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?

CMI files are OCaml bytecode (compiled interface) files, which you can read more about below.

The CMI file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a CMI opener may not be able to open all kinds of CMI files. In this case, though, we only know of one specific use.

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.

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!

CMI file openers, viewers, etc.

These apps are known to open certain types of CMI files. Remember, different programs may use CMI files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Microsoft OfficeMicrosoft OfficeUser submitted
CitycomPlayerCitycomPlayerUser submitted
ImagenationImagenationUser submitted
CSMCSMUser submitted
ZaZ GP4 ToolsZaZ GP4 ToolsUser submitted
CD MateCD MateUser submitted
ImagenationImagenationUser submitted
We have not verified any programs that we know for certain can work with CMI-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 CMI-files. If you know one, please use the Suggest link below and tell us about it!