Regex Tester
Run a regex against text and see it match
Type a pattern and toggle flags (g·i·m·s·u·y), and matches highlight live in your test string. Each match shows its position and capture groups (numbered and named), and an invalid pattern is reported with its error message. It uses the browser's built-in RegExp engine, so nothing is sent anywhere, it all runs in your browser, no login or backend.
Flags
Matches
Enter a pattern and test string above.
Tip: runs entirely in your browser with the native RegExp engine, nothing is sent anywhere. Matches highlight live; capture groups (numbered and named) are listed per match.
