EPUB to Kindle
First, the honest answer: for a normal novel you may not need a converter at all. Amazon's Send to Kindle accepts EPUB directly and has since it dropped MOBI in 2022, so if your EPUB is an ordinary text book, just upload it there and you are done.
Where that stops working is exactly where this converter starts: comic and manga EPUBs whose fixed-layout pages render badly after Amazon's automatic conversion, files over the roughly 50MB Send to Kindle limit that get rejected outright, and books whose page images were never sized for a Kindle screen. MangaConverter rebuilds those page by page for your exact model, Kindle 11 at 1072 x 1448 or any other, with a live preview before you commit.
EPUB to Kindle
Free, live preview, made for comic and manga EPUBs
How it works
Drop your EPUB in
EPUB is a supported input alongside CBZ, CBR and PDF. Files up to 1GB and 1000 pages each, twenty at a time, processed starting right in the browser.
Choose your Kindle model
The device profile sets the true screen resolution, so each page image is rebuilt to fit that panel exactly instead of relying on on-device scaling.
Compare in the live preview
See the rebuilt pages before converting. If your original EPUB rendered with cramped panels or washed-out art, the difference is visible here immediately.
Convert and deliver
If the output is under about 50MB, Send to Kindle works; anything larger goes over USB, which has no limit. Converted files auto-delete after 24 hours.
Why comic EPUBs go wrong on Kindle
A comic EPUB is a stack of fixed-layout page images, and Amazon's automatic ingestion is tuned for reflowable text. Panels get letterboxed, greyscale goes muddy, spreads break. Rebuilding pages at the Kindle native resolution sidesteps that conversion entirely.
The 50MB line
Send to Kindle rejects files over roughly 50MB, and image-heavy books cross it easily. Resizing pages from print resolution down to the actual screen (1072 x 1448 on a Kindle 11) often lands the file back under the limit with zero visible loss on the device.
Frequently asked questions
Send to Kindle takes EPUB now, so why convert at all?
For plain text books, do not: upload them directly. Convert when the EPUB is a comic or manga (Amazon's automatic conversion handles fixed-layout image pages poorly), when the file is over the roughly 50MB upload limit, or when pages were built for a different screen.
My EPUB was rejected by Send to Kindle for its size. What now?
Two options: converting here often shrinks image-heavy EPUBs below the limit by resizing pages to the actual Kindle resolution, and if it is still large, USB transfer accepts any size.
Do I still need MOBI for anything?
Only for old Kindles loaded over USB. Send to Kindle stopped accepting MOBI in 2022, so for everything current the answer is a properly built EPUB; MOBI stays available as an output for the legacy case.
Can I turn an EPUB back into a comic archive?
Yes, CBZ is one of the available outputs, which is handy if you want to re-read a comic EPUB in a dedicated comic app or archive it in the standard format.
The rebuild runs on Kindle Comic Converter (KCC), the open-source engine trusted for years for exactly this fixed-layout work, hosted in the cloud with a live preview so nothing needs installing.