About Random Case
Random Case is a free, fast and reliable online tool. Randomly uppercase or lowercase each letter. Try it with "Hello world". Everything runs locally in your browser — no files are uploaded and no data is stored, keeping your information completely private. It works responsively on both desktop and mobile devices.
How to use Random Case
- 1 Paste or type your content in the input box
- 2 Try the sample "Hello world" to see how it works
- 3 Click "Convert"
- 4 Click "Copy" to copy the output
Frequently asked questions
What can I do with Random Case?
Randomly uppercase or lowercase each letter. Try it with "Hello world".
Is Random Case free to use?
Yes — Random Case is a free online tool. No sign-up or login is required, and there are no hidden charges or usage limits.
Do I need to create an account to use Random Case?
No. Random Case runs entirely online in your browser — there is no account to create, no login, and nothing to install.
Does Random Case upload my data?
No. Everything runs locally in your browser. Your input never leaves your device, is never stored, and is never tracked, so it stays private.
Free, online, and private
Free to use
Random Case is completely free. There is no account to create, no login, and no hidden charge or usage limit.
Runs online in your browser
It is a free online tool that runs entirely in your browser. Nothing to download or install — open the page and start using it right away.
Your data stays private
All processing happens locally on your device. Your input is never uploaded, stored, or tracked, so it never leaves your browser.