Regex Tester

.Any character (except newline) \dDigit [0-9] \DNon-digit \wWord char [a-zA-Z0-9_] \WNon-word char \sWhitespace \SNon-whitespace [abc]Any of a, b, or c [^abc]Not a, b, or c [a-z]Range: a to z

*0 or more +1 or more ?0 or 1 {n}Exactly n {n,}n or more {n,m}Between n and m *?Lazy: 0 or more +?Lazy: 1 or more

^Start of string/line $End of string/line \bWord boundary (abc)Capturing group (?:abc)Non-capturing group (?<name>abc)Named group \1Backreference to group 1 a|bAlternation: a or b

(?=abc)Positive lookahead (?!abc)Negative lookahead (?<=abc)Positive lookbehind (?<!abc)Negative lookbehind

$1, $2Capture group 1, 2 $&Entire match $`Before match $'After match