var pw = "ksn73ADkdfdd" var regex = /^.*(?=.{12,})(?=(.*[A-Z]){2})(?=(.*[a-z]){2})(?=(.*\d){2})(?=(.*\W){2})(?!.*\s).*$/; // ^.* = start // (?=.{12,}) = min. 12 length // (?=(.*[A-Z]){2}) = min. 2 uppercases // (?=(.*[a-z]){2}) = min. 2 Lowercases // (?=(.*\d){2}) = min. 2 Numbers // (?=(.*\W){2}) = min. 2 Special Chars // (?!.*\s) = no blank space // .*$ = end console.log(regex.test(pw)); // source https://stackoverflow.com/a/33051728/4324393