Regular Expressions 101

Please wait while the app is loading...

Regular Expressions 101

@regex101DonateSponsorContactBug Reports & FeedbackWikiWhat's new?

Save & Share

  • Save Regex
    ctrl+s
  • Go to library entry

FlavorNeed help selecting flavor?

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET (C#)
  • Rust

Function

  • Match
  • Substitution
  • List
  • Unit Tests
Sponsors
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.

Regular Expression
No Match

Regex Versions

r"

Delimiters

"
gm

Regex Flags

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

Loading code sample...

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions