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Amazon Kindle ebook index
File type: E-book file
Files with apnx suffix can be typically found as ebook index files from Amazon Kindle platform. Used to speedup loading of ebooks.
File type category:
E-book file
Date updated: February 28, 2017
The apnx file extension is mainly associated with Amazon Kindle ebook platform and used for one of its default file type.
This type of apnx files was introduced to Kindle in firmware revision 3.1 and represents an index, generated to map and speedup the loading of pages of individual e-books.
When you open a book in Kindle, its index is loaded automatically to improve the loading times.
Index files usually cannot be converted to anything else, they are generated to speedup loading of the Kindle ebook.
Software applications that handle other tasks involving apnx files:
Microsoft Windows
Apple macOS / Mac OS X
Apple iOS
Google Android
Amazon Kindle