CMI File Type

- The quick facts

What are CMI files and how to open them

Are you having problems opening a CMI file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a CMI file?

A .CMI file is an OCaml bytecode (compiled interface) file.

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open CMI files

Important: Different programs may use files with the CMI file extension for different purposes, so unless you are sure which format your CMI file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 7 different CMI openers which you will find listed below.

Last updated: December 15, 2021

Suggest another file format using extension CMI

While we know of one file format using the .CMI file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .CMI file.

Various apps that use files with this extension

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.