror text, and 10+ extras. 100% private.

Text Scrambler

Scramble text letters while keeping first and last letter intact. 100% private. 100% private.

Text Sorter

Sort text lines, words, paragraphs, or CSV columns. 6 sort algorithms, natural number sort, locale-aware, and 10+ extras. 100% private.

Text Statistics Analyzer

Analyze text: word count, sentence count, reading time, syllable count, readability score, and 10+ extras. 100% private.

Text to Array/List Converter

Convert text to array format. JS, Python, JSON, CSV, custom separator.

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Text to Array/List Converter

Convert text to array format. JS, Python, JSON, CSV, custom separator.

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Text to Hex Converter

Convert text to hex string. 100% private. 100% private.

Text to PDF

Convert plain text to a PDF document. Choose font size, page size (A4/Letter), and orientation. Supports line wrapping and multi-page output. 100% private, runs in your browser.

Text Trimmer

Trim whitespace, leading/trailing characters, empty lines, and more. Multi-line batch, custom char trim, and 10+ extras. 100% private.

Text Width Measurer

Measure text width in pixels for various fonts and sizes. Canvas-based with 10+ extras. 100% private.

Text Word Reverser

Reverse word order in each line. With options for keeping punctuation. 100% private. 100% private.

TF-IDF Content Optimizer

Analyze content using Term Frequency-Inverse Document Frequency (TF-IDF). Compare to competitor content, identify important terms, find missing terms, flag over-optimization, compute content score, CSV export, history, shareable URL. 100% client-side.

TikTok Video Description Generator

Generate TikTok video descriptions optimized for the For You page. 8 video style presets (dance, comedy, tutorial, story-time, day-in-life, transition, challenge, trend), 5 target audience presets, style-specific openers, hook generator (first 3 seconds), 3-5 hashtag mix (trending + niche + branded), trending sound suggester (60+ sounds by category), style-aware CTA generator (duet, stitch, follow, comment), emoji appender, char-count validator (300 optimal, 2200 max), viral potential scorer, best time to post suggestion, 3 variations per request, summary stats, CSV export, history (localStorage), shareable URL. 100% client-side.

Tiling Pattern Maker

Create seamless tiling patterns from images with mirror/offset modes. 100% private. 100% private.

Time Duration Calculator

Add, subtract, multiply and divide time durations. Find the duration between two clock times (cross-midnight aware). Totalize multiple timesheet rows with break subtraction. Convert HH:MM:SS to decimal hours and back. 12/24h clock support, mixed-unit normalization (75s = 1m15s), multi-segment totals with CSV export. Shareable URL. 100% client-side.

Time Tracker

Track time spent on tasks and projects — start/stop/pause timer, project tags, billable hours, hourly rates. Daily/weekly summaries, project breakdowns, time rounding (6/15/30 min for billing), CSV/text reports, history (localStorage), shareable URL. 100% client-side.

Time Unit Converter

Convert between every time unit — nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, years, decades, centuries — with explicit, switchable month (28/30/30.44/31) and year (365/365.25/366) definitions. BigInt-safe down to nanoseconds, so even huge magnitudes stay exact. Single input fans out to all units. Humanize mode ('1d 1h 1m 1s'), inverse parser, dev units (ticks, jiffies, frames@fps) and JS/Python code snippets. 100% client-side.

Time Zone Abbreviation & UTC Offset Reference

Searchable reference of 200+ time zone abbreviations (EST, PST, GMT, CET, JST, UTC+05:30, …) with full names, UTC offsets, DST status, IANA equivalents, and example cities. Resolves ambiguous abbreviations (CST, IST, BST, AMT) to all candidate zones. Live 'now in this zone' readout. 100% client-side, offline.

Time Zone Converter

Convert a date and time from one time zone to many others — DST-aware for any past or future date. City/zone autocomplete mapped to IANA ids. Shows UTC offset, abbreviation (IST/PST/etc.) and DST-active flag. Detects spring-forward gaps and fall-back overlaps. Live 'now' mode. Difference summary. Shareable link. 100% client-side.

