You can read this article How can I import my personal documents to my Kindle app on iPad/iPhone to check the reason why it can’t. That’s because AZW3 isn’t one of the eBook formats supported by the Kindle Personal Documents Service. Amazon’s Send-to-Kindle service doesn’t apply, either. We’ve tested and found that AZW3 files cannot be read on Kindle for iOS but can be read on Kindle for Android. However, Kindle for iOS is not an option when it comes to reading AZW3 books on an iOS device. Hence, the DRMed AZW3 books can only be read on Kindle related devices or apps. It’s a chore, but totally doable.It’s universally known that AZW3 is the Amazon proprietary format and all AZW3 books delivered by Amazon have DRM encryption. Restart, if needed, and then just choose a default program to open the specific file type of your choice as you would normally do. You might also find useful File Types Manager and/or Default Programs Editor for a better look of the situation. Make sure you have detached/deleted beforehand all previous traces of ePUB, MOBI, or AZW3 file type definitions and program associations in your system. The basic schema in Windows Registry for ePUB would be something like this (all the action is in HKEY_CLASSES_ROOT): Create Windows Registry EPUB extension Create Windows Registry EPUB file type Basically, if you have problems assigning an icon only for one of those formats, your best bet is to detach this format from the application that opens it, and also, most likely, deleteing that format from Windows Registry and recreating it manually. In some cases, changing the icons in Windows 10 might be tricky. If you think the coast is clear, do whatever you like with the icons. However, if you intend to use these icons for a publicly available or commercial project, make sure to triple check if the original icon/icons on which I’ve approximated mine aren’t, in fact, heavily copyrighted. You are free to use all three as long as it’s for personal use only.

Azw3 to epub