A daily updated filename extension database!

MM file extension

The table below provides useful information about the .mm file extension. It answers questions such as:

  • What is the .mm file?
  • What program do I need to open a .mm file?
  • How can the .mm file be opened, edited or printed?
  • How can I convert .mm files to another format?

We hope you find this page helpful and a valuable resource!

2 extension(s) and 0 alias(es) found in database

✅ 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
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
MM aliases:
MM related links:
MM 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 is a FreeMind MindMap. FreeMind is a free mind mapping application written in Java.
Category: Data files
Application: FreeMind
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
MM aliases:
MM related links:
MM related extensions:
MindMapper Map

MindMapper Single File

MindMapper 12 XML Map

Other types of files may also use the .mm file extension.

🚫 The .mm file extension is often given incorrectly!

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

hm, jm, km, lm, mh, mj, mk, ml, mn, nm

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

WinHelp Context ID
Palladio ModelJoin Query File
jMusic Music Score
GNU Makefile
BMC Patrol Knowledge Module
OCaml Source Code
ARPA-MIT Language Model File
RM Number Magic Document
Teli Fax Image
MuPAD Notebook Document

🔴 Can't open a .mm 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .mm file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .mm file extension, write to us!

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