Regular Expressions 101

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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
No Match

~
~
igx

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"#opening tag \{(RAW|ACCESS|DWNLINK|MODL|\w+) #optional attributes (?> \{ ([^}]*) } )? } #optional text and closing tag (?: ( #text:= any char except ""{"", or a ""{"" not followed by /commandname [^{]*+ (?>\{(?!/?\1[{}])[^{]*)*? ) #closing tag \{/\1} )?"; string input = @"<div class=""blog-list-item blog""><header class=""entry-title""> <h1>Welcome to our website</h1> </header><article id=""entry-72"" class=""entry post-72 page et-bg-layout-dark et-white-bg""><div class=""jumbotron row""> <div class=""col-md-8""> <ul> <li>You have a pending job on your neck?&hellip;</li> <li>Do your company need a website makeover ?&hellip;</li> <li>Or a competitive web application ? ?&hellip;</li> <li>Do you need a customized plugin, or a tweak ?&hellip;</li> <li>Maybe you want a personal website ?&hellip;</li> <li>Or a graphic for your new project ?&hellip;</li> </ul> <div class=""bg-primary well""> <h4 class=""text-center text-white shadow"">Track your project as we work it to perfection...</h4> </div> </div> <div class=""pull-right col-md-4""> <h4 class=""bg-primary text-white well"">Other services we offer</h4> {ACCESS{type=500}} <ul> <li>SEO work for an existing website or new</li> <li>Bulk SMS</li> <li>E-currency exchange</li> <li>Facebook AD</li> <li>Google AD</li> </ul> {/ACCESS}</div> {RAW{say=email,access=500}} {RAW} <a class=""btn button large tall green"" href=""client-area"">Place new Job now as we deliver at the quickest <em>reasonable time</em></a>{/RAW}</div></article></div>"; RegexOptions options = RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace; foreach (Match m in Regex.Matches(input, pattern, options)) { 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