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
Processing...

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)^[0-9a-zA-Z]{10}.*([A-Z\s]{16,})\\n`) var str = ` 4nXQOweFyC\x10HWANG SEAN SOJIN\n ^[0-9a-zA-Z]{10}\\[0-9a-z]{3}([A-Z\s]{3,})\\n ^[0-9a-zA-Z]{10}\\x10([A-Z\s]{3,})\\n ^[0-9a-zA-Z]{10}\\x14([A-Z\s]{3,})\n # 정의되어야 함 4nYBfE4dug\x07GUO JIE\n 4nYWf22CBO\x08LI FULAN\n ^[0-9a-zA-Z]{10}\\x08([A-Z\s]{3,})\\n 4mfP1jNaF4\x14광진실리콘(주)\n 4nXckRULYB\x0fCHANG LAI HSIEN\n 0UN97Wa9oU\t507030360A0130(\x010\x011\x011\x010\x0202\x011(\x010(\x010\x01N\x0b20년/20년\x082021031860860\x012\x011\x03B\x011\x01N\x0820210318\x0820210318\x0820210318\x132021-03-18 12:01:34\x011\x0fCHANG LAI HSIEN\x132021-03-18 10:57:01\x132021-03-18 10:57:14\x02[메리츠화재] 모바일 전자서명 안내\n 4nAjfKqh8i\x0bQUAN CANXIE\n ^[0-9a-zA-Z]{10}\x0b(\([가-힣].*)\n ^[0-9a-zA-Z]{10}([A-Z가-힣\s]{2,})\\n 4nXzVRFyIl\tJIN GUANGMAN\n 4nXzVRFyIl\t김현수\n 4nJcIVZHxD\x0b(주)철마\n ^[0-9a-zA-Z]{10}\\x0b(\\([가-힣].*)\\n ^[0-9a-zA-Z]{10}\\x0b(\([가-힣].*)\\n ^[0-9a-zA-Z]{10}\t([A-Z가-힣\s]{2,})\n ^[0-9a-zA-Z]{10}\\t([A-Z가-힣\s]{2,})\\n ^[0-9a-zA-Z]{10}\t([A-Z가-힣\s]{2,})\n` 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/