.m4 M4 macro
Text & source code
| MIME type | application/x-m4 |
|---|---|
| Description | M4 macro |
| Category | Text & source code |
| Based on | text/plain |
Frequently asked questions
What is a .m4 file?
A .m4 file is a “M4 macro” (MIME type application/x-m4).
How do I open a .m4 file?
With any text editor – Notepad++, Visual Studio Code, or gedit and vim on Linux. The file contains readable text, possibly source code or configuration.
How can you tell a genuine .m4 file?
No fixed signature at the start of the file is registered for this format; it is recognised mainly by its extension. On Linux and macOS, file --mime-type example.m4 shows the guessed type.
Which format is .m4 based on?
Technically a .m4 file is a subtype of “Plain text document” (text/plain), so programs for that base format can often read it too.
Which MIME type belongs to .m4?
The MIME type is application/x-m4. In the Apache web server: AddType application/x-m4 .m4; in nginx: types { application/x-m4 m4; }.