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RegExp Tester Real-time regex syntax and match highlighting
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*Regexp pattern
BracketsBrackets are used to find a range of characters:
[abc]Find any character between the brackets
[^abc]Find any character not between the brackets
[0-9]Find any digit from 0 to 9
[A-Z]Find any character from uppercase A to uppercase Z
[a-z]Find any character from lowercase a to lowercase z
[A-z]Find any character from uppercase A to lowercase z
[adgk]Find any character in the given set
[^adgk]Find any character outside the given set
(red|blue|green)Find any of the alternatives specified
MetacharactersMetacharacters are characters with a special meaning:
.Find a single character, except newline or line terminator
\wFind a word character
\WFind a non-word character
\dFind a digit
\DFind a non-digit character
\sFind a whitespace character
\SFind a non-whitespace character
\bFind a match at the beginning/end of a word
\BFind a match not at the beginning/end of a word
\0Find a NUL character
\nFind a new line character
\fFind a form feed character
\rFind a carriage return character
\tFind a tab character
\vFind a vertical tab character
\xxxFind the character specified by an octal number xxx
\xddFind the character specified by a hexadecimal number dd
\uxxxxFind the Unicode character specified by a hexadecimal number xxxx
Quantifiers
n+Matches any string that contains at least one n
n*Matches any string that contains zero or more occurrences of n
n?Matches any string that contains zero or one occurrences of n
n{X}Matches any string that contains a sequence of X n's
n{X,Y}Matches any string that contains a sequence of X to Y n's
n{X,}Matches any string that contains a sequence of at least X n's
n$Matches any string with n at the end of it
^nMatches any string with n at the beginning of it
?=nMatches any string that is followed by a specific string n
?!nMatches any string that is not followed by a specific string n