Does this work with non-English text?

Yes. Accented Latin, Telugu, Hindi, Arabic, Cyrillic, Greek, Chinese, Japanese, Korean, Hebrew and Thai are all handled. Words are split on Unicode letter boundaries, so nothing is deleted.

Why did other tools mangle my accented text?

Most case converters split words with [^a-zA-Z0-9]. That treats é, ñ and త as separators and silently deletes them. This tool does not use that pattern.

Can I keep acronyms like NASA and API uppercase?

Yes, and it is on by default. Add your own to the acronym list in the advanced settings.

What does the Turkish or German locale change?

Turkish uppercases i to İ rather than I, and German uppercases ß to SS. Set the locale so the result is correct for your language.

Can I convert only some lines?

Turn on per-line mode and each line is converted independently. Select text in the box and use Convert selection to change only that part.

Will it break my {{placeholders}}?

No. Protecting {{braces}} and ${templates} is on by default. You can also protect quoted text or any pattern you supply.

Is my text uploaded anywhere?

No. Everything runs in your browser. There is no network request in this tool at all, and it works with the internet switched off.

Is the conversion reversible?

Usually not, and the tool warns you when it is not. Once a sentence becomes snake_case, the original spacing and capitalisation are gone. Keep your original, or use undo.

Is there a size limit?

Five million characters. Above 250 KB the work is chunked so the page stays responsive, with progress and a Stop button.

Text Runs in your browser

Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more. 100% private.

100% Private Works Offline Instant

Text Case Converter

Thirty case styles that keep accents, Telugu, Hindi, emoji and acronyms intact. Everything runs in your browser.

Your text

Characters:: 0
Words:: 0
Lines:: 0
Size:: 0.0 KB

Presets

Settings

Style

Press Ctrl+K to search all 30 styles.

Language rules

Turkish uppercases i to İ. German uppercases ß to SS.

Convert each line separately

Use this for lists, column names and code names.

Keep acronyms uppercase

NASA API guide becomes NASA API Guide, not Nasa Api Guide.

Protect {{placeholders}}

Leaves {{name}} and ${value} exactly as they are.

Protect quoted text

Leaves quoted and backticked text untouched.

Trim trailing spaces

Collapse repeated spaces

Include my text in shared links

Only if it is under 1,500 characters. Off by default.

Advanced

Acronyms to keep uppercase

Separate with spaces or commas.

Small words kept lowercase in Title Case

Protect anything matching this pattern

Numbers

Result — UPPERCASE

Add some text above and the result appears here.

Download

Settings used for this result

Tool: Text Case Converter
Style: UPPERCASE
Generated: 2026-08-03T07:25:17.380Z
Non-default settings: none

Every style at once

Your text never leaves this device

There is no upload, no account and no analytics. The tool works with the internet switched off. Stored in this browser only: your settings, your saved presets, your last 20 results and one autosaved draft.

How to change text case

Add your text. Type it, paste it, drop a file in, or load a sample.
Pick a style. Choose one of 30 styles, or press Ctrl+K to search them.
Adjust the settings. Turn on per-line mode for lists, or protect placeholders and quoted text.
Take the result. Copy it, or download TXT, Markdown, JSON, CSV or HTML.

Questions

Does this work with non-English text?: Yes. Accented Latin, Telugu, Hindi, Arabic, Cyrillic, Greek, Chinese, Japanese, Korean, Hebrew and Thai are all handled. Words are split on Unicode letter boundaries, so nothing is deleted.
Why did other tools mangle my accented text?: Most case converters split words with [^a-zA-Z0-9]. That treats é, ñ and త as separators and silently deletes them. This tool does not use that pattern.
Can I keep acronyms like NASA and API uppercase?: Yes, and it is on by default. Add your own to the acronym list in the advanced settings.
What does the Turkish or German locale change?: Turkish uppercases i to İ rather than I, and German uppercases ß to SS. Set the locale so the result is correct for your language.
Can I convert only some lines?: Turn on per-line mode and each line is converted independently. Select text in the box and use Convert selection to change only that part.
Will it break my {{placeholders}}?: No. Protecting {{braces}} and ${templates} is on by default. You can also protect quoted text or any pattern you supply.
Is my text uploaded anywhere?: No. Everything runs in your browser. There is no network request in this tool at all, and it works with the internet switched off.
Is the conversion reversible?: Usually not, and the tool warns you when it is not. Once a sentence becomes snake_case, the original spacing and capitalisation are gone. Keep your original, or use undo.
Is there a size limit?: Five million characters. Above 250 KB the work is chunked so the page stays responsive, with progress and a Stop button.

