Regex Tester Online Free - Test a Regular Expression

Reference

Symbol	What it does
`.`	Any character except a line break (with the s flag, line breaks count too).
`\d`	A digit from 0 to 9.
`\D`	Anything that is not a digit.
`\w`	A letter, digit, or underscore `_` (a “word”).
`\W`	The opposite of `\w`.
`\s`	Whitespace: space, tab, or line break.
`\S`	Anything that is not whitespace.
`\t`	Tab.
`\n`	Line break.
`\b`	Word boundary (between a letter/digit and something else).
`\B`	A position that is not a word boundary.
`^`	Start of the text (with the m flag, the start of each line).
`$`	End of the text (with the m flag, the end of each line).
`?`	The previous item is optional: it appears 0 or 1 time.
`*`	The previous item may repeat 0 or more times.
`+`	The previous item may repeat 1 or more times.
`{n}`	The previous item appears exactly n times.
`{n,}`	The previous item appears n times or more.
`{n,m}`	The previous item appears from n to m times.
`\|`	Or: matches the left side or the right side.
`()`	Group: treats several items as one and keeps the matched text.
`(?: )`	Group that does not keep the text (grouping only).
`[abc]`	One character among a, b, or c.
`[^abc]`	A character that is not a, b, or c.
`[a-z]`	A lowercase letter from a to z.
`\`	Escapes the next symbol so it is taken literally (for example `\.` is an actual dot).
`(?= )`	Lookahead: matches only if what comes after matches, without consuming that text.
`(?! )`	Negative lookahead: matches only if what follows does not match.
`(?<= )`	Lookbehind: matches only if what came before match.
`(?<! )`	Negative lookbehind: matches only if what came before does not match.

Expression

Regex

g — all matches i — case insensitive m — ^ and $ per line s — dot matches line breaks u — unicode

Text

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Result

0 matches