Time-Lapse Maker

Create time-lapse from image sequence with frame rate control. 100% private. 100% private.

Timesheet Calculator

Calculate work hours from clock in/out times with breaks and overtime. 100% private. 100% private.

Timesheet Generator

Generate weekly / bi-weekly / semi-monthly / monthly timesheets from clock-in/out entries. Per-entry worked hours with break deduction, weekly totals, overtime (threshold + 1.5x), regular vs overtime pay, gross pay, daily breakdown, weekly summary, text + CSV + printable HTML export, history (localStorage), shareable URL, summary stats, time formatter, break presets. 100% client-side.

Tip Calculator

Calculate tip + total bill with custom %, split between N people, round-up options, and per-person breakdown. Includes tax handling and 10+ extras. 100% private.

Title & Meta Description Pixel Checker

Check pixel width of titles and meta descriptions for SERP truncation. Desktop vs mobile limits, character & word counts, batch mode, sort by pixel width, CSV export, SERP preview, history, shareable URL. 100% client-side.

Title Tag Optimizer

Optimize title tags for SEO and CTR. Character count, pixel width (512px), keyword position, power words, CTR estimate, suggestions, A/B compare, SERP preview, history. 100% client-side.

Title Tag Optimizer & CTR Estimator

Optimize title tags with pixel-accurate preview (desktop + mobile), keyword-position + brand-suffix + power-word checks, a title-quality score, and a position-aware CTR estimate based on published CTR curves. Includes bulk audit + A/B variants. 100% client-side.

TLS Version Reference

Reference for TLS 1.0-1.3 versions, ciphers, deprecation status. 100% private. 100% private.

tmux Config Generator & Cheatsheet

Build a .tmux.conf from a UI — prefix key (C-b / C-a / C-Space), mouse, base-index, history limit, escape-time, vi/emacs mode, split bindings, status bar (position/colors/left/right), and TPM plugin wiring. Version-aware (2.9 vs 3.x style syntax). Live preview with per-line comments + searchable 60+ keybinding cheatsheet reflecting YOUR custom bindings. 100% client-side.

TOML to JSON Converter

Convert TOML configuration to JSON. Tables, arrays, inline tables.

DeveloperComing Soon

Tone Analyzer

Analyze text tone: formal/casual, positive/negative, confident/tentative. 100% private. 100% private.

Tone Generator

Generate pure tones at custom frequencies (20Hz-20kHz) with volume and duration. 100% private. 100% private.

Topic Cluster Builder

Build topic cluster maps with pillar page, supporting cluster content, subtopics, and internal link recommendations. Audience-aware subtopic generation (beginner/intermediate/advanced), cluster page title suggestions, content briefs with word count estimates, internal link matrix, JSON cluster map export, CSV export, history (localStorage), shareable URL. 100% client-side.

Tor Node Checker

Check if an IP is a known Tor exit node. Reference database of Tor exit relays.

NetworkComing Soon

TOTP & HOTP Generator

Generate RFC 6238 TOTP, RFC 4226 HOTP, and Steam Guard codes. Multi-account management, QR otpauth URI, backup codes, time-skew warning, next-N codes preview, and code history. 100% private, works offline.

TOTP/2FA Code Generator

Generate TOTP 2FA codes from secrets. 6/8 digits, 30s/60s period.

TOTP/2FA Code Generator

Generate TOTP 2FA codes from secrets. 6/8 digits, 30s/60s period.

DeveloperComing Soon

Traceroute Online (Reference)

Reference tool for traceroute. Generate traceroute commands and understand network paths.

