CBZ to EPUB Converter
Turn a CBZ comic archive into an EPUB e-book for comfortable reading on any device.
Complete the security check to begin
About Converting CBZ to EPUB
A CBZ is the open, ZIP-based comic archive — your comic’s pages stored as sequential images that comic readers display in order. It is simple and widely supported among comic apps, but it does not behave like a normal e-book: it will not appear in your e-reader’s library, it has no cover shelf entry, and generic reading apps often cannot open it. Converting to EPUB turns the archive into a standard e-book that lives alongside your other titles in Apple Books, Google Play Books, Kobo and most mobile readers.
PrivConvert reads the ZIP-based CBZ natively, validates each page against decompression-bomb and unsafe-path protections, and assembles an image-based EPUB that keeps your original page order and full resolution. The entire process runs in server memory and your file is wiped the moment the EPUB is ready — nothing is written to disk or retained.
Common use cases
- Getting a comic into an e-reader library that expects EPUB
- Reading a comic in Apple Books, Google Play Books, Kobo or a phone reader app
- Giving a scanned comic a proper cover thumbnail and shelf entry
- Packaging a folder of comic pages as a standard, shareable e-book
- Reading comfortably across phones and tablets that favour EPUB over comic archives
Tips for best results
- The EPUB is image-based and fixed-page, so artwork and lettering are preserved exactly — comics do not reflow the way text e-books do.
- Pages are ordered by their file names inside the ZIP, so sequentially numbered CBZ pages convert in correct reading order.
- Start from the highest-resolution CBZ for the crispest pages on high-density screens.
- Prefer a fixed print layout or want to print? Use CBZ to PDF instead. Files up to 250 MB are supported for both.
How to Convert CBZ to EPUB Online
Converting CBZ to EPUB with PrivConvert takes three quick steps and no software to install. What you gain with EPUB: reflowable text for any screen.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from CBZ to EPUB starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
Why convert CBZ to EPUB with PrivConvert?
PrivConvert turns your CBZ into EPUB without ever storing, logging or sharing it. Here is what that looks like in practice:
We never keep a copy. Once your EPUB is delivered, both the original and the result are gone — there is nothing left to leak or misuse.
Every conversion runs in its own locked-down process with no network access, so files can never leak or interfere with one another.
Your files are handled entirely by automated code. No staff, partner or AI model ever reads, stores or trains on your data.
Files are processed in volatile memory (RAM) and purged the instant your download is ready — nothing is ever written to disk, cached or backed up.
CBZ vs EPUB - Format Comparison
| Feature | CBZ | EPUB |
|---|---|---|
| File extension | .cbz | .epub |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Built for people who value their privacy
From one-off files to daily batches, thousands of people rely on PrivConvert precisely because it keeps nothing once the job is done.