CM3 file format description

Many people share .cm3 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cm3 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cm3 files.

1 filename extension(s) found in our database.

.cm3 - CaseMap 3 Data

The CM3 data files are related to CaseMap. The CM3 file is a CaseMap 3 Data. CaseMap is a fact management database application used to manage, organize and connect case.

Data files
- / -
CaseMap 3 Data related extensions:
CaseMap 1 Data
CaseMap 10 Data
CaseMap 4 Data
CaseMap 6 Data
CaseMap 7 Data
CaseMap 8 Data

Naturally, other applications may also use the .cm3 file extension. Even harmful programs can create .cm3 files. Be especially cautious with .cm3 files coming from an unknown source!

Can't open a .cm3 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 .cm3 file extension is often given incorrectly!

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

c3, ch3, ck3, cl3, cm, cme, cmr, cmw, cn3, dm3, fm3, m3, mc3, sm3, xm3

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Cn3D Data
Command Multimedia Evidence Data
Quake 3 Arena Demo
Gatan DigitalMicrograph 3 Image
Eudemons Online 3D Model
Crazy Machines Experiment

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 .cm3 file format, then write to us! >> CM3 file