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 = /\(\\x07([0-9]{4,})|\(\\t([0-9]{4,})\(/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('\\(\\\\x07([0-9]{4,})|\\(\\\\t([0-9]{4,})\\(', 'gm') const str = `#걸려야함 4nYoywMzx6630636\\x010\\x0200\\x011\\x011\\x03\\x14\\x03\\x14\\x03\\x03\\x0820210430\\x0820410430\\x0820210430\\x0820410430\\x03(\\x071000000(\\x041190\\x03.\\x0202(\\x010\\x03d\\x08207504306AAAU(\\x0230\\x1e012020460104600200000000020020\\x1e01202046010460020000000002002030630636009910200201020020000999--020020------2-01--\\x03CTL\\x013(\\x010(\\x010(\\x010(\\x010(\\x010(\\x010(\\x010\\x03#NA(\\x011(\\x010(\\x010(\\x010\\x011\\x03(\\x011\\x03-\\x01 \\x03#NA\\x011\\x01 \\x011\\x0200(\\x041190(\\x010\\x03N갱신형 재진단암진단비(2년 대기형)[기본계약](계속보장형)\\x03\\x01 \\x012\\x03#NA\\x03\\x03#NA(\\x041190\\x03#NA(\\x010\\x012\\x03#NA\\x03#NA\\x010(\\x010(\\x010(\\x010(\\x010(\\x010(\\x010\\x03(\\x010\\x03\\x03\\x03\\x03(\\x010\\x0220\\x01 \\x01 (\\x010\\x03\\x01{\\x03\\x03\\x03\\n 4nYpMQSq0v620255\\x010\\x0200\\x011\\x011\\x03\\x01\\x03\\x01\\x03\\x03\\x0820210430\\x0820220430\\x0820210430\\x0820220430\\x03(\\x0850000000(\\x041320\\x03*\\x0201(\\x0215\\x03\\x08203604306AABI(\\x011\\x1c0100104223310010000000001001\\x1c0100104223310010000000001001/0620255009990009999000999000999----------2-01--\\x03CTL\\x013(\\x010\\x011(\\x010(\\x010(\\x010(\\x010(\\x010(\\x010\\x03#NA(\\x011(\\x010(\\x010(\\x010\\x011\\x03(\\x011\\x03)\\x01 \\x03#NA\\x011\\x01 \\x011\\x0200(\\x041811(\\x010\\x03\\x1f갱신형 상해입원의료비\\x03\\x03100\\x011\\x03#NA\\x03\\x03#NA(\\x041320\\x013(\\x010\\x012\\x03#NA\\x03#NA\\x011(\\x010(\\x010(\\x010(\\x010(\\x010(\\x010\\x03(\\x010\\x03\\x03\\x03\\x03(\\x010\\x0201\\x01 \\x01 (\\x010\\x03_\\x01{\\x03\\x03\\x02\\n \\(\\\\x08([0-9]{4,})\\([0-9]{3,} '4nXfg3E6Qb(\\x011(\\x011\\x03CTL\\x133190026942021031120\\x0201\\x040001\\n' `; // 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