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Regex Tester & Debugger (Free Online)
Test regular expressions with live match highlighting. Supports flags, capture groups, and detailed match information.
developerFree · No signup · 100% browser-based
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Google AdSense · leaderboard
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Frequently Asked Questions
What regex flavor does this support?+−
This tester uses JavaScript (ECMAScript) regular expression syntax, which supports flags: g, i, m, s, u, y.
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About Regex Tester
Test regular expressions with live match highlighting. Supports flags, capture groups, and detailed match information.
This tool works entirely in your browser — no server uploads, no account required. Your data stays on your device at all times.
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