APNX File - opening and understanding

Did your computer fail to open an APNX file? We explain what they are used for and recommend software that we know can open or otherwise handle your .APNX files.

What is an APNX file?

An .APNX file is an Amazon Kindle Page Number index file. The .apnx or the Amazon Page Number Index file extension is an e-book file type that Amazon Kindle normally utilizes. APNX files are pagination files used by Kindle devices, and they are firstly introduced in the 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 original print book's page numbers. APNX enables 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 it, the .apnx file is dormant and cannot be opened or edited by any means aside from opening it via Kindle e-books.

How to open APNX files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension APNX for different purposes. We have identified 2 APNX openers for Windows that is compatible with this specific type of APNX file.

Programs that open these files

We have not yet verified any programs for Mac that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!
We have not yet verified any web services that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Suggest another file format using extension APNX

While we know of one file format using the .APNX file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .APNX file.

Various viewers for this file format

These apps are known to open certain types of APNX files. Remember, different programs may use APNX files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Kobo Desktop EditionKobo Desktop EditionUser submitted
We have not verified any software that we know for certain will work with APNX-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with APNX-files. If you know one, please use the 'Suggest a program' link below and tell us about it!