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  • Enter a Regex
Character classes:
.           any character except newline
\w \d \s    word, digit, whitespace
\W \D \S    not word, digit, whitespace
[abc]       any of a, b, or c
[^abc]      not a, b, or c
[a-g]       character between a & g

^abc$       start / end of the string
\b \B       word, not-word boundary

Escaped characters:
\. \* \\    escaped special characters
\t \n \r    tab, linefeed, carriage return
[\b] \0 \cX backspace, null, control character
\xA9 \u00A9 unicode escaped ©

Groups & Lookaround:
(abc)       capture group
\1          backreference to group #1
(?:abc)     non-capturing group
(?=abc)     positive lookahead
(?!abc)     negative lookahead

Quantifiers & Alternation:
a* a+ a?    0 or more, 1 or more, 0 or 1
a{5} a{2,}  exactly five, two or more
a{1,3}      between one & three
a+? a{2,}?  match as few as possible
ab|cd       match ab or cd

Global, Insensitive, Multiline, Unicode, stickY
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