NetworkComing Soon

Traceroute Visualizer

Generate ready-to-paste tracert (Windows), traceroute (Linux/macOS) and mtr commands with hop-limit, timeout, probe-count and no-resolve flags. Paste any traceroute / tracert / mtr output and parse it into a structured hop list (hop number, IP, hostname, RTT × N) — visualized as a table, an ASCII latency graph, and CSV/JSON exports. Highlights the slowest hop, the biggest inter-hop latency jump, timeouts (*), private RFC1918 hops and IPv6 hops. 100% client-side — actual traceroute requires the OS CLI; this tool generates commands and parses pasted output.

Transparent PNG Maker

Remove solid color background to create transparent PNG with tolerance and feather. 100% private. 100% private.

Trie (Prefix Tree) Visualizer

Step-by-step visualization of a Trie (prefix tree) — insert, search, delete (with node pruning), and autocomplete — with animated character path, end-of-word markers, and shared-prefix highlighting. Live node count, word count, and space-savings metrics showing how shared prefixes save memory. Longest-common-prefix display. Optional compressed (radix / Patricia) trie view. Bulk insert from a word list. Step / reverse / play / speed controls and shareable state URLs. 100% client-side.

Trim Whitespace

Trim leading/trailing whitespace. Collapse multiple spaces, remove empty lines.

DeveloperComing Soon

TSConfig JSON Generator

Generate tsconfig.json files. Target, module, strict, paths, JSX.

DeveloperComing Soon

TSV to CSV Converter

Convert TSV (tab-separated) to CSV (comma-separated) with RFC 4180 compliant output and proper quoting. Custom input/output delimiters, batch convert multiple files, trim whitespace, remove empty rows, skip header, and preview. 100% client-side.

Tweet Thread Planner

Plan and format Twitter/X threads from long content. Breaks text into tweet-sized chunks (≤280 chars), generates a hook tweet, a CTA tweet, applies 1/2/3 numbering, inserts transition words between tweets, and supports 5 tones (informational, controversial, storytelling, listicle, thread-bois). Plus char-limit validator, flow validator, engagement score estimator, 2 alt-variations, best-time-to-post suggestion, summary stats, CSV/text export, history (localStorage), shareable URL. 100% client-side.

Twitter Card Preview Tool

Preview how your URL will look when shared on Twitter/X. Validate twitter:card meta tags, see summary vs summary_large_image vs player cards, and 10+ extras. 100% private.

Two's Complement / Signed Integer Calculator

Convert between signed decimal and two's-complement binary at any width (4/8/16/32/64-bit or custom up to 256-bit). Step-by-step negation (invert → +1), one's-complement and sign-magnitude side-by-side, clickable bit grid with MSB sign bit highlighted, hex/octal views, range & overflow detection, and sign-extension / truncation visualization. BigInt-correct, fully client-side.

TypeScript Playground

Compile and run TypeScript in browser. Type checking, ES features.

DeveloperComing Soon

TypeScript to JavaScript Compiler

Compile TypeScript to JavaScript. Target ES5-ES2024, module formats.

DeveloperComing Soon

TypeScript to JavaScript Compiler

Compile TypeScript to JavaScript. Target ES5-ES2024, module formats.

DeveloperComing Soon

Typewriter Effect Generator

Generate typewriter effect text with speed control for HTML/animation. 100% private. 100% private.

Typing Practice & WPM Test

Practice typing with timed tests (1/3/5 min), custom text, or word-count goals. Measure WPM, accuracy, and error count in real time. Built-in pools of common English words (200+), famous quotes (20+), code snippets (10+ JS/Python), and numbers. Standard WPM formula ((correctChars/5)/minutes), accuracy calculator, per-character diff (correct/incorrect/missed/extra), case-insensitive mode, cursor position tracker, test state machine, result history (localStorage, last 20), text/CSV renderers, copy + download, shareable URL, and summary stats (best WPM, avg WPM, avg accuracy, total tests). 100% client-side — no network.

ULID Generator

Generate ULIDs (Universally Unique Lexicographically Sortable IDs).

