Free Online Tool
Constant Case Converter
Convert text into CONSTANT_CASE, uppercase words joined by underscores.
The Constant Case Converter lets you convert text into CONSTANT_CASE, uppercase words joined by underscores. Paste your text below and the converted result appears immediately — no waiting, no upload, and nothing saved anywhere.
How to use the Constant Case Converter
- Paste your original text into the input box.
- Choose any conversion options offered above.
- Copy the converted result, or download it as a .txt file.
- Use Clear to start over with new text.
Key features
- Converts instantly as you type, with no delay.
- 100% private — your text stays in your browser.
- Free to use, with no sign-up and no daily limit.
- Handles both short snippets and long documents well.
Questions
Frequently asked questions
Is the Constant Case Converter free to use?
Yes — the Constant Case Converter is completely free, with no sign-up, no trial period, and no hidden limits.
Is my text uploaded anywhere when I use the Constant Case Converter?
No. The Constant Case Converter runs entirely in your browser using JavaScript. Your text is processed on your own device and is never sent to a server.
Can I use the Constant Case Converter on my phone?
Yes. The Constant Case Converter works in any modern browser, including on mobile devices, with no app to install.
Is there a limit to how much text I can use?
There's no artificial limit. Because everything runs in your browser rather than on a server, the Constant Case Converter can generally handle as much text as your device can comfortably process.
Keep going
Related tools
Camel Case Converter
Convert text or snake_case/kebab-case into camelCase.
Pascal Case Converter
Convert text into PascalCase, with each word capitalized and no spaces.
Snake Case Converter
Convert text into snake_case, lowercase words joined by underscores.
Kebab Case Converter
Convert text into kebab-case, lowercase words joined by hyphens.
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