A MOBI file can contain two formats inside of it: the old MOBI format, and the newer MOBI KF8.
Most illustrated books require the newer formatting options available in the KF8 format, to ensure the book looks just as pretty on a reader’s Kindle as it looks on your monitor when you are creating it. You want to check the KF8 box when you upload your illustrated books to BookFunnel so that MOST of your Kindle readers will see your images correctly. One important exception: Kindle For iOS.
Kindle For iOS MIGHT NOT display your illustrated book correctly because it WILL NOT open the newer MOBI format. It will only display the older mobi format.
This is a limitation in the Kindle For iOS app when books are sideloaded (meaning, distributed outside of their Kindle Store) and Amazon hasn’t fixed it. Because the Kindle For iOS app won’t show your KF8, an illustrated book might appear blank in the Kindle For iOS app if the formatting in the old MOBI format inside the book is busted. You can test your MOBI if you have an iOS device by emailing yourself the book and attempting to open it in your Kindle For iOS app.
What to do if Your Illustrated Book is Busted
If you check your MOBI in the Kindle For iOS app and it is busted, don’t panic. 🙂
- Upload your own EPUB, MOBI. Do not rely on our compiler to create a EPUB or MOBI if your book is illustrated. Our compiler can’t process fixed layout/ illustrated books.
- Include the KF8 when you save your book to BookFunnel. Learn how here.
- Always upload a PDF. They are designed for fixed layouts and will display your images perfecly on every device