Which regex flavor is supported?

JavaScript (ECMAScript) regular expressions, including support for flags like g, i, m, s, and u.

Can I see capture group values?

Yes. All capture groups and named groups are listed with their matched values for each match.

Does it explain what my regex does?

The tool highlights matches visually. Use it iteratively to refine your pattern against your test string.

Regex Tester

Test regular expressions and find all matches with positions in your text.

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About Regex Tester

Test regular expressions and find all matches with positions in your text. Powered by JustUse.me — free, ad-free, and private. This tool runs entirely in your browser. Your files are never uploaded to any server.

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