Regex Tester
Test and debug regular expressions online. Enter a regex pattern, flags, and test text to see matches and groups instantly.
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About Regex Tester
This tool helps you test and debug regular expressions in real time. See matches, groups, and experiment with different patterns and flags. All processing is local and private.
FAQs
Is this regex tester free?
Yes — you can test unlimited patterns for free.
Is my data uploaded?
No. All processing happens locally in your browser — your patterns and text are never sent or saved.
What regex engine is used?
This tool uses JavaScript’s built-in regex engine (ECMAScript/ES6). Some advanced features from other engines may not be supported.