Important Notice: as of midsummer, 2021, this article is outdated. Please refer to our updated article for the latest, greatest, and accurate information. Again, this article contains outdated and not-useful information; refer only for historical purposes.
About eBook Formats
One of the questions that we are often asked is, "what is the best eBook format for Kindle? I'm not always sure what question I'm being asked. Is the person asking to find out what file format they should upload to Amazon? Are they asking what's the best way to make a book for the Amazon-Kindle ecosystem? Really, there are only two eBook formats that are still remaining in the USA, and, when you look around, in the world. Those formats are:
- ePUB: which stands for ePUBlication (clever, eh?), which is used by B&N, iBooks, Sony, KoboBooks, and Google, and,
- MOBI format, which is the preferred Kindle file format.
If you've Googled, you've likely seen all sorts of claims, ranging from some folks telling you that you can put an ePUB on Kindle, to the idea that using Word is the best "Kindle eBook format." The bottom line is, the files that Amazon sells to its readers are, by and large, a single file format, called "MOBI."
What Format Does Kindle Use?
Now, if you've run across various forums, you may have seen people refer to AZW format, or AZW3 format. The former is the actual, final, encrypted Kindle format that is dispensed from the Amazon store, to your Kindle as a purchased book. That's not a format that you can make yourself. And, even if you could, you can't upload that format at the KDP, the Kindle Digital Publishing platform. The latter, AZW3, is a file format, created to emulate what's called "KF8," (the more-advanced Kindle formatting) by a piece of free library software called Calibre. However, just like AZW, you can't upload an AZW3 file format at the KDP. You can certainly make a file in that format, and side-load it to your own Kindle device, but you can't publish it. Obviously, that format, then, lacks utility. Fine for personal use, but useless for publishing. If someone starts yammering away at you, talking about how you can convert your file to AZW or AZW3 format, for the purposes of publishing--that's not someone to whom you should be listening.Add a comment