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

const regex = /(\w+){2,}/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('(\\w+){2,}', 'g') const str = `These are words they killed a deer \$!@#abcd^#\$%# 1234 (hi&) Poproszę pieczonego ziemniaka UA-AA. Poproszę miejsce na balkonie. Poproszę piwo. .Poproszę piwo, stek z frytkami i specjalną sałatkę szefa. Poproszę czarno biały film. Poproszę koc i poduszkę FAA:kol JF-109. Poproszę. koc i poduszkę 45-minutoowe. Poproszę .koc. * 1-2 Poproszę modelowanie włosów John-3:16. Poproszę jajko na twardo, sok pomarańczowy i chleb. , ｜ ｜ . , , ∩ ﾟ ∀ ﾟ . ━ ━ ━ ┗ ｡ ◕ ‿ ‿ ◕ ｡ . ↑ ？ ？ ？ . ☆ , ｡ ･ ･ ﾟ ･ ･ ﾟ ★ . ๏ ๏ ๏ ๏ ๏ ๏ , ๏ ๏ ๏ ๏ ๏ ๏ ♥ . ░ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ­ ­ ­ ­ ❀ ♥ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ­ ­ ­ ❀ ­ ♥ ­ ­ ❀ ♥ ♥ ❀ ♥ ❀ ♥ ­ ­ ­ ❀ ♥ █ █ ─ █ █ ▀ █ █ █ ▀ █ █ █ ▀ █ █ █ ─ █ ─ █ █ ─ █ █ ▀ █  █ █ ─ ─ █ █ ▀ █ ─ █ ▀ █ █ ▀  █ █ █ ─ █ █ █ ▀ █ █ ▀ ▌ █ ▀ █ ▌ ▀ █ ▌ █ ▀ ▀ ▌ █ ▀ ▀  ▀ ▌ █ ▀ ─ ▌ █ ─ █ ▌ ▀ █ ▌ █ ─ ─ ▌ █ ▀ ▌ █ █ ─ ▌ █  ─ ▌ █ ▌ █ █ ▌ █ ▀ ▀ ▌ █ ▀ ▀ ─ ▀ ▀ ─ ▀ ▀ ▀ ─ ─ ▀ ▀ ─ ─ ─ ▀ ▀ ─ ─ ─ ▀ ▀ ─ ▀ ─ ▀ ▀ ▀ ▀ ▀ ▀ ▀ ▀ ▀ ─ ▀ ─ ▀ ▀ ─ ▀ ▀ ▀ ─ ▀ ▀ ▀ ▀  ▀ ▀ ▀  ░ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ­ ­ ­ ­ ­ ­ ❀ ♥ ♥ ♥ ❀ ♥ ❀ ♥ ❀ ♥ ­ ❀ ­ ♥ ­ ­ ­ ­ ❀ ♥ ♥ ❀ ♥ ❀ ♥ Ｄ ­ ＡＹ . ● ▬ ▬ ▬ ▬ ▬ ▬ ▬ ๑๑ ▬ ▬ ▬ ▬ ▬ ▬ ▬ ▬ ● . ● ▬ ▬ ▬ ▬ ▬ ๑๑ ▬ ▬ ▬ ▬ ▬ ▬ ● . （ － 。 － ） ｚｚＺＺＺ .`; // 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