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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

Substitution
Processing...

Code Generator

Language

Generated Code

const regex = /(.*) ((youtube.com) | (youtu.be) | (www.youtube.com) ) (.*)/gmi; // Alternative syntax using RegExp constructor // const regex = new RegExp('(.*) ((youtube.com) | (youtu.be) | (www.youtube.com) ) (.*)', 'gmi') const str = `http://youtu.be/cCnrX1w5luM www.youtube.com/cCnrX1w5luM youtu.be/cCnrX1w5luM https://www.youtube.com/watch?v=nzj7Wg4DAbs http://www.youtube.com/watch?v=nzj7Wg4DAbs youtube.com/watch?v=nzj7Wg4DAbs http://www.youtube.com/watch?v=-wtIMTCHWuI http://www.youtube.com/v/-wtIMTCHWuI?version=3&autohide=1 http://youtu.be/-wtIMTCHWuI http://www.youtube.com/oembed?url=http%3A//www.youtube.com/watch?v%3D-wtIMTCHWuI&format=json Hello https://www.youtube.com/watch?v=nzj7Wg4DAbs world `; const subst = `<iframe src="htpp://youtube.com$6" allowfullscreen></frame>`; // 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