File Extension Library


.ACK File Extension

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

What are .ACK files and how to open them?

Can't open .ACK file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .ACK file.

What is a .ACK file extension?

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Currently, .ACK file type is not actively used and is obsolete.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