Regex Tester

Test a regular expression with live matches and groups

//gm

Test string

Matches (0)

Replace

Syntax cheat sheet

[abc]Any one character listed

[^abc]Any character not listed

.Any character except a newline

\d \w \sDigit, word character, whitespace; uppercase negates

^ $Start / end of text (with m: of each line)

\b \BWord boundary / not a boundary

* + ?0+, 1+, optional; add ? for lazy

{n} {n,m}Exactly n / between n and m

(...)Capturing group; $1 in the replacement

(?:...)Group without capturing

(?<name>...)Named group; $<name> in the replacement

a|bEither side

\1Same text as group n

(?=...) (?!...)Followed by / not followed by

(?<=...) (?<!...)Preceded by / not preceded by

\.Literal character that is otherwise special