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

/
/
gmi

Test String

Code Generator

Language

Generated Code

const regex = /^(N|S)?\s*(\d*[.])?\d+(\x{00b0}\s*)?((\d*[.])?\d+((\x{0022})|((\x{0027}\s*)?)?((\d*[.])?\d+?(\x{0022})?)?))?[\s\x{002c}]+(W|E)?\s*(\d*[.])?\d+(\x{00b0}\s*)?((\d*[.])?\d+((\x{0022})|((\x{0027}\s*)?)?((\d*[.])?\d+(\x{0022})?)?))?$/gmi; // Alternative syntax using RegExp constructor // const regex = new RegExp('^(N|S)?\\s*(\\d*[.])?\\d+(\\x{00b0}\\s*)?((\\d*[.])?\\d+((\\x{0022})|((\\x{0027}\\s*)?)?((\\d*[.])?\\d+?(\\x{0022})?)?))?[\\s\\x{002c}]+(W|E)?\\s*(\\d*[.])?\\d+(\\x{00b0}\\s*)?((\\d*[.])?\\d+((\\x{0022})|((\\x{0027}\\s*)?)?((\\d*[.])?\\d+(\\x{0022})?)?))?$', 'gmi') const str = `n 1 e 0 n 1.1 e 0 n49.54.15.21 e1 n49.54.15.21° e1 n49.54.15.21' e1 n49.54.15.21" e1 n49.54' 15.24" e1 n49.54' 15.24.541" e1 n49.54.15.21' 5456.4646" e1 n 1° e 0 n 1.1° e 0 n 1.1.1° e 0 n 1°1 e 0 n 1.1°1 e 0 n 1°1' e 0 n 1.1°1' e 0 n 1.1°1.1 e 0 n 1.1°1.1' e 0 n 1°1.1.1 e 0 n 1.1°1.1.1 e 0 n 1°1.1.1' e 0 n 1.1°1.1.1' e 0 n 1.1°12.12.12 e 0 n 1.1°12.12.12' e 0 n 1°1" e 0 n 1.1°1" e 0 n 1°1.12.21" e 0 n 11.11°12.212.21" e 0 n 11.11°11.1111'12212.21" e 0 n 11.11°11.11.11'12212.21" e 0 n 11.11°11.1111'12.212.21" e 0 N 0° 00' 000.000" E 0° 00' 000" N0°00'000 E0°00' n 0° 00 , w 0° 00.000 S 0° 0" ,E 0° 0.00" s 0.00°, w0 N 49°121.47.247",W16°5496.2944466.54" N 49°12.41.47247",W16°54.96'4.2946654"`; // 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