Text tool

Change the case of anything.

Ten conversions including the programming cases, with proper title-case rules that leave the small words alone.

  • Free, no sign-up
  • Nothing is uploaded
  • No watermark, no limits

Case converter

Free
Convert to
Runs entirely in your browser. Nothing is uploaded.

Worth knowing

How to get this right.

  1. 01

    Title case has rules, and most converters ignore them

    Proper title case capitalises the first and last word and everything in between except articles, short conjunctions and short prepositions — a, an, the, and, but, or, for, at, by, in, of, on, to. "The Quick Brown Fox Jumps over the Lazy Dog" is correct; capitalising "over" and "the" is not. This tool follows that rule.

  2. 02

    Which programming case goes where

    camelCase for JavaScript variables and functions. PascalCase for classes and React components. snake_case for Python and most SQL. kebab-case for CSS classes, HTML attributes and URLs. CONSTANT_CASE for environment variables and true constants. Following the convention of the language you are in matters far more than which one you prefer.

  3. 03

    Converting is not the same as writing

    Converting a sentence to uppercase gives you shouting; writing a headline in sentence case gives you something people read. Case conversion is a mechanical step — the decision about what tone you want is a separate one.

Questions

About this tool.

Yes for the upper and lower conversions, which use the browser's Unicode-aware casing. The programming cases strip accents, because identifiers with accents cause more problems than they solve.
Because the programming cases produce identifiers, and identifiers cannot contain punctuation. Everything that is not a letter or digit becomes a word boundary.
Yes. The converter splits on case changes first, so myVariableName becomes my_variable_name rather than myvariablename.
No. Everything runs locally, so the only limit is how much text your browser is happy holding in a textarea.

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