DeveloperComing Soon

Unicode Escape/Unescape

Convert between Unicode characters and \uXXXX escape sequences.

DeveloperComing Soon

Unicode Explorer

Inspect Unicode code points, names, blocks, categories, and UTF-8/16/32 encoding. 10+ extras. 100% private.

Unit Conversion Tutor

Interactive unit conversion tutor with step-by-step explanations. 100% private. 100% private.

Unit Converter (Educational, with Steps)

Convert between 59+ units across 10 categories (length, mass, temperature, time, area, volume, speed, digital storage, energy, pressure) and see every conversion step — formula, substitution, and result. Special non-multiplicative temperature formulas (C↔F↔K), adjustable precision (0-10 decimals), step-by-step text and CSV renderers, copy + multi-download, history (localStorage, last 20), shareable URL, summary stats by category, unit search/filter, 6 common-conversion presets (mile→km, kg→lb, etc.), bi-directional auto-fill, and per-category formula reference table. 100% client-side — no network.

Unix Timestamp / Epoch Converter

Convert between Unix timestamps and human-readable dates both directions. Auto-detects seconds / milliseconds / microseconds / nanoseconds with BigInt precision. Multi-epoch support: UNIX, JS ms, Windows FILETIME, LDAP/NT, NTP, Cocoa/Apple (2001), Excel serial, Mongo ObjectId. Outputs ISO 8601, RFC 2822, locale, day-of-week, relative. Batch convert thousands of rows. 100% client-side.

Unlock PDF (Remove Password)

Remove password protection from PDF (if you know the password). Strip encryption.

URL Decoder

Decode URL-encoded strings. 100% private. 100% private.

URL Encode/Decode

Encode/decode URL components. Percent-encoding for query params, paths, fragments.

DeveloperComing Soon

URL Encoder / Decoder

Encode URLs or components for safe transmission, or decode percent-encoded URLs back to plain text. UTF-8 safe.

URL Parser

Decode, normalize, build, compare, and lint URLs — supports HTTP/HTTPS/FTP/file/mailto/tel/ws/wss/data/blob. Phishing detection, redirect hints, Punycode IDN, encoded-char highlight, and URL diff. 100% client-side.

URL Sandbox Link Scanner

Scan URLs for suspicious patterns. Generate sandboxed viewing links and check reputation references.

NetworkComing Soon

URL-safe Base64

Encode/decode URL-safe Base64 (- and _ instead of + and /).

User Agent Generator

Generate user agent strings for browsers, devices, and bots. 100% private. 100% private.

User Agent Parser

Parse any User-Agent string into browser, engine, OS, CPU, device, and bot/AI-crawler classification. Uses Client Hints when available. 100% client-side.

User-Agent String Generator & Parser

Parse any User-Agent string into browser, engine, OS, CPU, device, and bot info — or generate realistic random UAs (Chrome, Firefox, Safari, Edge, mobile, bots) weighted by market share. Bulk export to CSV/JSON/Playwright array. 100% client-side.

UTF-8 Byte Viewer

View text as UTF-8 bytes. Hex, binary, decimal, character mapping.

DeveloperComing Soon

UTF-8 Byte Viewer

View text as UTF-8 bytes. Hex, binary, decimal, character mapping.

DeveloperComing Soon

UTM URL Builder

Build UTM campaign tracking URLs for Google Analytics. Source/medium presets, campaign templates, bulk builder, URL validation, QR code of URL, and GA4 compatibility note. 100% client-side.

UUID Generator

Generate RFC 4122 v4 UUIDs in bulk, with optional hyphens, uppercase, and prefix options. Uses crypto.randomUUID — 100% private.

UUID Generator v2

Generate UUID v1, v3, v4, v5. Bulk generation, format options, validation.

DeveloperComing Soon

UUID v1 Generator

Generate UUID v1 (time-based). Bulk, format options, MAC address.

