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

const regex = /^(?<title>.+?)[_.\s-]+(?<season>S\d+)(?:[.\-\s_]*?(?<seasonmax>S?\d+))?(?=[_.\s](?!E\d+))/img; // Alternative syntax using RegExp constructor // const regex = new RegExp('^(?<title>.+?)[_.\\s-]+(?<season>S\\d+)(?:[.\\-\\s_]*?(?<seasonmax>S?\\d+))?(?=[_.\\s](?!E\\d+))', 'img') const str = `daily.show.name.2023.04.18.guest.name.1080p.web.h264-jebaited.mkv BBC.News.at.Ten.2023.10.11.1080i.HDTV.DD2.0.H.264-BLS WWE.NXT.2023.10.10.720p.WEB.h264-SPORTSNET Tesco.How.Do.They.Really.Do.It.2023.1080p.HDTV.H264-DARKFLiX Seth.Meyers.2023.10.09.Amy.Sedaris.1080p.WEB.h264-EDITH NFL.2023.10.09.49ers.Vs.Cowboys.UNCUT.1080p.WEB.H264-SPORTSNET Neighbours.S39E012.2023-10-05.Episode.8915.1080p.AMZN.WEB-DL.DDP2.0.H.264-SDCC DFL.Supercup.2023 08 12.Bayern.Munchen.vs.RB.Leipzig.HDTV.2160p.AAC2.0.HEVC.mkv The Late Show with Stephen Colbert (2015) - 2023-10-05 - Bob Odenkirk Fortune Feimster [2.0 WEBDL-1080p][x264]-EDITH.mkv Anger Management (2012) - S02E15 - Charlies Patients Hook Up [WEBDL-1080p][AC3 5.1][h264]-BS.mkv Ahsoka (2023) - S01E01 - Part One Master and Apprentice [DSNP WEBDL-1080p][EAC3 Atmos 5.1][h264]-NTb.mkv' Loki - S01E01 - Glorious Purpose [DSNP WEBDL-1080p Proper][EAC3 Atmos 5.1][h264]-TOMMY.mkv' Family - Guy (1999) - S01E01 - Death Has a Shadow [DSNP WEBDL-1080p][AAC 2.0][h264]-PHOENiX.mkv' Neighbours.S39E012.2023-10-05.Episode.8915.1080p.AMZN.WEB-DL.DDP2.0.H.264-SDCC Rick and Morty (2013) - S06E06 - JuRicksic Mort [HMAX DD 5.1 WEBDL-1080p][x264]-NTb.mkv 1923.S01E01.1080p.BluRay.TrueHD5.1.H.264-SLIPSTREAM 11.22.63.S01E01.2160p.WEB-DL.DDP5.1.H.265-NiXON 1923.S01.1080p.BluRay.TrueHD5.1.H.264-SLIPSTREAM 11.22.63.S01.2160p.WEB-DL.DDP5.1.H.265-NiXON Hello.World.S01.ntb.mkv Hello.World.S01 - S03.ntb.mkv Hello.World.S1.ntb.mkv Hello.World.S01 S03.ntb.mkv Hello.World.S01.Extras.ntb.mkv Hello_World_S01_S02.ntb.mkv Hello_World_S01-S03_ntb.mkv Hello_World_S1_ntb.mkv Hello.World.S1E03.ntb.mkv Hello.World.S031 E01.ntb.mkv Hello_World_S01E01_ntb.mkv Hello_World_S1E03_ntb.mkv Hello.World.S01.E01.ntb.mkv Hello_World_S01_E01_ntb.mkv`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions