Regex Tester
Test regular expressions live with match highlighting, flags, and match groups. Private and free.
100% client-side — your data never leaves this device.
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Flags
Highlighted matches
2 matchesContact us at hello@example.com or support@test.org for help.
Match details
- hello@example.comindex 14
- support@test.orgindex 35
How to use the regex tester
Enter a JavaScript-compatible regular expression, toggle flags (g, i, m, s, u, y), and paste sample text. Matches highlight instantly with group details. Everything runs in your browser.