What is the difference between CBZ and EPUB for comics?

CBZ is a ZIP archive of sequential image files — simple, widely supported by comic apps, but no metadata or text. EPUB (fixed-layout) has rich metadata, accessibility options, and is accepted by major e-book stores (KDP, Kobo, Apple Books). CBZ is better for personal reading; EPUB is needed for store distribution.

How do I convert CBZ to EPUB?

Use Calibre: ebook-convert comic.cbz comic.epub --output-profile tablet. For manga specifically, KCC (Kindle Comic Converter) is the best tool — it optimises images for device profiles, handles right-to-left manga page order, and supports Kindle, Kobo, and tablet output profiles.

Can I read CBZ files on a Kindle or Kobo?

Kindle does not support CBZ natively. Kobo supports CBZ on some models (check your model's specifications). For reliable reading on both devices, convert CBZ to fixed-layout EPUB using Calibre or KCC. Most dedicated comic reader apps (Panels on iOS, Chunky Reader, Moon+ Reader) support CBZ directly.

What is KCC (Kindle Comic Converter)?

KCC is a free open-source tool for converting comic image collections (CBZ, folder of images, PDF) to optimised e-reader formats. It profiles output for specific devices (Kindle Paperwhite, Kobo Libra, tablet), handles manga right-to-left mode, auto-splits double-page spreads for single-screen devices, and produces fixed-layout EPUB or AZW3.

How do I handle right-to-left manga in EPUB?

Set page-progression-direction='rtl' on the spine element in content.opf. For two-page spreads, use rendition:page-spread-right on the first page (the right page in RTL) and rendition:page-spread-left on the second. KCC handles all of this automatically when you enable manga mode.

EPUB vs CBZ/CBR for Comics: Which Format Is Better?

June 12, 2026 · 6 min read

Comics and manga exist in two main digital formats: EPUB (with fixed-layout) and the CBZ/CBR archive formats. Each has strengths. Here's how they compare and how to convert between them.

CBZ and CBR Explained

CBZ is a ZIP archive containing sequential image files (JPEG or PNG, named in order). CBR is the same concept using RAR compression. Most modern comic readers use CBZ — CBR requires RAR support which is less universally available.

comic.cbz (ZIP archive)
├── 001.jpg
├── 002.jpg
├── 003.jpg
└── ...

# CBZ is literally just a renamed .zip
unzip comic.cbz -d comic_pages/

Format Comparison

Feature	EPUB (Fixed-Layout)	CBZ/CBR
Metadata (title, author, series)	Rich (OPF Dublin Core)	None (filename only) / ComicInfo.xml
Text accessibility	Possible with overlay text	No (images only)
Two-page spreads	Yes (rendition:spread)	Yes (reader-dependent)
Reader support	Apple Books, Kindle, Kobo	Dedicated comic apps (Comixology, Panels, Chunky)
File size	Similar (ZIP-based)	Similar (ZIP-based)
Page order control	Via spine	Alphabetical/numerical filename sort
DRM	ADE, Kindle DRM	Typically DRM-free
Distribution (KDP, Kobo, Apple)	Yes	No — not accepted by major stores

Converting CBZ to EPUB

To distribute a comic through major e-book stores, convert CBZ to fixed-layout EPUB:

# Using Calibre
ebook-convert comic.cbz comic.epub   --output-profile tablet   --comic-image-size 1200x1600

# Using KCC (Kindle Comic Converter) — also creates CBZ and AZW3
kcc-c2e comic.cbz -o output/ --profile KPW5 --manga-style

KCC (Kindle Comic Converter) is the most popular tool for manga/comic conversion — it optimises images for specific device profiles (Kindle, Kobo, tablet) and handles right-to-left manga page order correctly.

Converting EPUB to CBZ

# Extract EPUB images and repack as CBZ
unzip book.epub -d extracted/
# Find all images
find extracted/ -name "*.jpg" -o -name "*.png" | sort |   zip comic.cbz -@

This is useful if you want to read an EPUB in a comic-specific app that only accepts CBZ. Note that text layers, metadata, and styling are lost in this conversion.

Manga-Specific Considerations

Page direction — Japanese manga reads right-to-left. Set page-progression-direction="rtl" in the EPUB spine, or in CBZ ensure filenames sort to the correct right-to-left order.
Double-page spreads — in EPUB use rendition:page-spread-left/right properties. In CBZ, readers typically detect spreads by aspect ratio.
Image quality — for e-ink devices, grayscale JPEG at quality 85 gives better results than color. KCC handles this conversion automatically.

Which Format Should You Use?

Use EPUB if: distributing through KDP, Apple Books, Kobo Writing Life, or any major store. Metadata and accessibility matter.
Use CBZ if: personal collection, sharing in comic-reading communities, or distributing through dedicated comic platforms like ComiXology Submit.
Keep both: create CBZ for personal reading and EPUB for store distribution from the same source images.

Convert PDF to EPUB for e-reader distribution →