Text & language
Case Converter
UPPERCASE, lowercase, camelCase, snake_case, kebab-case — the right case in one click.
A variable name to harmonise, a list of SQL columns to move to snake_case, a title received in all caps that needs taming, a URL slug to build: case conversions punctuate the day of anyone who works with text or code. Paste your text and pick the transformation: uppercase, lowercase, Title Case, sentence case, camelCase, PascalCase, snake_case or kebab-case. Conversion is instant, handles accented characters sensibly and copies in one click. Eight conventions, no macro to write, no page reload. Everything runs in your browser: free, no sign-up, and your text is never transmitted anywhere — safe for internal names and identifiers.
How does it work?
- Paste your text into the input area.
- Click the convention you need: uppercase, camelCase, snake_case…
- The converted text appears immediately.
- Copy it with one click.
Frequently asked questions
camelCase, PascalCase, snake_case — who uses what?
By convention, camelCase is for variables and functions in JavaScript and Java; PascalCase for classes and components (React, C#); snake_case for Python variables and SQL columns; SCREAMING_SNAKE_CASE for constants. What matters most is not which convention you pick, but sticking to it across the whole project.
Why kebab-case for URLs and CSS files?
Because the hyphen is the one word separator Google treats as a space in URLs — “case-converter-online” reads as three words, “case_converter_online” as one. And in CSS and HTML, which are case-insensitive in places, the hyphen removes any ambiguity.
What happens to accented characters?
Upper/lowercase conversions preserve them (“é” becomes “É”). For code cases — camelCase, snake_case, kebab-case — the usual practice is to transliterate them (“é” becomes “e”) so identifiers and slugs end up in pure ASCII, compatible everywhere.
Does Title Case capitalise every single word?
In edited English, not quite: style guides leave small words (articles, short prepositions) in lowercase. This tool applies straightforward word-by-word capitalisation — fast and predictable — so adjust afterwards to match your style guide if you follow one strictly.