azw3 in 2011 added support of some HTML5 and CSS3 features azw, launched in 2007, is a proprietary format developed by Amazon to integrate richly formatted e-book features its update. mobi, created in 2000 and progressively abandoned since 2011, is now obsolete and should really not be used today: the display of books is very poor, with a catastrophic text justification, no ligature, kerning or hyphen Since the launch of the first Kindle, several successive ebook formats have been used by Amazon for its Kindle: Import metadata and high quality covers from the Kindle store ĭisplay the covers when the kindle is turned off with the right ratio.Ĭonverting ebooks to the KFX format Why using the KFX format? Use the KFX format to get well formatted books with justification, hyphens, kerning and ligatures While everything works “out of the box”, over time I have discovered a number of tricks that allow me to have books that are as well formatted as those in the official store, a tidy library, and good quality covers.
If the reader itself is of excellent quality, the counterpart is its very closed ecosystem, turned around the Amazon store and a proprietary format with DRM.įortunately, the fantastic Calibre software allows you to use your Kindle with your own library of books and take full advantage of your e-reader. I recently had the opportunity to play for a few days with an Amazon Kindle Paperwhite (2021). I am a bit of a control freak and like to have my library organized and looking pristine.Sideload books to a Kindle with Calibre – Sylvain Durand sylvain durand Sideload books to a Kindle with Calibre I have some epubs that I converted to azw3 to read on my Kindle. Took my sweet time to make the conversion perfect. Adjusted line height, paragraph spacing and indentation, headings, etc. Then, last but not least, added the covers. I like to choose the best looking cover designs, and I get the highest quality possible (within reason not some 5000px 300dpi monster). When loading my books to the Kindle (via USB, using the "send to device" option on Calibre), some books display their cover, while others don't. I read in many topics that you can just unplug and plug the Kindle again, and Calibre will load the covers for you. And some of the books that do show cover don't even have the asin number. Deleted the book from the Kindle and reloaded them. Lowered the dpi of some covers from 96dpi to 72dpi. BTW, I thought about lowering the resolution of the cover, but some of the books that do display cover on Kindle have high resolution cover on Calibre. Made sure "sharing content via Facebook" option was disabled. Some people said that when you convert the book, Calibre already makes the cover ready for Kindle by default. I added the covers after the conversion (stupid). But I didn't want to convert again, because I don't want to risk losing all the work I put into the layout. It fixed the cover, but it screwed the layout. Is there a way to fix it without converting the books again? I have noticed that Calibre added the covers of the working titles on a folder on my Kindle (amazon-cover-bug). But on Calibre they were higher resolution, and Calibre handled the image rescaling during sideload.Īll the covers there are low resolution (max of 500px). I am Using Calibre 5.22.1 and the Kindle Paperwhite 3 with latest software. I'm having similar/related missing cover issues with multiple. Used Calibre Win 圆4 (calibre-64bit-5.36.0.msi) to send unmodified. Mobi's to the Kindle (PPW 2018).Ĭovers initially appear on the Kindle, and a few seconds later are replaced with generic blank covers.