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M File

What are M files and how to open them

Are you having problems opening a M file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your M files.

What is a M file?

M files have multiple uses, and Objective-C Methods is one of them. Read more about the other uses further down the page.

Objective-C Methods File

These files are source code files that contain class implementations written in the Objective-C programming language, usually using Apple Xcode on a Macintosh computer.

In C++, programmers use .cpp and .h files, where a .h header file contains the definition of a class of private and public methods and variables, and the .cpp file contains the actual implementation.

Objective-C takes it a step further, and separates .h files into .h and .m files. The .h header file contains all public methods of a class, and the .m file contains all private methods and data only accessible by the class implementation itself.

How to open M files

We have identified three M openers that are compatible with this specific type of M file.

Programs that open Objective-C Methods files


Last updated: February 20, 2024

All known file formats using extension .M

While Objective-C Methods File is a popular type of M-file, we know of 5 different uses of the .M file extension. Different software may use files with the same extension for different types of data.

Mathematica Source Code File

The Mathematica software application also uses the .m file extension. This program uses the .m file extension on files containing functions and commands.

M opener for Windows

We have identified one M opener that is compatible with this specific type of M file.


E Module/library

We know that one M format is E Module/library. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

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

Maple Common Binary File

We know that one M format is Maple Common Binary File. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

Twist Mail-merge Script

Twist is a database for the Commodore Amiga, a home computer popular in the 1990s. Twist stored scripts used for mail merging in .M (merge) files.

Various apps that use files with this extension

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

jGRASPjGRASPUser submitted
MATLABMATLABUser submitted
ApossApossUser submitted
CEMToolCEMToolUser submitted
OctaveOctaveUser submitted
GOM PlayerGOM PlayerUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
aPOSaPOSUser submitted
KMPlayerKMPlayerUser submitted
Octave EditorOctave EditorUser submitted

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about M file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.