DeveloperComing Soon

UUID v1 Generator

Generate UUID v1 (time-based). Bulk, format options, MAC address.

DeveloperComing Soon

UUID v4 Generator

Generate UUID v4 (random). Bulk, format options, validation.

DeveloperComing Soon

UUID v4 Generator

Generate UUID v4 (random). Bulk, format options, validation.

DeveloperComing Soon

UUID v5 Generator

Generate UUID v5 (namespace+name). DNS, URL, OID, custom namespace.

DeveloperComing Soon

UUID v5 Generator

Generate UUID v5 (namespace+name). DNS, URL, OID, custom namespace.

DeveloperComing Soon

UUID Version Detector

Parse UUIDs, detect version (v1-v5), validate format, extract timestamp, and 10+ extras. 100% private.

var to let/const Converter

Convert var declarations to let/const. Scope analysis, const detection.

DeveloperComing Soon

Video Aspect Ratio Changer

Change video aspect ratio with crop, pad, and blur background modes. 100% private. 100% private.

Video Bitrate Guide

Calculate recommended bitrate for streaming/recording by resolution and FPS. 100% private. 100% private.

Video Compression Guide

Guide for video compression: codec selection, CRF settings, resolution scaling. 100% private. 100% private.

Video Compressor

Compress video files entirely in the browser — reduce file size by lowering bitrate, resolution, and frame rate. Drag-and-drop or pick a video, play it through a hidden <video> + <canvas> + MediaRecorder pipeline at the chosen settings, and download the smaller output as WebM (or MP4 where supported). Bitrate presets (4: 500kbps to 5Mbps), resolution presets (5: 240p to 1080p), aspect-ratio-aware resolution calculator, frame-rate presets (3), compression ratio calculator, file-size estimator, quality score calculator (0-100), format support lookup (webm/mp4), codec support lookup (VP8/VP9/H.264/AV1), filename generator, history (localStorage), shareable URL, video preview before/after, and summary stats (input size, output size, % reduction, compression ratio, quality score). 100% client-side.

Video Format Reference

Reference for video formats (MP4, WebM, AVI, MKV, MOV). 100% private. 100% private.

Video FPS Reference

Reference for frame rates (24/25/30/50/60/120/240), use cases, and conversion. 100% private. 100% private.

Video Frame Extractor

Extract still frames from a video file entirely in the browser. Three modes: single frame at a timestamp, a sequence at multiple timestamps, or an interval (every N seconds). Output formats: PNG, JPEG, or WebP. JPEG quality presets (50/75/90/100%). Frame filename generator (frame-001.png), frame count calculator, resolution scaling (full/half/quarter), pure-JS ZIP archive builder for bundling multiple frames, text + CSV reports, history (localStorage), shareable URL, and summary stats. 100% client-side — uses HTML5 <video> seeked event and Canvas toBlob, with requestVideoFrameCallback when available.

Video Loop Maker

Loop video clips N times with seamless transitions. 100% private. 100% private.

Video Merger Reference

Reference for video merging: concatenation, transitions, format compatibility. 100% private. 100% private.

Video Metadata Viewer

Inspect video file metadata entirely in the browser. Drag-and-drop a video (mp4, webm, ogg, mov, avi, mkv, flv) and read container, codec, resolution, frame rate, duration, bitrate, audio tracks, and more. Pure-JS file-type detector (magic bytes + extension), MIME type lookup, codec name lookup (H.264, VP9, AV1, AAC, Opus, Vorbis), bitrate calculator + formatter (bps/kbps/Mbps/Gbps), file size formatter, duration formatter (HH:MM:SS.ms), aspect ratio calculator, resolution labeler (Full HD, 4K, 8K), 8 common resolution presets, 10 frame-rate presets, container/codec compatibility checker, text + CSV reports, history (localStorage), shareable URL, and summary stats. 100% client-side.

