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

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)Stuff `) var str = `"video_title":"Chubby soccer mom sucking my cock during her sons game","defaultQuality":[480,240,720,1080],"vcServerUrl":"/svvt/add?stype=svv&svalue=144220772&snonce=ecjcjh6urryiu3oz&skey=d1d1f93a1d36b34372e7ec1e7573a0a93408ca24d85020acf76bb670315908a0&stime=1533904116","mediaDefinitions":[{"defaultQuality":false,"format":"","quality":"720","videoUrl":"https:\/\/dm.phncdn.com\/videos\/201712\/06\/144220772\/720P_1500K_144220772.mp4?ttl=1533907590&ri=1024000&rs=832&hash=4e134e89b30b666914112869908c3b73"},{"defaultQuality":true,"format":"","quality":"480","videoUrl":"https:\/\/dm.phncdn.com\/videos\/201712\/06\/144220772\/480P_600K_144220772.mp4?ttl=1533907590&ri=1024000&rs=632&hash=9d42c16aac1c7a55b77a24a6fc4f9358"},{"defaultQuality":false,"format":"","quality":"240","videoUrl":"https:\/\/dm.phncdn.com\/videos\/201712\/06\/144220772\/240P_400K_144220772.mp4?ttl=1533907590&ri=1024000&rs=368&hash=aebcfab4acd30f62c9a807c74791c18b ` 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/