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

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"\w+:\/\/(?:\w+@)?([\w\-\.]+)"; string input = @"http://falloutboy.com/ http://xn----7sbajjbec0dd3k7b.xn--p1ai/vse_serii_podryad/multiki http://www.adobe.com/ru/ http://www.mamba.ru/en/ http://lurkmore.to/%D0%90%D0%BA%D1%83%D0%BD%D0%B8%D0%BD https://ru.bongacams.com/ http://user@example.com https://en.wikipedia.org/wiki/Java_version_history http://rutor.info/ https://www.youtube.com/user/momondo http://totori.ru/bezdomnyj-bog-2-sezon-12-seriya http://xn-----7kcabbec2afz1as3apmjtgqh4hrf.xn--p1ai/dlya-komyutera/viber-dlya-windows-7 http://lurkmore.to/%D0%90%D0%BA%D1%83%D0%BD%D0%B8%D0%BD http://www.povarenok.ru/recipes/show/42046/ http://blog.t-stile.info/v-vashem-aktive-net-inostrannyx-yazykov-ne-kruchintes http://www.bibo.kz/aforizmi/393836--chto-pervichno-jajjco-ili-kurica-.html https://yandex.ru/search/?lr=2&clid=2233330&win=195&msid=1485784820.7601.20943.16306&text=самый%20первый%20фильм%20в%20мире&example_source=all&nl=1 http://lib.mexmat.ru:80/books/90359"; RegexOptions options = RegexOptions.Multiline; 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