File Extension Library

.CPK File Extension

  • Developer by: Microsoft
  • Category: Data Files
  • Format: Binary

What is an .CPK file?

.CPK file extension is created by Microsoft. .CPK has been classified as Data Files. The format of .CPK file is Binary.

.CPK is DTM Test Log File

Log file generated by Driver Test Manager (DTM), a component of Microsoft's Windows Logo Kit (WLK) device certification software; contains a testing report, which logs information about a hardware device; used for submitting test results to Microsoft so that a device may be certified for Windows; also used for debugging failed tests.

CPK files can be viewed with the DTM Log Viewer. The viewer shows information such as the test date, the test operating system, and passed and failed tests.

The WLK software is made available by the Windows Hardware Quality Labs (WHQL), a Microsoft group that certifies Windows hardware devices.

List of all softwares that can open the DTM Test Log File
Microsoft DTM Log Viewer
Microsoft Winqual Submission Tool
File Type 2:

CRI Middleware Package

Developer by: CRI Middleware Category: Game Files Format: Binary

Game package file used by games created with the CRI Middleware packaging software; can store graphics, audio, and other game data; used as a container for game files.

CRI Middleware technology is used to package data for various game console systems, including those from Microsoft, Nintendo, Sega, and Sony.

How to Open .CPK file on different platforms

Open .CPK File on Windows

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

Open .CPK File on Mac

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

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

Open .CPK File on iPhone

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

How to fix problems with .CPK files

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