Regex tester

Live regular expression evaluation with match highlighting

0 matches

Test String

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Matches

No matches

Select a match on the left to inspect capture groups

Regex Cheatsheet

Anchors

^Start of string / line (m)

$End of string / line (m)

\bWord boundary

\BNon-word boundary

Character Classes

.Any except newline (or all with s)

\dDigit [0-9]

\DNon-digit

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

\WNon-word character

\sWhitespace

\SNon-whitespace

Sets

[abc]Any of a, b, c

[^abc]Not a, b, c

[a-z]Character range

[a-zA-Z]Union of ranges

Quantifiers

*0 or more (greedy)

+1 or more (greedy)

?0 or 1

{n}Exactly n

{n,}n or more

{n,m}Between n and m

*? +? ??Lazy (non-greedy)

Groups

(...)Capture group

(?:...)Non-capturing group

(?<n>...)Named capture group

(?=...)Positive lookahead

(?!...)Negative lookahead

(?<=...)Positive lookbehind

(?<!...)Negative lookbehind

Escapes

\nNewline

\tTab

\rCarriage return

\\Literal backslash

\. \* \+ \?  \[ \{Escaped specials

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