Regex Tester

Character classes

.

Any character except newline

\d

Any digit (0–9)

\D

Any non-digit

\w

Word character (a–z, A–Z, 0–9, _)

\W

Any non-word character

\s

Any whitespace

\S

Any non-whitespace

[abc]

Any one of a, b, or c

[^abc]

Anything except a, b, or c

[a-z]

Any character in the range

Anchors & boundaries

^

Start of string (or line with m)

$

End of string (or line with m)

\b

Word boundary

\B

Not a word boundary

Quantifiers

*

Zero or more

+

One or more

?

Zero or one (optional)

{n}

Exactly n times

{n,}

n or more times

{n,m}

Between n and m times

*?

Lazy — as few as possible

Groups & alternation

(…)

Capturing group

(?:…)

Non-capturing group

(?<name>…)

Named capturing group

\1

Backreference to group 1

|

Alternation — match either side

Lookaround

(?=…)

Lookahead — followed by

(?!…)

Negative lookahead

(?<=…)

Lookbehind — preceded by

(?<!…)

Negative lookbehind

Escapes

\.

A literal dot

\n

Newline

\t

Tab

\uFFFF

Unicode code point