PKZ is a file extension used by a computer game called Kart Racing Pro. It is a title developed by Piboso which is a go-kart racing simulator. The gameplay is very realistic and can serve as a training tool for drivers. The program has been developed for Windows systems.

PKZ are files used to store data about the tracks taken by drivers. This data is compressed in ZIP format. PKZ files can be created by users as modifications to the game.