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

/
/
mg

Test String

Code Generator

Language

Generated Code

const regex = />.*</mg; // Alternative syntax using RegExp constructor // const regex = new RegExp('>.*<', 'mg') const str = `injaseong1949@gmail.com>, Isaac Kim < ibkim4@hotmail.com>, Johnny Kim < johnnykim317@gmail.com>, Kyeongok Kang < sarahkang100b@yahoo.com>, Kyu Han < peterkyuhan@yahoo.com>, Kyu Lee < kyujlee1@gmail.com>, Tae in Kim < tikim58@gmail.com>, Yong Choi < yongskchoi@gmail.com>, 강지연님 크리스찬 타임즈 < vidakang@gmail.com>, 강호재님 < hojaekang@gmail.com>, 권순화님 < shn0802@gmail.com>, 김신영님 < kimsy810@gmail.com>, 김영주님 < lydiatree@gmail.com>, 김유신 목사님 < kgmbc@hotmail.com>, 남소연님 < esthersoyoun@hotmail.com>, 민영미님 < mym0130@hanmail.net>, 박용돈님 < ruthswalve@gmail.com>, 박은경 집사님 < love0528@gmail.com>, 박종구님 < askdad0824@gmail.com>, 박찬일님 < cip717@yahoo.com>, 박해명님 < hlan12@aol.com>, 신광희님 < ky309512@gmail.com>, 아틀란타 기독일보 < atldaily@gmail.com>, 유경희님 < khyouchoi@gmail.com>, 이강평님 < kplee@scu.ac.kr>, 이근상 목사님 < lee@mykoreanchurch.org>, 이무희 장로님 < moohleemd@gmail.com>, 이숙자 전도사님 < sookja37@gmail.com>, 이원 장로님 < wonlee38@gmail.com>, 이은조 전도사님 < eunjol@hotmail.com>, 이의윤님 < euiyunlee@gmail.com>, 이주배 장로님 < jbcommon@gmail.com>, 이지환님 < jeefanlee@gmail.com>, 이창향님 < leejamiex@gmail.com>, 장현덕 집사님 < bokchang22@yahoo.com>, 조선미님 < smc129@hanmail.net>, 최낙신 목사님 < nakchoi@gmail.com>, 최병주님 < 1268bj@hanmail.net>, 최병주 목사님 < cbjmission@gmail.com>, 최승혁 목사님 < bryan.choe@gmail.com>, 탁종희님 < takjoanna@gmail.com>, 황미란 전도사님 < miransh2006@gmail.com> Choanna Kim < choannakim@gmail.com>, Choong Kim lwgmc38@yahoo.com>, hyung kim < hyungkm2006@gmail.com>, Tony Kim < tony@sntmotorsusa.com>, Yoon Kim < yoonie008@gmail.com>, 권태동님 < kwon.61@gmail.com>, 김동일님 < ddongil1023@gmail.com>, 김용웅 목사님 < nambukbc@gmail.com>, 김인저님 < `; // 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