How to open CMI files

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

What is a CMI file?

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

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

OCaml bytecode (compiled interface)

Through our analysis of CMI files, we know that one use of the format is OCaml bytecode (compiled interface). 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.

Update info Upload example file

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 CMI files

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