Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .mm

3 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .mm file?
  • Which program can create the .mm file?
  • Where can you find a description of the .mm format?
  • What can convert .mm files to a different format?
  • Which MIME-type is associated with the .mm extension?
Matrix Market File .mm file icon

Matrix Market File

MM file is a Matrix Market File. MM is the file format used by the Matrix Market for the storage and exchange of matrices.
Category: Data files
Application: Wolfram Mathematica
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Mathematica Binary File
Mathematica ASCII File
Mathematica Notebook File
Mathematica NotebookML File
Mathematica Serialized Package
Mathematica MGF Bitmap
Mathematica Package
Mathematica Document
Mathematica for Mac OMEG Data
FreeMind MindMap .mm file icon

FreeMind MindMap

MM file is a FreeMind MindMap. FreeMind is a free mind mapping application written in Java.
Category: Data files
Application: FreeMind
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
MindMapper Map
MindMapper Single File
MindMapper 12 XML Map
Transport Fever Game Cache Data .mm file icon

Transport Fever Game Cache Data

MM file is a Transport Fever Game Cache Data. Transport Fever is a railroad-focused tycoon game for Microsoft Windows.
Detailed description not available
Category: Game Data files
Application: Transport Fever
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Transport Fever Game Mesh Data
Transport Fever Game Texture Data
Transport Fever Game Configuration
Transport Fever Game Text Data
Transport Fever Game Material Data
Transport Fever Group Parameters Data
Transport Fever Game Animation Data
Transport Fever Compressed Cache Data

Other types of files may also use the .mm file extension. If you have helpful information about .mm extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

WinHelp Context ID
jMusic Music Score
BMC Patrol Knowledge Module
ARPA-MIT Language Model File
Teli Fax Image
MovieJack DVD Ripper File
GNU Makefile
OCaml Source Code
MuPAD Notebook Document

The .mm filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

nm (1), ml (1), mj (1), lm (1), jm (1), mn (1), mk (1), mh (1), km (1), hm (1)

Can't open a .mm file?

If you want to open a .mm file on your computer, you just need to have the appropriate program installed. If the .mm association isn't set correctly, you may receive the following error 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 from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android