The .apnx or the Amazon Page Number Index file extension is an e- book file type that normally utilized by Amazon Kindle. APNX files are pagination files used by Kindle devices and they are firstly introduced in 3.1 firmware version. APNX files are files specifically created to mark the pages of Kindle e- books.
APNX files can be found in maps page numbers of the digital book to the page numbers of the original print book. APNX enable readers to see the page numbers of the e- book. It is saved on the devices and can only be opened if an e-book is already downloaded. While there is no e- book to support, .apnx file is a dormant file and cannot be opened or edited by any means aside from opening it via Kindle e- books.
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