UnQTools

100 tools

File Management, Archiving & Compression

100 tools in this category — all running 100% in your browser. No uploads, no tracking, no accounts.

100% Private Works Offline Instant

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.

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.

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.

Azw3 To Pdf Converter

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

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.

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.

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.

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.

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.

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 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.

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.

Djvu To Pdf Converter

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

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.

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.

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.

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 Converter

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

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.

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.

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 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 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.

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.

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.

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.

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 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.

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.

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.

Line Ending Converter

Convert line endings between CRLF (Windows), LF (Unix), CR (Classic Mac). Detect source, normalize, batch files, and 10+ extras. 100% private.

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.

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.

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.

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.

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.

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.

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.

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 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 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 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 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 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 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 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 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 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 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 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 Xps Converter

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

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.

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.

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.

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.

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.

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 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.

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.

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.

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 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.

Xps To Pdf Converter

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

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.