Video Schema Generator (VideoObject JSON-LD)

Generate VideoObject JSON-LD schema markup for videos. Duration converter (HH:MM:SS / MM:SS / seconds → ISO 8601 PT), schema validator, HTML script tag wrapper, BreadcrumbList companion schema, Clip schema for chapters, SeekToAction schema, Google rich results compliance check, CSV export, history (localStorage), shareable URL. 100% client-side.

Video Trimmer

Trim video files to a start/end timestamp range entirely in the browser. Drag-and-drop or pick a video, play it through a hidden <video> + <canvas> + MediaRecorder pipeline, and download the trimmed portion as a WebM (or MP4 where supported). Multi-format time parser (4 formats), trim validation, output-format support lookup, file-size estimator (bitrate × duration), 4 bitrate presets, 4 frame-rate presets, 4 resolution presets, 5 fade in/out presets, filename generator, history (localStorage), shareable URL, video preview before/after, and summary stats (original duration, trimmed duration, % removed, output size). 100% client-side.

Vim Cheatsheet & Keybinding Reference

Searchable, interactive Vim/Neovim cheatsheet with 100+ commands across movement, editing, insert, visual, search/replace, registers, marks, folding, windows/tabs, and exiting. Includes an interactive keyboard map (per-mode meanings), a verb+noun grammar explainer (operator × motion × text-object), reverse intent lookup ('delete inside quotes' → di"), and a .vimrc snippet generator. 100% client-side.

VirusTotal-style Online Scanner Reference

Reference tool for multi-engine URL/file scanning. Generate links to VirusTotal, Hybrid Analysis, etc.

NetworkComing Soon

Visual PDF Diff (Pixel Overlay)

Visual pixel-by-pixel PDF comparison. Overlay differences, highlight changes.

Visual SQL Query Builder

Build SQL SELECT queries visually — pick tables, choose columns, add WHERE filters, JOINs, GROUP BY, HAVING, ORDER BY, LIMIT/OFFSET — and generate clean, dialect-correct SQL live. No DB connection, 100% client-side. Supports MySQL, PostgreSQL, SQLite, SQL Server, ANSI.

Vocabulary Builder & Study Modes

Build vocabulary lists with word, definition, example sentence, synonyms, and antonyms. Study with browse, flashcard, and match-game modes. Multi-format parser (pipe, comma, JSON), word validator + normalizer, synonym/antonym parser + deduper, auto difficulty marker (1-5), search filter, alphabetical sorter, Fisher-Yates randomizer, flashcard deck builder, match-game pair generator + validator, text/CSV/JSON renderers, copy + multi-download, history (localStorage), shareable URL, summary stats, word frequency analyzer, and 4 vocab presets (SAT, GRE, TOEFL, elementary). 100% client-side — no network.

Vocabulary Trainer

Flashcard-style vocabulary trainer with spaced repetition simulation. 100% private. 100% private.

Watermark PDF

Add text or image watermark to PDF. Position, opacity, rotation, font customization.

Watermark PDF (Advanced)

Add advanced watermarks to PDF. Text/image, position, opacity, rotation.

Watermark PDF (Advanced)

Add advanced watermarks to PDF. Text/image, position, opacity.

Wave Divider SVG Generator

Generate SVG wave dividers for website section transitions. Customizable amplitude, frequency, color.

Webhook Tester & Inspector

Inspect incoming webhooks. Generate test URLs, view payloads, headers, verify signatures.

DeveloperComing Soon

Webhook Tester & Inspector

Inspect incoming webhooks. Generate test URLs, view payloads, signatures.

DeveloperComing Soon

WebP Animation Maker

Create animated WebP files from multiple images. Smaller than GIF, better quality.

Webpage (URL) to PDF

Convert webpage URL to PDF. Print-friendly, capture full page.

Webpage (URL) to PDF

Convert webpage URL to PDF. Print-friendly, capture full page.

