CBZ is the extension that is given to files that use ZIP compression. These archives store images in PNG or JPEG format. These graphics are handled in the CDispaly program, which displays them in the form of a comic. There are also other comic book viewers that support CBZ files such as Comical and Caliber.

CBZ are files that can also be handled by ZIP archive management programs. However, extracting such an archive and browsing the images manually does not guarantee the correct order of the comic pages.