Regular Expressions 101

Save & Manage Regex

  • Current Version: 2
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

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.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"title="".*(title=""(.*.)"">)"; string input = @"<div id=""video_6003150"" class=""thumb-block""><div class=""thumb-inside""><div class=""thumb""><a href=""/video6003150/pure_mature_janet_mason""><img src=""https://cdn77-pic.xvideos-cdn.com/videos/thumbs169l/03/4b/22/034b224b0f77b7260aa8d6c44b49cb69/034b224b0f77b7260aa8d6c44b49cb69.5.jpg"" data-idcdn=""10"" data-videoid=""6003150"" id=""pic_6003150""><div class=""videopv"" style=""display: none;""><a href=""https://www.xvideos.com/video6003150/pure_mature_janet_mason""></a><div class=""progress"" style=""display: none;""><div class=""bar"" style=""width: 100%;""></div></div></div></a></div><button class=""watch-later init-ok"" title=""Ver después""><span class=""icon-f icf-clock""></span></button><a class=""icon-f icf-check-circle icf-white-fill prof-verified-tick"" title=""Modelo verificada"" href=""/verified/videos""></a></div><div class=""thumb-under""><p><a href=""/video6003150/pure_mature_janet_mason"" title=""Pure Mature Janet Mason"">Pure Mature Janet Mason</a></p><p class=""metadata""><span class=""bg""><span class=""duration"">7 min</span><a href=""/channels/puremature""><span class=""name"">Pure Mature</span></a><span><span class=""sprfluous""> - </span> 9,7M <span class=""sprfluous"">Vistas</span></span><span class=""sprfluous""> - </span></span></p></div></div>"; foreach (Match m in Regex.Matches(input, pattern)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx