Regex Tester
Test and debug regular expressions online with live match highlighting. See match counts and positions instantly — free, no console needed.
Tip: press [ / ] to jump between matches
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Frequently asked questions
What is Regex Tester?+
Test and debug regular expressions in real time — no console needed.
How do I use Regex Tester?+
See all matches highlighted as you type the pattern. Jump Prev/Next between matches in long test strings ([ / ] keys). Toggle flags: global (g), case insensitive (i), multiline (m). Capture groups listed when your pattern uses them
Is Regex Tester free?+
Yes, Regex Tester is completely free. No account or sign-up required, and all processing happens in your browser — nothing is sent to a server.
Is my data safe when I use Regex Tester?+
Yes. Regex Tester runs entirely in your browser using JavaScript and Web APIs — your input is never uploaded, transmitted, or stored on any server.