How to Convert CBR to CBZ for Comics and Manga (2026 Guide)

CBR and CBZ both store the same kind of content (a sequence of image files representing comic pages), but they wrap it differently. CBR uses RAR compression, which is proprietary. CBZ uses ZIP, which is open and built into every operating system. Most modern comic readers prefer CBZ, and several have dropped CBR support entirely. If you have a CBR file that will not open, converting it to CBZ usually fixes the problem instantly.

The conversion is mechanical: extract the images out of the RAR archive, then put them back into a ZIP archive renamed with a .cbz extension. The image files themselves are unchanged, so there is no quality loss.

Watch: Comic format conversion in How to Convert

Here is what comic-format conversion looks like in How to Convert. The whole conversion happens locally on your machine.

Method 1: How to Convert (Easiest, Local, Cross-Platform)

How to Convert handles CBR to CBZ locally with no upload. Drop the CBR in, choose CBZ, click Convert. The original comic stays intact and a new CBZ file appears alongside it.

Steps

• Open How to Convert (desktop or browser).
• Drag your CBR onto the window.
• Pick CBZ as the output format.
• Click Convert. The CBZ saves next to the original.

For an entire collection of CBR files, the desktop app accepts whole folders and converts them in one pass.

Method 2: Calibre (Free, Comic-Aware Library Manager)

Calibre handles comic conversions through its built-in conversion engine. Add the CBR to your library, right-click, choose Convert books, set Output format to CBZ, click OK. Calibre extracts the pages and rebuilds them as a CBZ. Best pick if you already manage your comic library inside Calibre.

Method 3: Command Line (Power Users)

On Mac and Linux, you can convert CBR to CBZ in two commands using unrar (extract) and zip (re-archive):

mkdir comic-pages
unrar x input.cbr comic-pages/
cd comic-pages && zip -r ../output.cbz . && cd ..

For batch conversion, wrap it in a shell loop. unrar is available via Homebrew (brew install unrar) or your distro's package manager.

Frequently Asked Questions

Why is CBZ preferred over CBR?

CBZ uses ZIP compression, which is an open standard built into every operating system. CBR uses RAR, which is proprietary and requires a separate decoder. Most modern comic readers handle CBZ natively but may not handle CBR without an extra plugin.

Will the conversion lose image quality?

No. The image files inside the archive are unchanged; only the wrapping format changes from RAR to ZIP. Page count, page order, and image quality are all preserved.

Can I batch convert many CBR files?

Yes. The How to Convert desktop app accepts a folder of CBR files. The command-line method above works in a shell loop. Calibre supports bulk conversion through its UI but is slower for very large batches.

Final Thoughts

For one-off conversions, our free in-browser CBR to CBZ converter is the fastest path. For batches, the How to Convert desktop app or the command-line method scale to entire collections. Calibre is the right pick when your comics already live inside it.