What does Regex Tester do?
Test regular expressions with live match highlighting and capture groups.
Calculations happen instantly in your browser. Nothing you enter is stored or sent anywhere.
How to use Regex Tester
- 1Enter or paste your input into the Regex Tester.
- 2Adjust the options — results update instantly.
- 3Copy the result to your clipboard or download it.
Frequently asked questions
Is Regex Tester free?
Yes. Regex Tester is completely free with no sign-up and no watermarks.
Is my data stored?
Calculations happen instantly in your browser. Nothing you enter is stored or sent anywhere.