WebRTC Leak Test

Detect WebRTC IP leaks that can expose your real IP even behind VPN. Includes fix instructions.

NetworkComing Soon

WebSocket Client Tester

Test WebSocket connections. Send/receive messages, inspect frames, ping/pong.

DeveloperComing Soon

WebSocket Client Tester

Test WebSocket connections. Send/receive messages, inspect frames.

DeveloperComing Soon

Week Number (ISO 8601) Calculator

Calculate the ISO 8601 week number for any date and the reverse (year + week → date range). Supports ISO 8601 (Mon-start, week 1 = first Thursday), US (Sun-start), Simple (Jan 1-7), and Middle-Eastern (Sat-start) conventions. Whole-year week grid. Week-53 detection. Cross-year boundary handling. 100% client-side.

Weight / Mass Converter

Convert between 15+ weight units: kg, lb, oz, ton, gram, carat, stone, and 10+ extras. 100% private.

Well-Known / Common Ports Reference

Instant, offline-searchable reference of 100+ common TCP/UDP ports and their services (HTTP 80, HTTPS 443, SSH 22, FTP 21, SMTP 25, DNS 53, RDP 3389, MySQL 3306, PostgreSQL 5432, Redis 6379, MongoDB 27017, …). Two-way search by port number or service name, TCP/UDP/both filter, well-known (0–1023) / registered (1024–49151) / dynamic (49152–65535) grouping, category tags (web, mail, db, remote, file-transfer, …), security notes for risky ports (Telnet 23, RDP 3389, SMB 445), encrypted-alternative hints (FTP → FTPS, HTTP → HTTPS, Telnet → SSH), range view, and copy/export a custom cheat sheet. 100% client-side — the IANA/Wikipedia-derived dataset is bundled and runs entirely offline.

White Pink Noise Generator

Generate white, pink, and brown noise for focus, sleep, and testing. 100% private. 100% private.

Whitespace/Invisible Char Detector

Detect invisible characters in text. Tabs, spaces, zero-width, BOM.

WHOIS Domain & IP Lookup

Generate WHOIS query commands (whois CLI, RDAP URL) for any domain or IP, parse raw WHOIS response text into a structured card (registrar, created/updated/expiry dates, nameservers, EPP status codes explained, DNSSEC flag), detect the RIR for an IP (ARIN/RIPE/APNIC/LACNIC/AFRINIC), and generate domain-availability checker commands. EPP status code explainer with plain-English descriptions, expiry countdown, IDN/punycode handling, bulk lookup, TLD→WHOIS-server map. 100% client-side — generates commands and parses pasted output only; actual lookups require the network.

WHOIS Domain Checker (Reference)

Generate WHOIS lookup commands and reference for domain registration info.

NetworkComing Soon

WiFi Password Generator

Generate strong WiFi passwords (WPA2/WPA3 compatible). 100% private. 100% private.

WIM Extractor

Extract files from Windows Imaging Format (.wim) files in your browser. Parses the WIM header (signature MSWIM\0\0\0), reads the resource table, lists images, and extracts files from each image. 100% client-side. Browse, search, filter, preview, and download individual files or all as ZIP.

Word & Character Counter

Live, Unicode-correct word, character, sentence, paragraph, and line counts with reading time, SMS segments, and platform-limit meters. 100% private.

Word Cloud Data Generator

Generate word frequency data for word clouds with stop word removal. 100% private. 100% private.

Word Search Maker

Generate word search puzzles with custom words, grid size, and difficulty. 100% private. 100% private.

Word/Character/Line Counter

Count words, characters, lines, sentences, paragraphs in text.

DeveloperComing Soon

Word/Character/Line Counter

Count words, characters, lines, sentences, paragraphs in text.

DeveloperComing Soon

Work Hours Calculator

Calculate work hours between two times — handles overnight shifts, breaks, and overtime. Time parser (12h AM/PM and 24h), break deduction, daily overtime threshold with 1.5x multiplier, regular vs overtime pay, effective hourly rate, summary stats, 6 shift presets, break presets, text + CSV export, history (localStorage), shareable URL. 100% client-side.

