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

Substitution

Processing...

Code Generator

Language

Generated Code

const regex = /[\r\n]+/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('[\\r\\n]+', 'gm') const str = `#EXTINF:-1 tvg-name="seedocs" tvg-logo="RT",RT http://rt.ashttp14.visionip.tv/live/rt-global-live-HD/playlist.m3u8 #EXTINF:-1 tvg-name="hsn" tvg-logo="hsn",HSN TV rtsp://hsn.mpl.miisolutions.net:1935/hsn-live01/_definst_/mp4:420p500kB31 #EXTINF:-1 tvg-name="us" tvg-logo="us",USTwit http://bglive-a.bitgravity.com/twit/live/high #EXTINF:-1 tvg-name="ALJAZEERA" tvg-logo="aljazeera",Aljazeera rtmp://aljazeeraflashlivefs.fplive.net/aljazeeraflashlive-live/aljazeera_eng_high #EXTINF:-1 tvg-name="bbc" tvg-logo="bbc",BBC World News #EXTINF:-1 tvg-name="vevo" tvg-logo="vevo",Vevo http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch1/06/prog_index.m3u8 #EXTINF:-1 tvg-name="vevo2" tvg-logo="vevo2",Vevo 2 http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch3/06/prog_index.m3u8 #EXTINF:-1 tvg-name="1HD" tvg-logo="1HD",1HD rtmp://109.239.142.62/live/livestream3`; const subst = `\n`; // The substituted value will be contained in the result variable const result = str.replace(regex, subst); console.log('Substitution result: ', result);

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