CMI file format description

Many people often share .cmi files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .cmi files. To address this issue, we have created this page to offer assistance and guidance on handling .cmi files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .cmi files.

Our aim is to simplify the process and promote seamless use of the .cmi file format.

3 filename extension(s) found in our database.

.cmi - OCaml Compiled Interface

The CMI development files are related to OCaml. The CMI file is an OCaml Compiled Interface. OCaml (Objective Caml) is the main implementation of the Caml programming language, created by Xavier Leroy.

Development files
- / -
OCaml Compiled Interface related extensions:
OCaml Compiled Bytecode
OCaml CMT Data
OCaml Library
OCaml Source Code
OCaml Interface Source
OCaml Ocamlyacc Input Data

.cmi - Camomile Interface Data

The CMI data files are related to Camomile. The CMI file is a Camomile Interface Data. Camomile is a Unicode library for ocaml. Camomile provides Unicode character type, UTF-8, UTF-16, UTF-32 strings, conversion to/from about 200 encodings, collation and locale-sensitive case mappings, and more.

Data files
- / -
Camomile Interface Data related extensions:
Camomile Library
Camomile Module

.cmi - The Dig Game CMI Data

The CMI game data files are related to The Dig. The CMI file is a The Dig Game CMI Data. The Dig is a graphical point-and-click adventure game developed by LucasArts.

The Dig
Game Data files
- / -
The Dig Game CMI Data related extensions:
Oolite Expansion Pack
Tales of Fantasy Skeletal Model
Infinity Engine Variables Data
City of Heroes Data
Infinity Engine WAVC Audio Data
Vietcong Data

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

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

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. By providing this list, we aim to assist users in finding the correct information more easily and improving their overall search experience on our site.

These misspellings were the most common in the past year:

chi, ci, cim, cki, cli, cm, cmj, cmk, cml, cmo, cmu, cni, dmi, fmi, mci

Is it possible that the filename extension is misspelled?

There is a possibility that the .cmi filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .cmi:

iBlaze Case Information File
CryptoMailer Encrypted File
Media Control Interface Data
GTA San Andreas CLEO Custom Mission
Andrew Toolkit CMU Data
SAMI Captioning File

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

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 .cmi file format, then write to us! >> CMI file