CMPCK file format description

Many people share .cmpck files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cmpck file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cmpck files.

1 filename extension(s) found in our database.

.cmpck - CET Designer Pack and Go Data

The CMPCK data files are related to CET Designer. The CMPCK file is a CET Designer Pack and Go Data. CET Designer is a complete design, specification and visualization tool, allowing you to complete every step of the proposal process in one program.

CET Designer
Data files
- / -
CET Designer Pack and Go Data related extensions:
iWork Keynote Encrypted Data
ENVI Calibration Factors Data
ZX Spectrum Emulator Tape Data TZX
Microsoft Office Outlook Saved Search
Novell GroupWise E-mail View Data
SATURN Suite Node to Group Data

Naturally, other applications may also use the .cmpck file extension. Even harmful programs can create .cmpck files. Be especially cautious with .cmpck files coming from an unknown source!

Can't open a .cmpck file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cmpck file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:


Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Professor Layton Game Package

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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