ZIP to EPUB
Here is the secret nobody selling you a "ZIP to EPUB converter" mentions: if your ZIP is full of page images, it already is a comic archive. A CBZ is nothing more than a ZIP with a different extension. So you do not need to rename anything, repack anything, or hunt for a special tool: drop the ZIP straight in and it is read exactly like the comic it is.
What you do need is the step that actually matters: turning that folder of loose scans into a proper EPUB, with pages in the right order, resized for a real e-reader screen, and wrapped so the file opens as a book with page turns instead of an image gallery. That is the part this converter does, with a live preview before you commit.
ZIP to EPUB
Free, no renaming, live preview
How it works
Drop the ZIP in, as-is
No renaming to .cbz first. The archive is unpacked in your browser and its images are read in order. Up to 20 files at once, 1GB each, up to 1000 pages per file.
Pick a target device or plain EPUB
Choose your Kindle, Kobo or reMarkable model to get pages sized for that exact screen, or keep a generic EPUB if you read on many devices.
Preview the result
Converted pages render live before you download. Check that page 2 follows page 1 and that lettering is readable, then adjust splitting or borders if needed.
Download your EPUB
The finished EPUB works with Send to Kindle (which accepts EPUB, unlike MOBI), Kobo, and most reading apps. Outputs auto-delete after 24 hours.
ZIP, CBZ: same file, two names
The comic world adopted .cbz ("comic book zip") purely as a labeling convention so reader apps could claim the files. The bytes are identical to a ZIP. Any tool that insists you convert ZIP to CBZ first is charging you a step that does not exist.
Everything happens in your browser
The ZIP is unpacked in the browser, you preview the processed pages before converting, and finished files auto-delete after 24 hours. The engine is open source and self-hostable (kcc-cloud on GitHub) if you would rather run your own.
Frequently asked questions
Do I have to rename my ZIP to CBZ first?
No. That rename changes nothing about the file, and this converter does not require it. A ZIP of page images is accepted directly and treated as a comic archive.
What should be inside the ZIP for this to work?
Page images, one image per page, named so they sort in reading order (001, 002, and so on). That is the same layout every CBZ uses, which is why the ZIP works without changes.
Will the EPUB be a real book or just images stuffed in a file?
A real fixed-layout EPUB: pages resized for your chosen screen, contrast tuned for e-ink, and proper page turns. That is the difference between converting and merely re-zipping.
My scans are manga. Can the EPUB read right to left?
Yes. Enable manga mode and right-to-left reading is stamped into the output, so your e-reader turns pages in the correct direction automatically.
Conversion runs on Kindle Comic Converter (KCC), the open-source engine the comic community has used for years to build device-perfect EPUBs, hosted here so there is nothing to install.