Test and debug regular expressions online free. See every match instantly with flags and syntax errors - runs in your browser.
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Four simple steps, under ten seconds.
Everything you need to know.
Test, debug and learn regular expressions live. It is part of the Streams8K free AI toolbox — no sign-up, no watermark, unlimited use.
Yes. Regex Tester is 100% free with unlimited uses: no account, no credit card, no hidden limits and no watermark on your downloads.
No. Regex Tester runs right in your browser — just open this page and start. It works on any modern browser (Chrome, Edge, Firefox, Safari) on desktop or mobile.
Yes. Your text is processed instantly and is never stored on our servers.
Yes — output is clean and copy-ready, and everything runs in your browser.
Follow the four steps above — most jobs take under ten seconds from start to download.
g (global), i (ignore case), m (multiline) - combine them as gi, gm or gim from the dropdown.
Yes - free, unlimited and runs instantly in your browser with no sign-up.