Regex Tester & Debugger
Test, validate, and debug regular expressions with real-time matching
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Unique Matches
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Regular Expression Reference
Anchors
^ - Start of string$ - End of string\b - Word boundary\B - Non-word boundary
Character Classes
\d - Digit [0-9]\w - Word [a-zA-Z0-9_]\s - Whitespace. - Any character (except newline)
Quantifiers
* - 0 or more+ - 1 or more? - 0 or 1{n} - Exactly n times
Groups
(abc) - Capturing group(?:abc) - Non-capturing\1 - Backreference(?=abc) - Lookahead