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

r"
"
gm

Test String

Code Generator

Language

Generated Code

const regex = new RegExp('[^\\d]((\\+49|0049|0)1[567]\\d{1,2}([ \\-/]*\\d){7})(?!\\d)', 'gm') const str = `################################### This is allowed ########################## +49 15207930698 +49 15207955279 +49 915175461907 +4915207829969 +4915368831169 +491771399487 +4917697300278 +4915902955865 +491771789427 +4917697400179 +4915903904567 +4915902944599 +491739341284 +4915902944599 +4915903904567 The number +491739341284 with some text Germany  +4915255687865Total SMS: 6758 This number 015731294508 we need! 015731294508 015735995842 015168433343 Here:015731294508Hallo Here:015731294508 <td>01573 / 1294-508</tr> <td>015731294508</tr> Eine Nummer: 01515 84 333 78 Wichtige Nummer:015731294508. Noch eine Nummer-015731294508, 015731294508Hier <td>01573 1294 508</tr> ################################### This is NOT allowed ########################## 012345678901234 123w345345345345 0123456789101191919 +4915902 +491590123 +4915903567 +49177178796 +49159039012341 +491590345985412 Invalid number +491590345985412 within text +12127319863 +13322014056 +12126712234 +427532697710 +417868150810 +287533002875 +49 1739341284 (+49) 1739341284 +49 17 39 34 12 84 +49 (1739) 34 12 84 +(49) (1739) 34 12 84 +49 (1739) 34-12-84 `; // 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