.cbz — Comic Book Zip
A comic-book archive that is essentially a ZIP file containing page images in reading order.
About this format
CBZ is simple: it is a ZIP archive with image pages, usually named so readers can sort them in order. The format is popular for comics, manga, scanned books, and visual archives.
Use CBZ when pages are already images. Use EPUB for reflowable text books and PDF when fixed print pages matter.
Real-world samples & file sizes
CBZ samples should be judged in the sizes people actually receive, upload, or export. These reference cards show the common shapes and settings to check before choosing a conversion target.
international page
The default document shape for many countries.
US page
Important for North American documents.
report
Checks navigation, thumbnails, and file size scaling.
image-heavy file
Useful when the format often stores scanned pages.
Reference dimensions are platform-style targets. Compatibility and format facts are verified from the linked online sources below.
Pros
- +Simple and easy to inspect
- +Works well for image-based comics
- +Many reader apps support it
Cons
- −No rich layout model
- −Large if page images are high resolution
- −Metadata support depends on reader conventions
CBZ vs other formats
| vs | Size | Quality | Note |
|---|---|---|---|
| Varies | Image-page workflow | PDF has stronger document semantics; CBZ is simpler for comics. | |
| EPUB | Usually larger for text | Image pages | EPUB is better for reflowable text. |
Where it works
- Reader app required
- Browsers can open the ZIP only with app logic
- YACReader
- Panels
- CDisplayEx
- Calibre
- MComix
Frequently asked questions
- Can I rename CBZ to ZIP?
- Yes, CBZ is a ZIP archive by convention. A reader treats the contained images as pages.
- What image size should CBZ pages use?
- Use enough resolution for the target display, often around tablet or print-page sizes, while watching total file size.
Sources
- Library of Congress - Comic Book Archive - comic archive format family
- Library of Congress file format descriptions - archival format descriptions and sustainability notes