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Regular Expression

Learn, build and test Regular Expressions (Regex)

Regex

Paragraph

RegExr was created by gskinner.com.

Edit the Expression & Text to see matches. Roll over matches or the expression for details. PCRE & JavaScript flavors of RegEx are supported. Validate your expression with Tests mode.

The side bar includes a Cheatsheet, full Reference, and Help. You can also Save & Share with the Community and view patterns you create or favorite in My Patterns.

Explore results with the Tools below. Replace & List output custom results. Details lists capture groups. Explain describes your expression in plain English.

RegExr was created by gskinner.com.

Edit the Expression & Text to see matches. Roll over matches or the expression for details. PCRE & JavaScript flavors of RegEx are supported. Validate your expression with Tests mode.

The side bar includes a Cheatsheet, full Reference, and Help. You can also Save & Share with the Community and view patterns you create or favorite in My Patterns.

Explore results with the Tools below. Replace & List output custom results. Details lists capture groups. Explain describes your expression in plain English.

Explanation

(Capturing group. Groups multiple tokens together and creates a capture group for extracting a substring or using a backreference.

[Character set. Match any character in the set.

A-ZRangeMatches a character in the range "A" to "Z" (char code 65 to 90).

]

)

\wWord.Matches any word character (alphanumeric & underscore).

+QuantifierMatch 1 or more of the preceding token.

FlagsIs an optional parameter to a regex that modifies its behavior of searching.

gGlobal.All matches (don't return after first match)

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