Regex Tester

Load a sample

Common tokens

.

Any character except line breaks (all with s)

\d

Digit 0–9

\w

Letter, digit, or underscore

\s

Whitespace

[abc]

One of a, b, or c

[^abc]

Anything except a, b, or c

^ $

Start / end of input (of each line with m)

\b

Word boundary

* + ?

0 or more, 1 or more, optional

{2,4}

Between 2 and 4 times

*? +?

As few as possible

(…)

Numbered capture group

(?<name>…)

Named capture group

(?:…)

Group without capturing

a|b

a or b

(?=…) (?!…)

Followed by / not followed by

(?<=…) (?<!…)

Preceded by / not preceded by

\p{…}

Unicode property, such as Script=Han (u or v)

Replacement tokens

$1

Numbered group

$<name>

Named group

$&

Whole match

$`

Text before the match

$'

Text after the match

$$

A literal $