Test regular expressions with live highlighting and capture groups. Runs in your browser.
MATCHES 0
MATCH DETAILS
CHEATSHEET
.any character\ddigit [0-9]\wword char [a-zA-Z0-9_]\swhitespace^start of string$end of string*0 or more+1 or more?0 or 1{n,m}between n and m(abc)capture group[abc]character classa|balternation\bword boundary(?:abc)non-capturing group(?=abc)positive lookahead