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Regex Tester
Test regular expressions live
Everything runs locally in your browser. Your data never leaves your device.
About this tool
Write a JavaScript-style regular expression and test it against any string. Matches are highlighted live and capture groups are listed, with full control over flags like global, case-insensitive and multiline.
Frequently asked questions
Which regex flavor is used?
The browser's native JavaScript regular expression engine, so behaviour matches what you get in JS code.