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

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"<script.*src.*edge.*<\/script>"; string input = @"<!DOCTYPE html> <html> <head> <meta http-equiv=""Content-Type"" content=""text/html; charset=utf-8""/> <meta http-equiv=""X-UA-Compatible"" content=""IE=Edge""/> <title>Untitled</title> <!--Adobe Edge Runtime--> <meta http-equiv=""X-UA-Compatible"" content=""IE=Edge""> <script src=""//ad.adverticum.net/scripts/goa-helper.js""></script> <script type=""text/javascript"" charset=""utf-8"" src=""http://animate.adobe.com/runtime/5.0.0/edge.5.0.0.min.js""></script> <style> .edgeLoad-EDGE-20744748 { visibility:hidden; } </style> <script> AdobeEdge.loadComposition('MM_Gyor_Huawei_1112-1114_HTML5_720x250', 'EDGE-20744748', { scaleToFit: ""none"", centerStage: ""both"", minW: ""0"", maxW: ""undefined"", width: ""720px"", height: ""250px"" }, {""dom"":{}}, {""dom"":{}}); </script> <!--Adobe Edge Runtime End--> </head> <body style=""margin:0;padding:0;""> <div id=""Stage"" class=""EDGE-20744748""></div> </body> </html>"; 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