About the Regex Tester
Write a pattern, choose flags and see every match highlighted in your test text, with capture groups and a replacement preview.
Regex Tester
Test JavaScript regular expressions with live match highlighting, capture groups and replace preview.
- Paste your input
- Choose the options
- Copy the output
Runs in your browser. Your data and files never leave your device.
Frequently asked questions
Which regex flavour is this?
JavaScript (ECMAScript), as used in browsers and Node.js. Most syntax is shared with other languages.
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