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Tool #5 · Pattern Matching

Regex Tester & Visualizer

Debug and test regular expressions in real time. Instant match highlighting, capture group parsing, and an engineering cheatsheet. 100% private in-browser tool.

REGULAR EXPRESSION & FLAGS
/ /
TEST STRING
MATCH HIGHLIGHTING Matches: 0

Quick Regex Cheatsheet

Character Classes

. Any character except newline
\w Word [a-zA-Z0-9_]
\d Digit [0-9]
\s Whitespace

Quantifiers

* 0 or more
+ 1 or more
? 0 or 1 (optional)
{n,m} Between n and m

Anchors & Groups

^ / $ Start / End of string
(...) Capture group
(?:...) Non-capturing group
[abc] Match any a, b, or c
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