Text Case Converter
Change the case of any text: upper, lower, title, sentence, or developer formats like camelCase, snake_case and kebab-case.
- Runs in your browser
- Free to use
About this tool
The Text Case Converter handles both prose and code. For prose it offers upper, lower, title, sentence and capitalized case; for identifiers it converts between camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE, detecting existing word boundaries. Inverted and alternating case are included for fun.
Pair with Remove Extra Spaces for tidy output.
How to use it — quick steps
- 01
Enter the text
Type or paste the text in the field above, for example the quick brown fox. Nothing is uploaded.
- 02
Adjust the options
Pick the settings that fit your case; the defaults work for most people. Changes apply instantly.
- 03
Press "Convert case"
Press "Convert case" or Ctrl + Enter. The result appears below in an instant. Results can be copied.
Key features of this tool
Nothing leaves your browser
The processing is plain JavaScript that runs on your device: the text you paste is never uploaded to our servers or to anyone else.
Instant results
Results appear the moment you press the button, even for long inputs, and every block has copy and download actions.
Works everywhere
No installation, no account and no limits: the tool works on desktop and mobile, in any modern browser, as often as you like.
Frequently asked questions
What is the difference between Title Case and Capitalized?
Title Case lowercases everything first and then capitalises each word; Capitalized only uppercases the first letter of each word and leaves the rest as typed.
How are camelCase and snake_case computed?
The text is split on spaces, punctuation and existing case boundaries, then re-joined, so "userFirstName" becomes user_first_name.
Are my files or data uploaded?
No. The tool is plain JavaScript that runs in your browser; the files or data you provide here are never uploaded to our servers.