Regular Expression Tester
Validate patterns, test inputs, and inspect capture groups without leaving your browser.
Match Preview
Matches will appear highlighted here.
Matches & Groups
How it works
Immediate feedback: Preview highlighted matches as you edit the pattern.
Capture groups: Inspect groups and named captures for each match.
Flags supported: Toggle global, multiline, unicode, and more.
Local testing: Everything runs locally in the browser for privacy.