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
Processing...

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"^(?:(?!\b(eng|ita)\b).)*\K\beng\W+\w+\W+sub\s?ita\b"; string input = @"Lucifer S03e15 [XviD - Eng Mp3 - Sub Ita Eng] DLRip By Pir8 [CURA] Fede e Religioni Lucifer S03e01-08 [XviD - Eng Mp3 - Sub Ita Eng] DLRip By Pir8 [CURA] Fede e Religioni SEASON PREMIERE Young Sheldon S01e13 [SATRip 720p - H264 - Eng Ac3 - Sub Ita] HDTV by AVS Young Sheldon S01e08 [Mux 1080p - H264 - Ita Eng Ac3 - Sub Ita Eng] WEBMux Morpheus Young Sheldon S01e08 [Mux 1080p - H264 - Ita Eng Ac3 - Sub Ita Eng] WEBMux Morpheus Young Sheldon S01e14 [SATRip 720p - H264 - Eng Ac3 - Sub Ita] HDTV by AVS Lucifer S03e15 [XviD - Eng Mp3 - Sub Ita Eng] DLRip By Pir8 [CURA] Fede e Religioni Lucifer S03e16 [XviD - Eng Mp3 - Sub Ita Eng] DLRip By Pir8 [CURA] Fede e Religioni Lucifer S02e01-13 [XviD - Eng Mp3 - Sub Ita] DLRip by Pir8 [CURA] Fede e Religioni FULL Absentia S01e01-10 [Mux 1080p - H264 - Ita Eng Ac3 - Sub Ita Eng] By Morpheus The.X.Factor.UK.S14E01.720p.HDTV.x264-FTP[rartv] The.X.Factor.S14E15.Judges.Houses.1.720p.AMZN.WEBRip.DDP2.0.x264-NTb[rarbg] Face.Off.S12E07.1080p.WEB.x264-CookieMonster[rarbg] Lucifer S02e01 [BDMux 1080p - H264 - Ita Eng Ac3 - Sub Ita Eng NUEng] By Morpheus [CURA] Fede e Religioni Lucifer.S02E01.H264.BDMux.ITA.Ac3.ENG.Ac3.5.1.Subs.RoomCrew.mkv"; RegexOptions options = RegexOptions.IgnoreCase | 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