MobileRead Forums - View Single Post - MOBI support for reflowable files ending on June 28, 2021

jhowell · 12-30-2021, 05:38 PM

Since my name was mentioned three times in the previous post I am bound to respond even though I think this thread is the wrong place to delve into the new question that was asked.

Here is a basic summary of the differences between Kindle formats for reflowable books on current Kindle devices. Some of the restrictions only apply to books you create yourself and either sideload via USB or email.

MOBI: Based on HTML 3. Can be emailed or sideloaded. Will sync annotations and reading position across devices if emailed. Will show a cover thumbnail on Kindle devices. Some complex formatting may be lost during conversion to this format.

KF8 (aka AZW3): Based on HTML 5. Can be emailed as one component of a Master MOBI created using Amazon's Kindle Previewer. Will sync annotations and reading position across devices if emailed. Will not show a cover thumbnail on Kindle devices unless sideloaded using calibre. Allows use of custom fonts and adjustment of font boldness. Allows richer formatting than MOBI format.

KFX: Based on Amazon's proprietary Ion format. Cannot be emailed, must be sideloaded. Will not sync annotations and reading position across devices. Adds Enhanced Typesetting features such as hyphenation, ligatures, and kerning. See this page for more details.

12-30-2021, 05:38 PM	#52
jhowell Grand Sorcerer Posts: 7,087 Karma: 91577715 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	Since my name was mentioned three times in the previous post I am bound to respond even though I think this thread is the wrong place to delve into the new question that was asked. Here is a basic summary of the differences between Kindle formats for reflowable books on current Kindle devices. Some of the restrictions only apply to books you create yourself and either sideload via USB or email. MOBI: Based on HTML 3. Can be emailed or sideloaded. Will sync annotations and reading position across devices if emailed. Will show a cover thumbnail on Kindle devices. Some complex formatting may be lost during conversion to this format. KF8 (aka AZW3): Based on HTML 5. Can be emailed as one component of a Master MOBI created using Amazon's Kindle Previewer. Will sync annotations and reading position across devices if emailed. Will not show a cover thumbnail on Kindle devices unless sideloaded using calibre. Allows use of custom fonts and adjustment of font boldness. Allows richer formatting than MOBI format. KFX: Based on Amazon's proprietary Ion format. Cannot be emailed, must be sideloaded. Will not sync annotations and reading position across devices. Adds Enhanced Typesetting features such as hyphenation, ligatures, and kerning. See this page for more details.