Regex Tester

Test regular expressions live — see highlighted matches and capture groups with flags support.

How to use

Enter your pattern, pick flags (g, i, m, s, u), and type test text. Matches are highlighted live and capture groups are listed below.

Is this regex tester free?

Yes, free forever, no signup.

Which regex flavor is used?

JavaScript (the same engine your browser uses).

Is my test data uploaded?

No, everything runs locally in your browser.

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