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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`ggg`) var str = `The_Hink 8 G Mr.Lol https://namemc.com/profile/Mr.LoL/6e27dd0e $ https://namemc.com/profile/$/dce40453 ^(?![0-9a-zA-Z\_]{1,16}.)*$ [Admin] Hink [Mod] Hink asd [] asd [] Nigger [[ ]] ][ .*?[\[](.+)?[\]].* ^([^a-zA-Z0-9]*|.*[^a-zA-Z0-9]*)?[\h\H\Ĥ\ĥ\Ħ\ħ][^a-zA-Z0-9]*[\i\I\!\|\Ì\ì\Í\í\Î\î\Ï\ï\!\|][^a-zA-Z0-9]*[\n\N\Ń\ń\Ņ\ņ\Ň\ň\ʼn\Ŋ\ŋ][^a-zA-Z0-9]*[\k\K\Ķ\ķ\ĸ].*?$ hink Hink HiNk hnk think hink -hink_ h-i-n-k h i n k kys hink idk hink what's up? stop being a nif t hink 2 2 hi___nk 22 ^([^a-zA-Z0-9]*|(.*[^a-zA-Z0-9]+))?[hH\Ĥ\ĥ\Ħ\ħ][^a-zA-Z0-9]*[iI!|\Ì\ì\Í\í\î\Ï\ï][^a-zA-Z0-9]*[nN\Ń\ń\Ņ\ņ\Ň\ň\ʼn\Ŋ\ŋ][^a-zA-Z0-9]*[kK\Ķ\ķ\ĸ].*$ Hink hink think hink is cunt lick my cunt hink h - ink h ---inK+_ ĤÏNķ think sticky hinky ^[\h\H\Ĥ\ĥ\Ħ\ħ][\i\I\!\|\Ì\ì\Í\í\Î\î\Ï\ï][\n\N\Ń\ń\Ņ\ņ\Ň\ň\ʼn\Ŋ\ŋ][\k\K\Ķ\ķ\ĸ]$ ^.*[\⁢\ㅤ\ﾠ\ᅠ\ᅟ].*$ ^.*[\u2062\u3164\uFFA0\u1160\u115F].*$ http://www.fileformat.info/info/unicode/char/2062/index.htm: "⁢" http://www.fileformat.info/info/unicode/char/3164/index.htm: "ㅤ" http://www.fileformat.info/info/unicode/char/ffa0/index.htm: "ﾠ" http://www.fileformat.info/info/unicode/char/1160/index.htm: "ᅠ" http://www.fileformat.info/info/unicode/char/115f/index.htm: "ᅟ" ^([^a-zA-Z0-9]*|(.*[^a-zA-Z0-9]+))?[hH][^a-zA-Z0-9]*[iI!][^a-zA-Z0-9]*[nN][^a-zA-Z0-9]*[kK].*$ ` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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 Golang, please visit: https://golang.org/pkg/regexp/