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

/
/
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"<((?!a|\/a)[^>]*)>\s*"; string substitution = @""; string input = @"<html> <head> <meta http-equiv=\""Content-Type\"" content=\""text/html; charset=utf-8\""> <meta content=\""text/html; charset=us-ascii\""> <meta name=\""ProgId\"" content=\""Word.Document\""> <meta name=\""Generator\"" content=\""Microsoft Word 15\""> <meta name=\""Originator\"" content=\""Microsoft Word 15\""> <style> <!-- @font-face \t{font-family:\""Cambria Math\""} @font-face \t{font-family:Calibri} p.MsoNormal, li.MsoNormal, div.MsoNormal \t{margin:0cm; \tmargin-bottom:.0001pt; \tfont-size:11.0pt; \tfont-family:\""Calibri\"",sans-serif} a:link, span.MsoHyperlink \t{color:#0563C1; \ttext-decoration:underline} a:visited, span.MsoHyperlinkFollowed \t{color:#954F72; \ttext-decoration:underline} p.msonormal0, li.msonormal0, div.msonormal0 \t{margin-right:0cm; \tmargin-left:0cm; \tfont-size:11.0pt; \tfont-family:\""Calibri\"",sans-serif} span.EmailStyle18 \t{font-family:\""Calibri\"",sans-serif} .MsoChpDefault \t{font-size:10.0pt; \tfont-family:\""Calibri\"",sans-serif} @page WordSection1 \t{margin:72.0pt 72.0pt 72.0pt 72.0pt} div.WordSection1 \t{} --> </style> </head> <body lang=\""EN-GB\"" link=\""#0563C1\"" vlink=\""#954F72\"" style=\""\""> <div class=\""WordSection1\""> <p class=\""MsoNormal\"">I NEED TO HAVE THIS STRING</p> <p class=\""MsoNormal\""> </p> <p class=\""MsoNormal\""><span style=\""\"">AND I NEED THE FOLLOWING ANCHOR <a href=\""google.com\""> THIS ONE</a>.</span></p> <p class=\""MsoNormal\""> </p> </div> </body> </html> "; RegexOptions options = RegexOptions.Multiline; Regex regex = new Regex(pattern, options); string result = regex.Replace(input, substitution); } }

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