CBZ to Zim Converter
FileFlip converts CBZ to Zim entirely inside your browser, using MuPDF and Pandoc compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a CBZ file to Zim?#
- Drop your CBZ file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to Zim and the conversion starts on its own. FileFlip downloads 65.8 MB of WebAssembly the first time and nothing after that, then runs MuPDF and Pandoc on your own machine.
- Save the Zim file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting CBZ to Zim lose quality?#
Not in the sense of pixels or samples. Converting CBZ to Zim rebuilds the file in Zim's own model rather than re-encoding it, so everything Zim can represent comes through exactly and anything it cannot has to be dropped. Expect the words to come through exactly and the page breaks to move.
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 CBZ to Zim actually does to the file#
Converting CBZ to Zim runs on MuPDF and Pandoc, downloads 65.8 MB of WebAssembly the first time and nothing after that, rebuilds the file in the target's own model, keeps selectable text, and drops page layout.
| Engine | MuPDF and Pandoc |
|---|---|
| Conversion path | 2 steps: CBZ → HTML → Zim |
| Downloaded to your browser | 65.8 MB, once, then cached by your browser |
| Quality | Rebuilt in the target's model |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Selectable text | Kept | Carried through into the converted file. |
| Page layout | Dropped | The target format has nowhere to put it. |
Worth knowing before you start:
- the file passes through HTML on the way, so anything HTML cannot express does not survive
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.
What is a Zim file?#
A Zim file holds a page from Zim, a desktop wiki application that keeps a personal note collection as plain text files marked up with Zim's own lightweight wiki syntax.
Keep notes in Zim markup while they're edited inside the Zim desktop wiki, where the plain text files stay easy to back up and version.
Convert Zim pages to Markdown when notes need to move to a different note-taking app or get published somewhere Zim's syntax won't render.
CBZ to Zim 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.
What is a .zim file?
A .zim file holds a page's worth of Zim's wiki markup, the syntax the Zim desktop wiki uses for notes. Zim itself actually saves each page as a plain .txt file inside a notebook folder, so a .zim file is what you get once that page has been exported or converted rather than opened straight from a Zim notebook.