You can upload to Kindle in several file formats including Mobi, EPub and plain text but the most relevant ones here are HTML and Word’s .doc/.docx. If you have a very simple, purely text-based book, you may get away with just hitting Save and uploading your Word file.
However, the official Kindle guide recommends HTML. I strongly suggest you follow this advice, particularly if you have images in your book. This includes the transparent GIFs you used to position chapter headings. In my experience, these, along with a whole host of other formatting instructions, survive conversion much better when you upload your eBook using HTML.
Before you convert to HTML, make sure you save any changes to your Word document. You need this fully up-to-date. If you want to make changes to your eBook later, you’ll return to this original document, make the alterations and then convert it to HTML again. You don’t make changes to the HTML file.
Once you’ve saved your work, click File (or the Office button in Word 2007) and select Save As. Some versions of Word take you directly to the Save As pop-up box, while others ask you to confirm whereabouts on your computer you want to save the file first. Either way, once you reach the pop-up box, select Web Page, Filtered from the Save as type drop-down menu:
N.B. on a Mac, select Webpage (.htm).
Then, click Save.
A warning will flash up on the screen about losing Office specific tags when converting to HTML. Ignore this and click Yes, indicating you wish to continue.
If you don’t have any images in your eBook, then all you need to do is locate the html document on your computer and upload it as you would a Word one. Its exact appearance will vary depending on your default web browser but it should look something like this:
However, if you have images in your eBook, even if they’re only transparent GIFs used for positioning chapter headings, you’ll have two files: the HTML one (as above) and a folder of files containing your pictures:
In this case, you need to compress all your documents together for upload. To do this, right click on the HTML one:
Select Send to -> Compressed (zipped) folder:
A new folder will appear. It looks like a normal folder but with a zip down it. Currently, it only contains the text of your eBook, not the images. To rectify this, drag your My eBook files folder into it:
Open the zipped folder to check it contains both the HTML document and the image files.
This zipped folder is the one you’ll upload to Kindle.
Congratulations, your eBook is now ready for upload to KDP.
If you also intend to sell through Smashwords, click here to find out what changes you’ll need to make