Regex Tester
betaTest a pattern against your own text with live highlighting, capture groups, named groups and a plain-English explanation of what the expression does. Matching runs in a worker that is terminated if a pattern backtracks catastrophically, so a runaway regex cannot lock the page.
Runs in your browser · nothing uploaded·Free, no signup
FAQ
Is Regex Tester free?
Yes. Regex Tester is completely free and runs entirely in your browser. No account required.
Does Regex Tester send my data anywhere?
No. All processing happens locally in your browser. Nothing is uploaded to a server.
