Step 1: Supply your EPUB files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted CBZ files.
EPUB to CBZ Conversion FAQ
What does the EPUB to CBZ converter do?
+
It converts a EPUB file into CBZ format.
Will the data inside my EPUB be preserved when converting to CBZ?
+
Yes — the content is mapped to the CBZ equivalent. Format-specific extras that CBZ does not represent natively are omitted rather than corrupted.
Is the EPUB to CBZ conversion reversible?
+
You can convert the CBZ back to EPUB on this site. If either format involved is lossy, the round-trip is not bit-perfect even though it is visually or audibly close.
What output quality should I expect from EPUB to CBZ?
+
Default settings target broadcast / web quality — visually identical to the source for most viewers. For archival use, pick the highest quality option in the converter settings.
Will the text still reflow to my screen after converting EPUB to CBZ?
+
No — this conversion pins the layout. An EPUB adapts its line breaks to whatever width and font size the reader is using; the CBZ fixes page geometry at conversion time, so on a phone you get the whole page scaled down rather than text rewrapped to the screen. That is the right trade when the layout must not move, and the wrong one when the file is for reading on a small device. EPUB reflows text to any screen size and any font size, which is what makes it readable on a phone as well as an e-reader. CBZ is a Comic Book ZIP — the same idea as CBR but built on the open ZIP format instead of RAR.
Will the converted book keep its cover, chapters and table of contents?
+
Yes where both formats can express them. Cover art, chapter divisions and a navigable table of contents are structural metadata, so they carry across rather than being flattened into the text. Footnotes and index entries are the fragile parts — they degrade into inline text on targets with no anchor mechanism.
Why does my EPUB file refuse to convert?
+
DRM, in almost every case. A protected EPUB is encrypted and tied to an account, and no converter can decrypt it — ours included. Files you created yourself, or bought from a DRM-free store, convert without any trouble at all. EPUB has no fixed pagination, so page numbers are meaningless, and complex layout — tables, equations, multi-column — degrades badly.
How are the comic pages ordered in the output?
+
By filename, which is how every comic archive works — the pages are images in an archive and the reader sorts them lexically. Zero padding therefore matters: page10 sorts before page2 unless the numbers are padded out. The converter preserves the source ordering rather than re-sorting it.
Is there a file-size limit when converting EPUB to CBZ?
+
Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several EPUB files to CBZ at once?
+
Yes. Drop or pick multiple EPUB files in one upload — the converter processes them in parallel and returns a ZIP of the CBZ results. There is no need to repeat the upload step per file.
What happens to my EPUB files after the conversion?
+
Uploaded files and CBZ outputs are auto-deleted after a short retention window. We do not inspect, share, or train on user files. Direct download links are time-limited and tied to your session.
Where can I open my CBZ file?
+
CBZ opens in the standard tools for its category. Browsers and built-in OS viewers handle the common cases.
