What file formats are commonly used for digital comics, and how do I read them?

Digital comics are most commonly found in CBR (Comic Book Reader) or CBZ (Comic Book Zip) formats. These are essentially archives (RAR or ZIP, respectively) containing image files (JPEG, PNG) of each comic page. They can be read using dedicated comic reader software on computers (like CDisplayEx, ComicRack) or mobile apps (like Chunky Comic Reader for iOS, ComicRack for Android, or the official Marvel Unlimited app which uses its own proprietary format).