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 ...
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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.
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.