CMK file format description

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

1 filename extension(s) found in our database.

.cmk - CardShop Plus Document

The CMK document files are related to CardShop Plus. The CMK file is a CardShop Plus Document. CardShop Plus is a greeting card maker for Windows. The CardShop Plus seems to be no longer supported.

CardShop Plus
Document files
- / -
CardShop Plus Document related extensions:
I-DEAS Associated Data
ePhotoAlbum Album Data
Macromedia Flash Paper
Final Draft Template
thinEdge M15 File
gbXML Document

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

Can't open a .cmk 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 .cmk file extension is often given incorrectly!

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

chk, cjk, ck, ckm, clk, cm, cmj, cml, cmm, cmo, cmu, cnk, dmk, fmk, mck

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

ControlMyJoystick Profile
Pool of Radiance Game Data
ProWorx NXT Comment Data
Smacker Video
CryptoMailer Encrypted File
Chemical Markup Language File

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

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .cmk file format, then write to us! >> CMK file