Test patterns before you ship them
Regular expressions describe text patterns and are used for validation, search and replace. A live tester shows exactly what matches, so you can fix a pattern in seconds.
This tester uses the JavaScript regular expression engine in your browser. Matches are highlighted and every capture group is listed.
How to use the Regex Tester
- 1Enter your regular expression.
- 2Toggle flags and paste a test string.
- 3Review highlighted matches and groups.
Frequently asked questions
Which regex flavor is used?
JavaScript (ECMAScript), as in your browser.
Is my text uploaded?
No. Matching runs locally.