File Extension Library


.ACK File Extension

  • Developer by: Adobe Systems Incorporated
  • Category: Plugin, addon Files

What is an .ACK file?

.ACK file extension is created by Adobe Systems Incorporated. .ACK has been classified as Plugin, addon Files.

.ACK is Swifty data

The ack file extension seems to be mainly related to Swifty Extension for Adobe Flash a multimedia and software platform.

Found as Swiffy.ack in the folder:

C:\Users\[user]\AppData\Local\Adobe\Flash CS5.5\en_US\Configuration\Extensions

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

Currently, .ACK file type is not actively used and is obsolete.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:

When placed in the default folder, these plugins/extensions may be loaded by the program.

How to convert:

This file type most likely cannot converted to anything else and there may not even be reason to do so.

How to Open .ACK file on different platforms

Open .ACK File on Windows

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

Open .ACK File on Mac

  • Right-click (or Ctrl + Left-click) the .ACK 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 .ACK File on Linux

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

Open .ACK File on iPhone

Select a file. If you don't see an application to open the .ACK 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 .ACK 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 .ACK files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .ACK files

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