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Regex Tester

Test and debug regular expressions with live matching and replacement

0 matches

Regex Quick Reference

Character Classes

. - Any character except newline
\d - Digit [0-9]
\w - Word [A-Za-z0-9_]
\s - Whitespace
[abc] - Any of a, b, or c
[^abc] - Not a, b, or c

Quantifiers

* - 0 or more
+ - 1 or more
? - 0 or 1
{3} - Exactly 3
{3,} - 3 or more
{3,5} - 3 to 5

Anchors

^ - Start of string/line
$ - End of string/line
\b - Word boundary
\B - Not word boundary

Groups & Lookaround

(abc) - Capture group
(?:abc) - Non-capturing group
(?=abc) - Positive lookahead
(?!abc) - Negative lookahead