How to open CMG files

Did your computer fail to open a CMG file? We explain what CMG files are and recommend software that we know can open or convert your files.

What is a CMG file?

The CMG file extension indicates to your device which app can open the file. However, different programs may use the CMG file type for different types of data.

We are aware of 1 different use of the CMG extension, which you can read more about below.

Cramfs ROM filesystem package

Through our analysis of CMG files, we know that one use of the format is Cramfs ROM filesystem package. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

Software that will open, convert or fix CMG files

These apps are known to open certain types of CMG files. Since many different programs may use CMG files for different purposes, you may need to try a few of the apps to open your specific CMG file.

HxD Hex EditorHxD Hex EditorUser submitted
Sublime TextSublime TextUser submitted
We have not verified any programs that we know for certain can work with CMG-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with CMG-files. If you know one, please use the Suggest link below and tell us about it!