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

/
/
g

Test String

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?:#EXT-X-STREAM-INF:|#EXT-X-I-FRAME-STREAM-INF:)(?:BANDWIDTH=(?<BANDWIDTH>\d+),?|CODECS=(?<CODECS>""[^""]*""),?|RESOLUTION=(?<RESOLUTION>\d+x\d+),?|AUDIO=(?<AUDIO>""[^""]*""),?|SUBTITLES=(?<SUBTITLES>""[^""]*""),?|URI=(?<URI>""[^""]*""),?)*"; string input = @"#EXTM3U #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=""bipbop_audio"",LANGUAGE=""eng"",NAME=""BipBop Audio 1"",AUTOSELECT=YES,DEFAULT=YES #EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID=""bipbop_audio"",LANGUAGE=""eng"",NAME=""BipBop Audio 2"",AUTOSELECT=NO,DEFAULT=NO,URI=""alternate_audio_aac_sinewave/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""English"",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=""en"",URI=""subtitles/eng/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""English (Forced)"",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=""en"",URI=""subtitles/eng_forced/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""Français"",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=""fr"",URI=""subtitles/fra/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""Français (Forced)"",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=""fr"",URI=""subtitles/fra_forced/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""Español"",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=""es"",URI=""subtitles/spa/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""Español (Forced)"",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=""es"",URI=""subtitles/spa_forced/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""日本語"",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE=""ja"",URI=""subtitles/jpn/prog_index.m3u8"" #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID=""subs"",NAME=""日本語 (Forced)"",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE=""ja"",URI=""subtitles/jpn_forced/prog_index.m3u8"" #EXT-X-STREAM-INF:BANDWIDTH=263851,CODECS=""mp4a.40.2, avc1.4d400d"",RESOLUTION=416x234,AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear1/prog_index.m3u8 #EXT-X-I-FRAME-STREAM-INF:URI=""gear1/iframe_index.m3u8"",CODECS=""avc1.4d400d"",BANDWIDTH=28451 #EXT-X-STREAM-INF:BANDWIDTH=577610,CODECS=""mp4a.40.2, avc1.4d401e"",RESOLUTION=640x360,AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear2/prog_index.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=915905,CODECS=""mp4a.40.2, avc1.4d401f"",RESOLUTION=960x540,AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear3/prog_index.m3u8 #EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=297056,CODECS=""avc1.4d401f"",URI=""gear3/iframe_index.m3u8"" #EXT-X-STREAM-INF:BANDWIDTH=1030138,CODECS=""mp4a.40.2, avc1.4d401f"",RESOLUTION=1280x720,AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear4/prog_index.m3u8 #EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=339492,CODECS=""avc1.4d401f"",URI=""gear4/iframe_index.m3u8"" #EXT-X-STREAM-INF:BANDWIDTH=1924009,CODECS=""mp4a.40.2, avc1.4d401f"",RESOLUTION=1920x1080,AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear5/prog_index.m3u8 #EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=669554,CODECS=""avc1.4d401f"",URI=""gear5/iframe_index.m3u8"" #EXT-X-STREAM-INF:BANDWIDTH=41457,CODECS=""mp4a.40.2"",AUDIO=""bipbop_audio"",SUBTITLES=""subs"" gear0/prog_index.m3u8"; foreach (Match m in Regex.Matches(input, pattern)) { 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