Test regular expressions as you type
Write a pattern, paste some test text and see the matches highlighted live, with the details of each match and its groups. It uses the JavaScript regex engine and runs entirely in your browser.
Frequently asked questions
Which regex flavour is this?
JavaScript. Most patterns behave the same across engines, but a few features differ from PCRE and .NET, so test in your target language too.
Is my text uploaded?
No. Matching runs entirely in your browser.