CBZ Converter
FileFlip converts CBZ files into 61 other formats entirely inside your browser, using MuPDF, Pandoc and ImageMagick compiled to WebAssembly. The CBZ file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. There is no file-size limit and no account to create.
How do I convert a CBZ file?#
- Drop your CBZ file onto the converter at the top of this page, or click it to pick one from your computer.
- Choose the format you want out of it. FileFlip downloads the engine that conversion needs, once, and your browser caches it.
- Conversion starts the moment you pick the format, and the result is yours to download. The work happens in this tab, so nothing is uploaded and nothing is queued.
Is it safe to convert CBZ files online?#
Yes, because nothing is uploaded. FileFlip converts CBZ files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What happens to a CBZ file#
FileFlip converts CBZ into 61 formats with MuPDF, Pandoc and ImageMagick, all of it inside the browser tab. Each conversion below names the engine it uses, what it downloads, and exactly what that conversion keeps or drops.
| Category | Documents |
|---|---|
| File extension | .cbz |
| FileFlip support | Read and written |
| Conversions available | 61 |
| Engines | MuPDF, Pandoc and ImageMagick |
| Downloaded to your browser | 9.9 MB on the first conversion, then cached |
What is a CBZ file?#
A CBZ file is a ZIP archive of page images, usually JPEG or PNG, named so they sort into reading order, with nothing else defining it as a comic beyond that convention.
Use CBZ to distribute a scanned or digital comic as sequential page images that any comic reader opens without conversion.
Convert CBZ to PDF when a comic needs to move into software that expects a page-based document instead of a folder of images.
The CBZ file format reference covers the specification, the programs that open one, and what each conversion keeps or drops.
CBZ questions people ask#
What is a CBZ file?
A CBZ file is a ZIP archive holding a comic's pages as individual image files, named so they sort into the right reading order. There is no page-layout data or text encoding involved, which is the entire format: a comic reader just opens the ZIP and displays the images in sequence.
What's the difference between CBZ and CBR?
CBZ and CBR hold the same kind of content, sequential page images, but CBZ is a renamed ZIP archive while CBR is a renamed RAR archive. Most comic readers open both, but ZIP's open format makes CBZ the more portable of the two.
Can a CBZ file store metadata like the comic's title or issue number?
Yes, many CBZ files include a ComicInfo.xml file inside the archive alongside the page images, which readers like Calibre and CDisplayEx use to show series, issue number and creator credits. It is optional, so a CBZ file without one has no metadata beyond the page images themselves.