Regular Expressions 101

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Function

  • Match
  • Substitution
  • List
  • Unit Tests (27)

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An explanation of your regex will be automatically generated as you type.
  • 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

`
`

Unit Tests

Chrome 77
Chrome 67
Chrome 66
Chrome 51
Chrome 80
Chrome 99
Chrome 115
Chrome 31
Chrome 1234
Chrome with Spaces
Single Number Version
YaBrowser
YaApp
Chrome in the end
Chrome in the end, single number version
StupidChrome
StupidChrome in the beginning
Opera 56 on Windows 10
Opera 53 on Windows 7
Samsung Browser 9.2 on Android 9
MIUI 10.3 on Android 9
Samsung Browser 8 on Android 8.1
Android Browser 4 on Android
Internet Explorer 11 on Windows 7
Firefox 56 on Windows 10
Edge 44.18362.1.0 on Windows 10
Edge 44.17763 on Windows 10