Files with cmk extension are used for Card Shop Plus. They contain some graphic data.

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CMK file extension - Card Shop Plus card file

What is cmk file? How to open cmk files?

File type specification:

Graphics file type icon Graphics file type

The cmk file extension is related to Card Shop Plus, an old greeting card program from Creative Wonders.  You can still find it on Amazon.

A *.cmk file is the default greeting card format of the program.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .cmk file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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