Test and debug regular expressions with live matching
* - 0 or more
+ - 1 or more
? - 0 or 1
{n,m} - Between n and m
^ - Start of string
$ - End of string
\b - Word boundary
\B - Non-word boundary
(abc) - Capture group
(?:abc) - Non-capture group
[abc] - Character set
[^abc] - Negated set