Text Case & Format Converter
Convert text to UPPER, lower, Title Case, camelCase, snake_case or kebab-case. All processing happens in your browser; your input is never sent to the server.
Renaming a variable, fixing a heading, normalising a column of data — all of it comes down to changing how a string is cased. This converter handles the human cases (upper, lower, title, sentence) and the programming cases (camelCase, PascalCase, snake_case, kebab-case, CONST_CASE) from one input.
How to use it
- Paste the text you want to convert. Multiple lines are fine.
- Pick a target case. The tool splits the input on spaces, underscores, hyphens and existing camel boundaries, so it converts between programming cases correctly.
- Read the result in the output box and copy it.
- To chain conversions, copy the output back into the input.
Frequently asked questions
- Does it handle Turkish i correctly?
- Yes, and this matters more than it sounds. In Turkish, uppercase i is İ and lowercase I is ı. A plain toUpperCase turns "istanbul" into "ISTANBUL" instead of "İSTANBUL". This tool uses locale-aware conversion.
- What is the difference between title case and sentence case?
- Title case capitalises every word. Sentence case capitalises only the first letter of each sentence and leaves the rest lowercase.
- Can it convert snake_case straight to camelCase?
- Yes. Underscores, hyphens, dots and spaces are all treated as word boundaries, so any programming case converts into any other.
- Is my text sent to the server?
- No. Everything runs in your browser on this page.