Related tools

Text Trimmer — Clean whitespace before converting.
Find and Replace — Change words, not just their case.
Text Statistics — Full counts and readability.
Remove Duplicate Lines — Tidy a list first.

Also known as: uppercase converter, lowercase converter, title case generator, camelcase converter, snake case converter, kebab case, capitalize each word, sentence case fixer, change text case online, caps lock fixer, slug generator, env variable name generator.

About Text Case Converter

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more. 100% private. Everything runs locally in your browser — your data never leaves your device.

How to use

Enter your input in the tool above.
Adjust any options to your preference.
Use the Copy or Download buttons to save the result.
Everything happens locally — your data never leaves your browser.

FAQ

What cases are supported?

UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, and alternating case — 11 in total.

How does Title Case handle small words?

Articles, conjunctions, and short prepositions (a, an, the, and, but, or, for, nor, in, on, at, to, by, of, etc.) are kept lowercase unless they're the first or last word of the string, following standard title-case rules.

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All tools

Your text

Characters:: 0
Words:: 0
Lines:: 0
Size:: 0.0 KB

Presets

Settings

Style

Press Ctrl+K to search all 30 styles.

Language rules

Turkish uppercases i to İ. German uppercases ß to SS.

Convert each line separately

Use this for lists, column names and code names.

Keep acronyms uppercase

NASA API guide becomes NASA API Guide, not Nasa Api Guide.

Protect {{placeholders}}

Leaves {{name}} and ${value} exactly as they are.

Protect quoted text

Leaves quoted and backticked text untouched.

Trim trailing spaces

Collapse repeated spaces

Include my text in shared links

Only if it is under 1,500 characters. Off by default.

Advanced

Acronyms to keep uppercase

Separate with spaces or commas.

Small words kept lowercase in Title Case

Protect anything matching this pattern

Numbers

Result — UPPERCASE

Add some text above and the result appears here.

Download

Settings used for this result

Tool: Text Case Converter
Style: UPPERCASE
Generated: 2026-08-03T07:25:17.380Z
Non-default settings: none

Every style at once

Your text never leaves this device

How to change text case

Add your text. Type it, paste it, drop a file in, or load a sample.
Pick a style. Choose one of 30 styles, or press Ctrl+K to search them.
Adjust the settings. Turn on per-line mode for lists, or protect placeholders and quoted text.
Take the result. Copy it, or download TXT, Markdown, JSON, CSV or HTML.

Questions

Does this work with non-English text?: Yes. Accented Latin, Telugu, Hindi, Arabic, Cyrillic, Greek, Chinese, Japanese, Korean, Hebrew and Thai are all handled. Words are split on Unicode letter boundaries, so nothing is deleted.
Why did other tools mangle my accented text?: Most case converters split words with [^a-zA-Z0-9]. That treats é, ñ and త as separators and silently deletes them. This tool does not use that pattern.
Can I keep acronyms like NASA and API uppercase?: Yes, and it is on by default. Add your own to the acronym list in the advanced settings.
What does the Turkish or German locale change?: Turkish uppercases i to İ rather than I, and German uppercases ß to SS. Set the locale so the result is correct for your language.
Can I convert only some lines?: Turn on per-line mode and each line is converted independently. Select text in the box and use Convert selection to change only that part.
Will it break my {{placeholders}}?: No. Protecting {{braces}} and ${templates} is on by default. You can also protect quoted text or any pattern you supply.
Is my text uploaded anywhere?: No. Everything runs in your browser. There is no network request in this tool at all, and it works with the internet switched off.
Is the conversion reversible?: Usually not, and the tool warns you when it is not. Once a sentence becomes snake_case, the original spacing and capitalisation are gone. Keep your original, or use undo.
Is there a size limit?: Five million characters. Above 250 KB the work is chunked so the page stays responsive, with progress and a Stop button.

Related tools

Text Trimmer — Clean whitespace before converting.
Find and Replace — Change words, not just their case.
Text Statistics — Full counts and readability.
Remove Duplicate Lines — Tidy a list first.

Text Case Converter

Settings

Result — UPPERCASE

Every style at once

Your text never leaves this device

How to change text case

Questions

Related tools

About Text Case Converter

How to use

FAQ

What cases are supported?

How does Title Case handle small words?

Related tools

Abstract Generator

Acronym Expander

Acronym Generator

Search tools and actions

Settings

Result — UPPERCASE

Every style at once

Your text never leaves this device

How to change text case

Questions

Related tools