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Internally the Kindle Paperwhite still uses MOBI: https://www.theverge.com/2022/5/2/23053408/amazon-epub-kindle-ereader-file-format-kf8 https://www.theverge.com

by hasbot 4y ago

Internally the Kindle Paperwhite still uses MOBI: https://www.theverge.com/2022/5/2/23053408/amazon-epub-kindle-ereader-file-format-kf8 https://www.theverge.com/2022/5/2/23053408/amazon-epub-kindl... When I tried emailing an epub this way, Amazon messed up the conversion. I've had good luck converting pirated epubs to MOBI using an online converter so I haven't changed my practice.

goosedragons 4y ago
No they don't use mobi. Amazon has two formats newer than mobi, AZW3 and KFX. Both support more features. Using mobi is like saving your Word docs as RTF these days.
mft_ 4y ago
This seems to be changing. I have an older Paperwhite; my GF has a newer one. I uploaded MOBIs to both last night (via USB) - it worked on hers, and they didn’t show on mine. I had to convert them to AZW3 and reupload for them to show in the listing. (I’ve not checked, but it’s plausible my older model has more up-to-date firmware.)