Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

/
/
sig

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"<div[^>]*>\d{6}<\/div>"; string input = @"<div dir=""ltr""><br><br><div class=""gmail_quote""><div dir=""ltr"" class=""gmail_attr""><br></div><u></u> <div> <center id=""m_-2051398760120817894wrapper""> <table id=""m_-2051398760120817894main"" width=""100%""> <tbody><tr id=""m_-2051398760120817894logo""> <td> <table width=""100%""> <tbody><tr> <td> <img src=""test.com/logo.png"" width=""140px"" alt=""xxxxx Logo"" style=""padding:0 10px""> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=""18px""></td> </tr> <tr id=""m_-2051398760120817894header""> <td> <table width=""100%""> <tbody><tr> <td height=""64px"" style=""background-color:#10069f;color:#fff;padding-left:24px;font-weight:700"">Reset your password</td> </tr> </tbody></table> </td> </tr> <tr id=""m_-2051398760120817894content""> <td> <table width=""100%""> <tbody><tr> <td style=""background-color:#f6f5ff;padding:24px 24px 16px 24px""> <p style=""margin-top:0"">The following is the verification code required to complete your password reset.</p> <p style=""margin-bottom:24px"">Enter the following verification code on the screen during the registration, and proceed to the next step.</p> <div style=""display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px"">191418</div> <span style=""display:block;font-size:12px;color:#5d5d5d"">*The verification code is valid only for 24 hours.</span> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=""24px""></td> </tr> <tr id=""m_-2051398760120817894footer""> <td> <table width=""100%""> <tbody><tr> <td style=""background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff""> <table width=""100%""> <tbody><tr> <td id=""m_-2051398760120817894footer-left""> <span style=""display:block"">amnimo Inc.</span> <span style=""display:block"">0-3-30 usaa-fso, xxxxxxxx-shi, Tokyo, 180-8750, Japan</span> <span style=""display:block"">Phone: +81-422-52-6779</span> <span id=""m_-2051398760120817894copyright-mb"" style=""margin-top:16px"">© 2020 <div dir=""ltr""><br><br><div class=""gmail_quote""><div dir=""ltr"" class=""gmail_attr""><br></div><u></u> <div> <center id=""m_-2051398760120817894wrapper""> <table id=""m_-2051398760120817894main"" width=""100%""> <tbody><tr id=""m_-2051398760120817894logo""> <td> <table width=""100%""> <tbody><tr> <td> <img src=""https://test.com/logo.png"" width=""140px"" alt=""Amnimo Logo"" style=""padding:0 10px""> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=""18px""></td> </tr> <tr id=""m_-2051398760120817894header""> <td> <table width=""100%""> <tbody><tr> <td height=""64px"" style=""background-color:#10069f;color:#fff;padding-left:24px;font-weight:700"">Reset your password</td> </tr> </tbody></table> </td> </tr> <tr id=""m_-2051398760120817894content""> <td> <table width=""100%""> <tbody><tr> <td style=""background-color:#f6f5ff;padding:24px 24px 16px 24px""> <p style=""margin-top:0"">The following is the verification code required to complete your password reset.</p> <p style=""margin-bottom:24px"">Enter the following verification code on the screen during the registration, and proceed to the next step.</p> <div style=""display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px"">191418</div> <span style=""display:block;font-size:12px;color:#5d5d5d"">*The verification code is valid only for 24 hours.</span> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=""24px""></td> </tr> <tr id=""m_-2051398760120817894footer""> <td> <table width=""100%""> <tbody><tr> <td style=""background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff""> <table width=""100%""> <tbody><tr> <td id=""m_-2051398760120817894footer-left""> <span style=""display:block"">test Inc.</span> <span style=""display:block"">2-9-32 ssdsa-sss, puakano-shi, Tokyo, 000-8000, Japan</span> <span style=""display:block"">Phone: +81-000-00-652</span> <span id=""m_-2051398760120817894copyright-mb"" style=""margin-top:16px"">© 2020 amnimo Inc.</span> </td> <td id=""m_-2051398760120817894footer-right""> <span style=""display:block"">© 2020 amnimo Inc.</span> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </center> </div> </div></div> Inc.</span> </td> <td id=""m_-2051398760120817894footer-right""> <span style=""display:block"">© 2020 test Inc.</span> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </center> </div> </div></div>"; 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