6 digits. The Pizza Hut gift card password is 6 digits. The rules for Pizza Hut gift cards are: 19-digit card number and 6-digit password. Pizza Hut is one of the pizza specialty chain companies. The first Pizza Hut restaurant was founded in Wichita, Kansas, USA in 1958 by two brothers, Frank Carney and Dan Carney, with $600 borrowed from their mother.