Regex Tester

A Regex Tester lets you write regular expression patterns and test them against sample text in real-time, showing all matches and capture groups.

Enter your regex pattern, set flags (g, i, m), type your test string, and see matches highlighted in real-time.

Yes, completely free with no registration.

All regex processing happens in your browser. No data is sent anywhere.

The tool uses JavaScript's built-in RegExp engine, which supports most common regex features including lookahead, lookbehind, and named groups.