.cbz

File format · Released 2003 · By Comic book community (informal)

About CBZ Files

Comic Book Archive (ZIP)

CBZ is a ZIP archive containing sequential comic book page images.

Family

eBooks

Extension

.cbz

MIME Type

application/vnd.comicbook+zip

Can Use As

Input Output

● Hex Magic-Bytes Signature (Offset 0x00) eBooks Binary/Text Stream

43 42 5A 46 00 01 00 00 4B 41 49 4A ASCII: CBZF....KAIJ

Convert CBZ → HTMLZ → 14+ CONVERSIONS ↓

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Lossless JPEG Q100 + standard COM segment padding for government & exam portals

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The story

HOW CBZ CAME TO BE.

2002

2003

CBZ — Comic Book ZIP — is a file-naming convention more than a format. It’s simply a ZIP archive containing image files (usually JPEGs or PNGs of comic book pages) numbered in reading order, renamed with the .cbz extension so comic readers can auto-detect them. The convention emerged around 2002-2003 in online comic-scanlation communities.

The comic-reader ecosystem built on top: ComicRack (Windows), CDisplay (the original, 2003), Comic Shelf (iOS), SimpleComic (macOS), and every e-reader’s comic mode. A .cbz is effectively the EPUB of comics: pages in order, no DRM, works everywhere. The sibling .cbr format uses RAR instead of ZIP; .cb7 uses 7z; .cbt uses TAR. All four share the same internal structure (numbered images) and can be renamed interchangeably once extracted.

ISO / MIME SPECS

Technical Specifications

MIME type: application/vnd.comicbook+zip
Extension: .cbz
Container: ZIP
Siblings: .cbr (RAR), .cb7 (7z), .cbt (TAR)
Optional metadata: ComicInfo.xml

Typical Sizes & Weights

Single comic issue (24-32 pages)

20-80 MB

Manga volume (200 pages)

80-250 MB

Full story arc (multi-issue)

200 MB - 1 GB

STRENGTHS & LIMITATIONS.

Strengths

Trivially simple — a ZIP of ordered images.
Universal comic reader support since 2003.
No DRM — archive-friendly, portable across devices.
Small files thanks to JPEG/PNG compression of each page.
Works on Kindle, Kobo, phones, tablets, desktops.

Limitations

No standardized metadata (ComicInfo.xml is a convention, not required).
Quality depends entirely on the source images.
Relies on alphabetical filename order — inconsistent naming breaks reading order.
No interactive features (unlike animated comics on Comixology Guided View).

CURIOSITIES & TRIVIA.

A .cbz is just a ZIP — rename one to .zip and you can browse the JPEG or PNG pages directly.

CDisplay (2003) was the first dedicated comic reader — its author Elysium named the format convention that stuck.

Kindle supports CBZ on its Paperwhite and Scribe bodies — comics look sharp on E-Ink.

.cbr (RAR) and .cbz (ZIP) are functionally identical — the extension just tells your reader which decompressor to use.

DC Comics and Marvel distribute their official digital comics as proprietary formats — but fan-scanned archives live in CBZ.

STUDIO TOOLS FOR CBZ

Specialized Utilities for .CBZ Files

View all 45 tools →

merge →

Merge PDF

Combine multiple PDF files into a single document. Drag and drop to reorder pages before merging. No software installation required.

split →

Split PDF

Split a PDF into separate files by page ranges or extract individual pages. Perfect for isolating chapters, invoices, or specific sections.

compress →

Compress PDF

Reduce PDF file size without visible quality loss. Choose from low, medium, or high compression levels. Ideal for email attachments and web uploads.

convert →

PDF to Word Converter

Convert PDF documents into editable Microsoft Word (DOCX) files online for free while preserving layout, tables, and typography.

convert →

Word to PDF Converter

Convert Microsoft Word documents (DOCX, DOC) into print-ready PDF files with exact font embedding and layout preservation.

convert →

PDF to Excel Converter

Extract tables, financial rows, and structured columns from PDF files directly into editable Microsoft Excel (XLSX) spreadsheets.

ocr →

Make PDF Searchable (OCR)

Add a searchable text layer to scanned PDF documents using OCR. The visual appearance stays the same but you can now search, select, and copy text.

decrypt →

Unlock PDF

Remove owner printing/copying restrictions and decrypt password-protected PDF files instantaneously once you enter the known password.

CONVERT FROM CBZ

cbz pdf cbz docx cbz odt cbz txt cbz md cbz html cbz epub cbz mobi cbz azw3 cbz fb2 cbz rst cbz htmlz cbz txtz cbz pdb

Common Use Cases

Digital comics, manga