Regex Tester
Test regular expressions live with match highlighting and capture groups.
100% Private — Nothing is Uploaded
All processing happens locally in your browser. Your files never leave your device and are never sent to any server.
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Matches:
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Capture groups:
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Matched chars:
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About the Regex Tester
This tool tests regular expressions against any text you paste. Matches are highlighted in real time and each capture group is listed individually.
Features
- Live matching — results update as you type.
- All flags —
g,i,m,s,u,y. - Capture groups — numbered and named groups are listed for every match.
- Position tracking — see the exact character index of each match.
- 100% client-side — nothing is uploaded.