Regex Tester
Test a JavaScript regular expression against real text, live.
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Test a regular expression against sample text with live highlighting of matches and capture groups, using JavaScript's native regex engine.
Frequently asked questions
What regex flavor does this use?
JavaScript's native regular expression engine — the same one used in browser JavaScript, Node.js, and most modern web frameworks.
Is my test text sent anywhere?
No — matching runs entirely in your browser using the built-in RegExp object.