Regex Tester

Test regular expressions with real-time match highlighting. 100% client-side — your data stays in your browser.

/ /

Test String 0 matches

Highlighted Matches

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Match Details

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Cheat Sheet

Character Classes

.Any character

\dDigit [0-9]

\DNon-digit

\wWord char [a-zA-Z0-9_]

\WNon-word char

\sWhitespace

\SNon-whitespace

Anchors

^Start of string

$End of string

\bWord boundary

Quantifiers

*0 or more

+1 or more

?0 or 1

{n}Exactly n

{n,m}Between n and m

Groups & Lookaround

(abc)Capture group

(?:abc)Non-capture group

(?=abc)Positive lookahead

(?!abc)Negative lookahead

(?<=abc)Positive lookbehind

Common Patterns

URLhttp(s)://...

IPv4192.168.1.1

Hex Color#ff00aa