Card Shop Plus card file
File type: Graphics file
Files with the .cmk file extension are card files used by Card Shop Plus, an old greeting card program. They contain graphic data for a greeting card.
File type category:
Graphics file
Date updated: November 4, 2026
Card Shop Plus was a greeting card application from Creative Wonders for older Windows systems. You can still find the program on Amazon.
A .cmk file is the program's default greeting card format and stores the graphic content of a card created in Card Shop Plus.
Open a .cmk file with the original Card Shop Plus software. Because the program is old, it may require a compatible legacy Windows environment to run on a current computer.
Open the file in Card Shop Plus and use any print options provided by the program to create a more accessible copy.
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