Convert a CBR comic to CBZ
Convert a CBR file (comic in RAR) to CBZ (comic in ZIP), directly in your browser.
Processed on your device via WebAssembly. Nothing is sent to any server.
or click to select it
Extracts the CBR's content with the RAR engine and re-packs it into a ZIP (.cbz), preserving the content as-is -- no image recompression and no lost files.
Use cases
- Convert your CBR comic collection to CBZ, a simpler and more widely supported format.
- Prepare a comic for a reader that only supports CBZ.
How it works
- 1
Upload your CBR
Drag the file or choose it from your device.
- 2
Convert to CBZ
Click the button to generate the file.
- 3
Download the file
The .cbz downloads automatically.
Technical details
- It extracts the RAR with UnRAR (WebAssembly) and repacks its contents—images, ComicInfo.xml and the folder structure—into a ZIP with the .cbz extension.
- The images don't lose quality: the ZIP only packs them, without re-encoding. Page order is kept because file names don't change.
- CBZ is the most compatible comic format: almost every reader opens it without relying on UnRAR. The resulting CBZ has no password even if the CBR did.
- Split RARs are not supported. Limits: 50 MB of input, 2,000 entries and 300 MB uncompressed.
Frequently asked questions
Is quality lost in the conversion?
No, the images are kept as-is; only the container format changes (from RAR to ZIP).
Does it work with password-protected CBR files?
Not in this first version; only unencrypted CBR files are supported.
Related guide: Document and archive formats: which one to choose and what each one keeps