Both directions — the format is auto-detected, and one tap swaps it. No account, no watermark, no upsell mid-download. Convert EPUB for Kindle, or MOBI back to EPUB, without installing Calibre.
50 MB per file · 20 conversions a day · encrypted transfer, and the file is not kept after it comes back to you.
Drop an EPUB or MOBI here
Converts in one click and downloads automatically.
No desktop install, no plugin maze. The same Calibre engine quality, in a browser tab.
Rescue old Kindle-format books into the format every modern reader — including Kindle — now prefers.
No account, no address to hand over, no watermark, and no upsell in the middle of your download.
EPUB works with Send to Kindle; MOBI is for USB sideload — the full story is in the guide.
No — Amazon’s Send to Kindle accepts EPUB and dropped MOBI. Convert to EPUB for wireless delivery; MOBI remains useful only for USB sideload onto older devices.
DRM is encryption applied by the store that sold the book. No legitimate converter can open those files — if yours fails with a DRM error, that’s the file, not the tool.
A Calibre-derived engine does the work: chapters, table of contents, cover and metadata survive the round trip. Complex fixed-layout books are the one known weak spot.
No. Calibre is a desktop application with a plugin ecosystem, which is a lot to install for one conversion. This runs in the browser and needs nothing on your machine.
The book is sent over an encrypted connection to the conversion service, converted, and returned to your browser. No account is required, and we never ask who you are.