Manga in CBZ format is a hidden convenience that many fans — from casual readers to obsessive archivists — quietly swear by. CBZ (Comic Book Zip) is a simple container: a ZIP archive renamed with a .cbz extension that holds image files in sequence. For manga, that simplicity becomes a canvas for both preservation and presentation.
Most official stores give you PDFs or proprietary formats. Here is how to convert them to CBZ. manga cbz files
Method 1: From extracted images
Method 2: Using Calibre (The "Library" approach) Manga in CBZ format is a hidden convenience