Regex Tester

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Pattern / /

Test String

0 matches

Highlighted Matches

Matches will appear here as you type.

Capture Groups

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Explanation

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Type a JavaScript regular expression and test string to see every match highlighted live, with capture groups and a token-by-token explanation of the pattern. It uses your browser's own RegExp engine, so behaviour matches what your JS code will do. The text you paste stays in this tab.