4MU File Type

- The quick facts

What are 4MU files and how to open them

Are you having problems opening a 4MU file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a 4MU file?

A .4MU file is a Wikireader Forth Program file.

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open 4MU files

Important: Different programs may use files with the 4MU file extension for different purposes, so unless you are sure which format your 4MU file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: December 23, 2011

Suggest another file format using extension 4MU

While we know of one file format using the .4MU file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .4MU file.