Thank you for answering my question about download fees!
Can someone please answer my question about image file size limit?
The documentation on the site says 127KB limit on image files, but an answer that I just received after waiting over 24 hours says "Further, you may upload content with images with high resolution and successfully publish the same on the KDP web site. We do not have size specifications for images within the content of your title."
While the official Kindle Publishing Guidelines specify a maximum internal size of 127kb, this is neither strictly true nor does it make much sense. When your book is converted to Kindle using one of Amazon's processes (KindleGen, Kindle Previewer, or the KDP website) images will be automatically resampled and/or recompressed as necessary to meet the requirements for publication. In my testing most images will end up in the neighborhood of 128kb, with the largest appearing to be around 160-170kb. This limit is apparently quite a bit higher than 128kb for fixed-layout books, but I have not done extensive enough testing myself to tell you how large that practical limit is, nor whether the 800kb figure given in the Publishing Guidelines is at all accurate.
I would suggest including your images at a reasonable final resolution in JPEG format, saved at the highest quality possible. After the book has been converted give it a thorough review on as many Kindle readers as possible to see if the results are satisfactory. You will likely find that they are, but if they are not you can then investigate strategies for manually optimizing them further.
Above all, test, test, test, and test some more. This will always be the best way to be sure. Kindle Previewer is very handy for this testing as it can convert your content from HTML to a compiled Kindle eBook and give you an immediate preview of the results.
Thank you very much! This makes much more sense. I'm going to keep my images at 100dpi, but there's no way I'm going to come close to the 800KB restriction. I'll report back what happens.
Why does kindle have such terrible technical support? Are they selling conversion services, like createspace does? And even if they are selling services, they should offer technical support. createspace offers excellent support, you can even speak with someone on the phone, 24/7.
If kindle isn't selling conversion services, their company blueprint is flawed. I suppose they don't care because they're making lots o' money with the flawed plan.
My book was about 30 MB before I uploaded it to Kindle. However, somewhere in the file conversion process, the total file size was reduced to 1.9 MB.
I think the limitation of 50 MB is for your original, unprocessed word doc, or whatever format you use. Actual Kindle book size will be much less, and they will inform you of how big your converted file is.