Regex Tester

You can toggle the global (g), case-insensitive (i), and multiline (m) flags using checkboxes. All standard JavaScript regex features are supported.

Matched portions of the test string are highlighted with a colored background. Each match is shown with its index, value, and any captured groups.

Built-in presets include patterns for Email, URL, Phone Number, and IP Address. Click a preset to load it instantly.

Yes. All processing happens in your browser. No data is sent to any server.