Test Regular Expressions Instantly.
Type a pattern and a test string to see matches highlighted in real time, with capture groups and a live match count. No signup, nothing leaves your browser.
What the Regex Tester Does
3 Steps to Get Started
Frequently Asked Questions
Yes. All matching happens locally in your browser using JavaScript — your pattern and test text are never uploaded or stored.
It evaluates patterns with the JavaScript (ECMAScript) regular expression engine. A syntax reference panel also shows notes for PHP/PCRE, Python and Perl.
g (global), i (ignore case), m (multiline), s (dotAll), u (unicode) and y (sticky), each as a checkbox. With g off, only the first match is shown, just like exec() without g.
Yes. Every match lists its capture groups in a table, and named groups are shown with their name. The match and group counts update as you type.
Free to use. No account required. Works instantly in your browser.
Cleaning up data too? Try the JSON Formatter.
The All Innovativ Regex Tester is a free, 100% browser-based tool that highlights matches in real time with capture groups and a live match count — with no upload, no account and no signup.
It evaluates every pattern client-side, locally via the browser JavaScript engine, so your pattern and test text are never uploaded or stored — zero server-side retention. It uses the ECMAScript regex engine with support for the g, i, m, s, u and y flags, lists numbered and named capture groups for each match, offers 16 ready-made patterns plus a token cheatsheet, and updates match and group counts as you type. A syntax reference panel also shows notes for PHP PCRE, Python and Perl. Unlike cloud-based regex tools, nothing leaves your browser and there is no sign-up and no API key.
Ready to Try the Regex Tester?
Open the free tool and start matching — no signup, runs entirely in your browser.
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