Convert MOBI to ePub
Convert a Kindle MOBI or AZW3 eBook to ePub, readable on any device except Kindle itself. No signup. Runs on our server; files are deleted automatically within about two hours.
Drop your files here
.mobi, .azw, .azw3 · up to 200 MB · up to 30 jobs an hour · uploaded to our server and deleted after processing; the result is wiped within about two hours
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How to convert MOBI to ePub
- 1
Upload your MOBI file
.mobi, .azw and .azw3 all accepted. DRM-protected files are rejected outright.
- 2
Set the title if needed
Leave it blank to keep the metadata already in the file.
- 3
Download the ePub file
Chapters, table of contents and cover carry over from the original.
The reverse of ePub-to-MOBI, same engine
This is the mirror operation of ePub to MOBI, built on the same Calibre engine and the same DRM check. Structure carries over without reconstruction in both directions, because MOBI and ePub both store flowing, marked-up text rather than the fixed-position character coordinates a PDF uses, so chapters, headings and the table of contents map across directly instead of being guessed at.
Why this conversion is needed at all
Everything reads ePub except Kindle itself, which is exactly backwards from what most people expect. A MOBI file exported from an old Kindle library, or an AZW3 book bought without DRM, opens on a phone, tablet or any other e-reader app only after this conversion, and this tool exists for that gap.
Choosing ePub 2 versus ePub 3
ePub 3, the current standard, is the right default. ePub 2 trades some ePub 3 capability, such as font obfuscation and certain CSS properties, for compatibility with genuinely old reading software that never implemented ePub 3 at all. Pick it only if you know the destination app or device specifically needs it.
Processed on our server, deleted automatically
Parsing MOBI's proprietary PalmDOC compression and building a valid ePub 3 file needs a real conversion engine, so the file is processed on PulsarKit's server. The uploaded file is deleted as soon as the job finishes. The result stays downloadable for one hour and is wiped from the server within about two hours, whether or not you download it.
Frequently asked questions
Can I convert books I bought on Amazon?
Only if they are not protected by DRM. If they are, conversion is not possible and no workaround is offered, the same policy applied to every DRM-protected file across the site.
What's the difference between ePub 2 and ePub 3 here?
ePub 3 is the current standard and the right default. ePub 2 sacrifices a few ePub 3 features for compatibility with very old reading software that never added ePub 3 support.
Will the cover image survive?
Yes by default. Turn “keep cover” off if you specifically want it removed from the result.
Does this support AZW3?
Yes. .mobi, .azw and .azw3 are all accepted, with the same DRM check applied to each.
How long does the file stay on the server?
The uploaded file is deleted as soon as the job finishes. The converted ePub stays downloadable for one hour and is wiped from the server within about two hours, whether or not you download it.
Why does this need a server instead of running in my browser?
MOBI's PalmDOC text compression and internal index structures are proprietary enough that no independent WebAssembly implementation exists; only Calibre reliably reads and writes them.
Guides
Related tools
ePub to MOBITurn an ePub into a MOBI file to copy onto a Kindle by USB cable. No signup; runs on our server, and files are deleted within about two hours.
PDF to ePubTurn a PDF into a reflowable ePub 3 e-book for e-readers. Best on text-based, single-column PDFs. No signup. Runs on our server; files are deleted automatically within about two hours.EPUB to PDFTurn a reflowable EPUB e-book into a print-ready PDF with a fixed page size, chapters carried over as bookmarks and images intact. Runs on our server; files are deleted automatically within about two hours.