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Regex Generator

DEVFREE · NO SIGNUP

Build and test regular expressions

Regex Tester lets you build and test regular expressions against sample text, with live match highlighting. It runs in your browser, so your test data stays private.

How to use Regex Generator

  1. 01Enter your regular expression.
  2. 02Paste the text to test against.
  3. 03See the matches highlighted in real time.

Frequently asked questions

Does it show matches live?
Yes. Matches update as you edit the pattern or the text.
Is my test data uploaded?
No. Everything runs locally in your browser.
Can I use flags like global or case-insensitive?
Yes. Toggle common flags to control how the pattern matches.
Is it free?
Yes, free with no sign-up.
● client-side● no upload● privacy-safe
dev › regex