Test and validate regular expressions with live matching and highlighting
. - Any character\d - Digit (0-9)\w - Word character\s - Whitespace* - 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() - Capturing group(?:) - Non-capturing[] - Character set| - Alternation