(Documentation in English)
What it does
Converts one text into ten casing conventions at once: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, slug, Title Case, Sentence case, UPPER, and lower. Pick a chip, and the text re-renders in that case. Short single-line results render in large type; long or multiline results render in the output box. The share link carries both the case and the text, so you can send an exact setup.
How to use it
- Type or paste text into the input.
- Tap one of the ten case chips along the top.
- Read the converted result. Short results render large; long or multiline results render in the box.
- Copy the result, or copy the share link to reopen the tool with your case and text.
Examples
Input hello world in every case the tool offers:
| Case | Result |
|---|---|
| camelCase | helloWorld |
| PascalCase | HelloWorld |
| snake_case | hello_world |
| kebab-case | hello-world |
| CONSTANT_CASE | HELLO_WORLD |
| slug | hello-world |
| Title Case | Hello World |
| Sentence case | Hello world |
| UPPER | HELLO WORLD |
| lower | hello world |
Slug and kebab-case produce the same string here. The difference is intent: a slug is a URL segment, kebab-case is an identifier convention.
How text cases work
Each convention is one rule for joining words, plus one for capitalizing them:
| Convention | Join | Capitalize | Where it lives |
|---|---|---|---|
| camelCase | nothing | first word lower, rest capped | JavaScript and TypeScript variables, functions |
| PascalCase | nothing | every word capped | classes, React components, TypeScript types |
| snake_case | underscore | all lower | Python identifiers, SQL column and table names |
| kebab-case | hyphen | all lower | CSS classes, custom HTML attributes, package names |
| CONSTANT_CASE | underscore | all upper | environment variables, enum values, config keys |
| slug | hyphen | all lower | URL path segments - what Slugify produces |
The other four (Title, Sentence, UPPER, lower) format prose rather than identifiers: headings, first lines, shouting, normalizing.
How the tool finds the words. It splits input on whitespace, underscores, hyphens, and dots, and it breaks camelCase at lower-to-upper boundaries (helloWorld becomes hello + World). Symbols drop out, so hello, world! and Hello World both convert to the same helloWorld. Paste any mixed input and the ten outputs come from the same word list - only the join and capitalize rules differ.
Why teams pin one case per surface. A codebase that writes user-id, userId, and user_id in three layers makes every boundary a translation bug. The table above is the de-facto map: pick a case per surface once, and conversion becomes mechanical.
Good to know
- Word-splitting is lossy. Punctuation is dropped, not preserved:
hello, world!yieldshelloWorld, with no comma. - Numbers count as letters.
version 2converts toversion2/VERSION_2like any word. - Private: all conversion runs locally in your browser. Nothing is sent anywhere.
- Related tools: Slugify, Word Counter.