The File Extensions Database

.APNX File Extension

  • Developer by: Amazon
  • Category: eBook Files
  • Format: Binary

What is an .APNX file?

.APNX is Amazon Page Number Index File

Pagination file used by Amazon Kindle devices starting with the 3.1 firmware version; maps page numbers of the digital book to the page numbers of the original print book; allows Kindle readers to see page numbers; saved on the device and not meant to be opened or edited manually.

APNX files are often made available with Amazon eBooks (.AZW file).

Programs that open Amazon Page Number Index File
Amazon Kindle for PC
Amazon Kindle for Mac

How to solve problems with APNX files

  • Associate the APNX file extension with the correct application. On :
    Windows: Right click on any APNX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.APNX files". Mac: Right click (or Ctrl-click) the APNX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .APNX is Amazon Page Number Index File. Because only the current version supports the latest APNX file format. Search, therefore, e.g. on the Amazon manufacturer website after an available .APNX is Amazon Page Number Index File update.
  • To make sure that your APNX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.