Convert text to upper, lower, title or programmer case (camelCase, PascalCase, snake_case, kebab) - locally in your browser, no upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Changing case sounds simple, yet in daily work it is surprisingly often needed: a heading in capitals, a variable name in camelCase, a class name in PascalCase, a file or URL fragment in kebab-case, a constant in CONSTANT_CASE. This tool does all of that in one step. You paste your text, pick the target case and get the result instantly - no tedious typing or search-and-replace.
For the simple cases (UPPER, lower, Title, Sentence) your text keeps all its punctuation; only the capitalization changes. For the programmer cases (camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE) the tool splits the text into words - recognizing spaces, hyphens, underscores and the boundaries inside camelCase - and reassembles them by the chosen convention. camelCase starts lowercase, PascalCase starts uppercase - otherwise the two are identical. Umlauts and accents are handled correctly.
The whole conversion runs entirely locally in your browser in pure JavaScript - your text is not uploaded, not stored, and no foreign library is loaded from a CDN. You can download the result as a text file or copy it onward directly.
| Input formats | Text input |
|---|---|
| Output format | TXT |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Title and sentence case follow simple, language-neutral rules (first character of each word or sentence capitalized) and know no language-specific exceptions such as lowercased articles. The programmer cases discard punctuation, because an identifier may not contain any. Very large texts are limited by your device memory.
| Case | Example |
|---|---|
| UPPERCASE | HELLO WORLD |
| lowercase | hello world |
| Title Case | Hello World |
| Sentence case | Hello world |
| camelCase | helloWorld |
| PascalCase | HelloWorld |
| snake_case | hello_world |
| kebab-case | hello-world |
| CONSTANT_CASE | HELLO_WORLD |
| dot.case | hello.world |
| path/case | hello/world |
No. The conversion runs entirely locally in your browser; your text never leaves your device and is not stored.
They are conventions for identifiers in programming: camelCase joins words without separators and capitalizes each following word (helloWorld); snake_case links them with underscores (hello_world). kebab-case uses hyphens, often in URLs.
Both string words together without separators and capitalize each following word. The only difference is the first character: camelCase starts lowercase (helloWorld), PascalCase starts uppercase (HelloWorld) - typical for class names in many programming languages.
Yes. The case conversion is Unicode-aware, so ä becomes Ä and accents are preserved correctly.
Programmer cases produce a single identifier that may not contain spaces or punctuation. These only serve as separators between words and are therefore removed.
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