File Extension Library


.APPT File Extension

  • Category: Encoded and encrypted Files

What is an .APPT file?

.APPT file extension has been classified as Encoded and encrypted Files.

.APPT is Authentica Secure Office protected PowerPoint presentation

The appt file extension was in the past used for a specially protected PowerPoint presentation encrypted using the Authentica Secure Office.

Seems like old product as the developer and its product portfolio was acquired by EMC Corporation. Probably known by another name now.

.APPT file format is deprecated and this file format is no longer supported.

Currently, .APPT file type is not actively used and is obsolete. This usually happens with system files in older operating systems, files from long-discontinued software, or with previous versions of some file types (documents, projects, images, etc.) that were replaced in later versions of the original programs.


How to open:

You can access these files using Authentica Secure Office.

How to convert:

Probably cannot be converted to other formats.

How to Open .APPT file on different platforms

Open .APPT File on Windows

  • Right-click a .APPT
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .APPT file and Select check box "Always use this app to open .APPT files" Press "Ok"

Open .APPT File on Mac

  • Right-click (or Ctrl + Left-click) the .APPT file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .APPT File on Linux

Right click on the .APPT file, choose "Open with" and select a program from the list above

Open .APPT File on iPhone

Select a file. If you don't see an application to open the .APPT file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .APPT File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .APPT files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .APPT files

  1. You need to update the application that you normally use to open .APPT files. Only the latest version of the software supports the current .APPT file format
  2. You need to check the .APPT file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)