FWIW, Amazon deprecated mobi files recently and epub is the new “sideload” standard. You still have to email the file to the kindle address to be able to read them, or convert to azw3.
If you’re already using Calibre, check out Calibre-Web, which essentially uses a Calibre database as the back end. The interface is so much nicer than Calibre.
tomkatt@lemmy.world 1 year ago
MOBI has been deprecated for a long time. Standard formats now are AZW3 (KF8) and KFX. They’re a bit more advanced than MOBI, and thank goodness, since it was a terrible format. AZW3 is essentially a MOBI/EPUB container, and I believe KFX is equivalent to EPUB2, possibly with some EPUB3 features.