Beginning in late 2022, you’ll no longer be able to send MOBI (.AZW, .MOBI) files to your Kindle library using Send to Kindle, including the Send to Kindle email address, Send to Kindle desktop app and Kindle app for iOS and Android. According to Amazon, this is because MOBI is an older file format and won’t support the newest Kindle features for documents. And this change won’t affect any MOBI files already in your Kindle library. You can still read them with Kindle. Meanwhile you will be able to send EPUB (.EPUB) documents to your Kindle library from the Kindle mobile app and the desktop app late this year.
In this post, we will learn how to convert the MOBI (.AZW, .MOBI) files to EPUB format so you can send your books to your Kindle Library and device through the Send to Kindle service.
Download and install Calibre on your computer before we continue the mobi books conversion. If you are a Windows user, you can refer to this guide to download and install Calibre.
Convert MOBI (.AZW, .MOBI) files to EPUB on Windows PC
If you use Calibre on a Windows PC, you will open the calibre library on its home screen like this.
All books titles will be listed on its home screen. Click to choose a book to edit, convert, view or send it to your book readers. If the mobi or azw, azw3 book files have not been added to the book manager software, you can click Add books button from the top toolbar, then find and import them. You can simply drag and drop the mobi books from File Explorer to the converter.
To convert a book using Calibre, click the Convert books button from the top toolbar.
Then choose EPUB from the Output format box at the top right corner. Optionally you can change book title, author, publisher, tags, series and other information or metadata of the book. Finally hit the OK button to convert the book from .mobi, .azw or azw3 to .epub format.
Find books in calibre library
The new book file will be saved to the Calibre Library on your computer. We have discussed the default calibre library location /folder and how you can change it in the calibre download and installation guide above. You can scroll up and open the page for more details. Other than open the library from Windows File Explorer or Mac Finder, you can also quickly access calibre library from the program. Click any book on your Calibre library, its detailed information will be display at the right column. Then click “Click to open” link besides the “Path” option. You can easily open your Calibre folder or library in Finder on Mac or File Explorer on Windows PC.
Convert Mobi to Epub on Mac
The conversion of mobi books to epub is almost the same on Mac. Here’s how the home screen and calibre library looks like on Mac.
When you select the .mobi, or .azw book from the Library and hit the Convert books, you will open a new dialog like this.