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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)(deviceToken|device_token|avatarid|avatarId|QPRDBAN1E|summary_text|continue_content)"\s*:\s*"((?:\\"|[^"])+)`) var str = `JsonBody: { "usable_methods" : [ "RANDOM_READER", "QR", "RABO_SCANNER" ], "summary" : { "summary_text" : "\n\t\t\n\t <link rel=\"stylesheet\" type=\"text/css\" media=\"screen,print\" href=\"https://betalen-acpt3.rabobank.nl/ideal-betaling/static/appls/ideal-front-end/ideal-betaling//css/rabo-ideal-payment-qr-ux.css\"/>\n <link rel=\"stylesheet\" type=\"text/css\" media=\"screen,print\" href=\"https://betalen-acpt3.rabobank.nl/ideal-betaling/static/appls/ideal-front-end/ideal-betaling//css/assets/default.css\"/>\n\t\t<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"https://betalen-acpt3.rabobank.nl/ideal-betaling/static/appls/ideal-front-end/ideal-betaling//css/crmv_brit.css\" /> \n\t\t\n\n\n \t\t \n\n \t\t <table class=\"ideal-summary\" cellspacing=\"0\" border=\"0\">\n <thead>\n <tr>\n <th>Naar</th>\n <th>Bedrag</th>\n </tr>\n </thead>\n <tbody>\n <tr>\n <td>\n <strong>Legalname inzake TradeName\n </strong>\n </td>\n <td>\n <strong>&euro; 1,00</strong>\n </td>\n </tr>\n <tr>\n <td>This is a description</td>\n <td></td>\n </tr>\n </tbody>\n </table>\n\n\t\t \t\n\n\n <script type=\"text/javascript\">\n\t\t\twindow.onload = function() { document.title='Betalen met iDEAL'; }\n\t\t</script>\n\t", "summary_lang" : "nl" }, "selected_method" : "RABO_SCANNER", "challenge_data" : { "objectType" : "rabo_scanner_challenge" }, "sign_button_text" : "xx" }` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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 Golang, please visit: https://golang.org/pkg/regexp/