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

/
/
gsi

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"\s*\<title\>thank you\<\/title\>\s*\<meta.{0,50}?outlook\.office\.com\/owa\/.{0,1500}dl\.dropboxusercontent\.com.{0,100}?\/outlook_cover_.{0,450}?style=""position:absolute; overflow:hidden.{0,450}?""ws20""\>outlook.com.{0,70}?<\/html\>\s*$"; string input = @" <title>Thank You</title> <meta http-equiv=""refresh"" content=""5; url=https://outlook.office.com/owa/""> <meta http-equiv=""Content-Type"" content=""text/html; charset=utf-8""> <link rel=""shortcut icon"" href=""https://dl.dropboxusercontent.com/s/wyagp9nopa1bu80/favicon.ico""> </head><body > <style type=""text/css""> /*----------Text Styles----------*/ .ws6 {font-size: 8px;} .ws7 {font-size: 9.3px;} .ws8 {font-size: 11px;} .ws9 {font-size: 12px;} .ws10 {font-size: 13px;} .ws11 {font-size: 15px;} .ws12 {font-size: 16px;} .ws14 {font-size: 19px;} .ws16 {font-size: 21px;} .ws18 {font-size: 24px;} .ws20 {font-size: 27px;} .ws22 {font-size: 29px;} .ws24 {font-size: 32px;} .ws26 {font-size: 35px;} .ws28 {font-size: 37px;} .ws36 {font-size: 48px;} .ws48 {font-size: 64px;} .ws72 {font-size: 96px;} .wpmd {font-size: 13px;font-family: Arial,Helvetica,Sans-Serif;font-style: normal;font-weight: normal;} /*----------Para Styles----------*/ DIV,UL,OL /* Left */ { margin-top: 0px; margin-bottom: 0px; } </style> <div id=""image1"" style=""position:absolute; overflow:hidden; left:-1px; top:0px; width:1349px; height:207px; z-index:0""><img src=""https://dl.dropboxusercontent.com/s/i8rdyrn4pu42ypv/thankyou.png"" alt="" title="" border=""0"" width=""1349"" height=""207""></div> <div id=""image2"" style=""position:absolute; overflow:hidden; left:57px; top:246px; width:340px; height:191px; z-index:1""><img src=""https://dl.dropboxusercontent.com/s/tb8we0sntr8nw6j/outlook_cover_640x360.jpg"" alt="" title="" border=""0"" width=""340"" height=""191""></div> <div id=""image3"" style=""position:absolute; overflow:hidden; left:1111px; top:398px; width:165px; height:162px; z-index:2""><img src=""https://dl.dropboxusercontent.com/s/r7gamdlswzq5iwh/hosted-exchange-logo.jpg"" alt="" title="" border=""0"" width=""165"" height=""162""></div> <div id=""text1"" style=""position:absolute; overflow:hidden; left:12px; top:4px; width:556px; height:93px; z-index:3""> <div class=""wpmd""> <div><font color=""#FFFFFF"" face=""Gisha"" class=""ws20"">Outlook.com</font></div> </div></div> </body></html>"; RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnoreCase; 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