Work Order Generator

Generate work orders with line items, labor, materials, totals. 100% private. 100% private.

World Clock & Meeting Planner

Show the current time across 400+ cities and find the best meeting slot across time zones with a color-coded 24-hour grid. Per-zone work hours, weekend definition, DST-aware. Best-slot finder ranks top suggestions. Export to .ics, Google Calendar, Outlook. Shareable URL. 100% client-side.

XAR Extractor

Extract files from XAR (eXtensible Archive) — Apple's archive format with XML TOC + heap. Parses the XAR header, decompresses the XML Table of Contents, lists files with sizes/types, lets you preview, download individual files or re-package as ZIP. 100% client-side.

XML Escape/Unescape

Escape and unescape XML special characters. 100% private. 100% private.

XML Sitemap Generator

Generate XML sitemaps for Google/Bing search engines. Bulk URL input, lastmod/changefreq/priority per URL, sitemap index support, robots.txt integration, and stats. 100% client-side.

XML to JSON Converter

Convert XML to JSON with attribute handling, namespace support, array detection, CDATA preservation, pretty-print, custom attribute prefix and text key. Includes reverse JSON→XML, drag-drop, validation, and history. 100% client-side.

XML to JSON Converter

Convert XML to JSON. Attributes, namespaces, arrays, text content.

DeveloperComing Soon

XOR Cipher

Encrypt/decrypt with XOR cipher. Hex/text key, UTF-8 safe.

DeveloperComing Soon

Xps To Pdf Converter

Convert files between formats using client-side libraries. Privacy-first, no upload, with 10+ extras. 100% private.

XSS Code Sanitizer

Sanitize HTML against XSS with context-aware output encoding and allowlists. 100% private. 100% private.

YAML to JSON Converter

Convert YAML to JSON. Multi-document, anchors, custom tags.

DeveloperComing Soon

YouTube Thumbnail Text Overlay

Generate text overlay suggestions for YouTube thumbnails — what text to put, where to place it, what font size, and which high-contrast color combo to use. 8 video category presets (tech, education, gaming, vlog, tutorial, review, music, comedy), 4 thumbnail style presets (face-cam, screenshot, illustration, text-only), 3 text-length presets (short/medium/long), keyword extractor, number extractor ($1M, 30 days, etc.), text shortener (1-7 words), position recommender (5 positions with reasoning), font size calculator, color recommender (10+ high-contrast combos), font recommender (5 display fonts), 3 variation generator, category-based template selector, CTR predictor, A/B test suggestion, history (localStorage), shareable URL. 100% client-side.

YouTube Video SEO Optimizer

Optimize YouTube video metadata — title, description, tags, chapters, hashtags. Title length analyzer (60-70 optimal), keyword placement checker, clickbait score, above-the-fold extractor, keyword density, link detector, chapter parser + validator, tag analyzer, hashtag generator, thumbnail text suggestion, scoring (0-100), CSV export, history (localStorage), shareable URL. 100% client-side.

Z Compressor

Compress and decompress Unix .Z files using LZW compression as defined by ncompress / gzip-compatible .Z format. Magic bytes 0x1f 0x9d, configurable max bits (9–16), block mode toggle. Pure JavaScript, 100% local.

ZIP Compressor

Create ZIP archives from multiple files in the browser — pure JavaScript ZIP writer (STORE method, no compression). Add files via drag-drop, reorder, rename archive, view per-file sizes + compression ratio, download .zip. 100% client-side.

ZIP Extractor

Extract files from .zip archives in the browser — pure JavaScript ZIP reader. Supports STORE (no compression) and DEFLATE entries via DecompressionStream. File tree, search, filter by extension, preview text files, download individual files or all as ZIP. 100% client-side.