Free online CBZ to MOBI converter

Source format: CBZ

CBZ is a comic book archive format that stores a sequence of image files, usually .jpg, .png, or .webp, inside a ZIP container. It is widely used for comic books, manga, graphic novels, and webcomics. The format is simple and portable, and many comic-reading apps can open it directly.

Target format: MOBI

MOBI is an e-book format originally associated with Mobipocket and later supported by Amazon Kindle devices and apps. It is designed mainly for reflowable text, with features such as text resizing, bookmarks, and device-friendly navigation. MOBI is well suited to novels and manuals, but it is not an ideal match for image-heavy comics.

How to convert cbz to mobi

Converting CBZ to MOBI is possible, but the result depends on the comic layout and the conversion tool. Because CBZ is image-based and MOBI is primarily text-oriented, the output often behaves more like an image book than a true comic reader format.

1. Check the CBZ file. Make sure the archive is not corrupted and that the pages are in the correct order. If you want to inspect the contents, you can temporarily rename .cbz to .zip, open it, and then restore the original extension.
2. Use Calibre on desktop. Calibre is the most practical tool for this task. It can import comic archives and convert them to Kindle-compatible formats.
3. Add the comic to Calibre. In Calibre, choose Add books and select the .cbz file.
4. Start the conversion. Select the imported title, then choose Convert books. Set the output format to MOBI.
5. Review image settings. For comics, check options such as page size, margins, image scaling, and cover handling. These settings can strongly affect readability on Kindle devices.
6. Save and transfer the file. After conversion, save the generated .mobi file and copy it to your e-reader or reading app.

If you prefer not to install software, you can also convert the file on 101convert.com for free.

Quality and compatibility notes

CBZ to MOBI is not an ideal format match. CBZ preserves comics as page images, while MOBI is optimized for reflowable text. As a result, the converted file may have larger file size, slower page rendering, and weaker image handling than the original CBZ.

Also note that Amazon has largely moved away from MOBI for newer Kindle workflows, and support can be limited depending on the device or app. In many cases, AZW3 or KFX is a better Kindle-targeted choice, while some comic readers can open CBZ directly.

If your goal is to read comics on a Kindle device, the best result often comes from keeping the pages as images and choosing a format that preserves them well. If you still need MOBI for compatibility, expect some variation in page order, image compression, and cover display depending on the conversion tool.