Regex Tester

Regular Expression

/ /

Matches: 0

Test Strings

Capture Groups

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Cheat Sheet

Character Classes

.Any character

\wWord character

\dDigit

\sWhitespace

\WNon-word

\DNon-digit

\SNon-whitespace

[abc]Character set

[^abc]Negated set

[a-z]Range

Anchors

^Start of string

$End of string

\bWord boundary

\BNon-boundary

Quantifiers

*0 or more

+1 or more

?0 or 1

{n}Exactly n

{n,m}Between n and m

*?Lazy (0+)

+?Lazy (1+)

Groups & Lookaround

(abc)Capture group

(?<name>)Named group

(?:abc)Non-capturing

a|bAlternation

(?=abc)Lookahead

(?!abc)Neg. lookahead

(?<=abc)Lookbehind

(?<!abc)Neg. lookbehind

\1Back-reference

Common Patterns

EmailBasic email

URLHTTP(S) URL

IPv4IP address

Hex Color#RGB or #RRGGBB

DateYYYY-MM-DD