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M4 file extension

The table below provides useful information about the .m4 file extension. It answers questions such as:

  • What is the .m4 file?
  • What program do I need to open a .m4 file?
  • How can the .m4 file be opened, edited or printed?
  • How can I convert .m4 files to another format?

Table of Contents

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

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

✅ M4 Macro File

M4 file is an M4 Macro File. m4 is a general purpose macro processor designed by Brian Kernighan and Dennis Ritchie. The name "m4" stands for "macro": the letter m plus 4 other characters. GNU M4 is an implementation of the traditional Unix macro processor.
Application: GNU M4
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
M4 aliases:
M4 related links:
M4 related extensions:
Sendmail M4 Configuration Source

Sendmail M4 Configuration File

Other types of files may also use the .m4 file extension.

🚫 The .m4 file extension is often given incorrectly!

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

h4, j4, k4, me, mr, mt

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

MonkeyTalk Script
Readme Document
jBASE J4 Data
Hierarchical Data Format File
DataFlex Index
Mapped Read Format Data

🔴 Can't open a .m4 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 .m4 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 .m4 file extension, write to us!

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