The maximum length for a WPA2 password is 63 characters. Although most IT experts consider the longer the password, the better, most of us will never use 63 characters. Most of us want to use passwords that are ‌shorter. You can use as few as eight characters if you would like. Experts suggest avoiding words you might find in the dictionary. Hackers can attempt to guess your password repeatedly without your knowledge, so keep that in mind when choosing one. For the best security, the more random the password, the better. You do not have to use 63 characters, but stretching it to 20 is a good middle ground.