MUI File - opening and understanding

Did your computer fail to open a MUI file? We explain what they are used for and recommend software that we know can open or otherwise handle your .MUI files.

What is a MUI file?

MUI stands for Multilingual User Interface. Files that contain the .mui file extension are resource files that are used by Windows operating systems, versions 2000 and later. The MUI files contain resources that allow you to change your Windows interface to display different languages. For example, if you prefer your user interface to be displayed to you in German or in Spanish instead of English, your MUI files would allow this to happen.

While files with the .mui extension are most commonly associated with the Windows Multilingual User Interface, they can also be created by an Open GL toolkit used to write OpenGL programs.

How to open MUI files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension MUI for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different MUI openers which you will find listed below.

Suggest another file format using extension MUI

While we know of one file format using the .MUI 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 .MUI file.

Various viewers for this file format

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

Free File ViewerFree File ViewerUser submitted
RealPlayerRealPlayerUser submitted
iTunesiTunesUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
MuseMuseUser submitted
Picasa Photo ViewerPicasa Photo ViewerUser submitted
7-Zip7-ZipUser submitted
Any Video Converter FreeAny Video Converter FreeUser submitted
Resource HackerResource HackerUser submitted
We have not verified any software that we know for certain will work with MUI-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with MUI-files. If you know one, please use the 'Suggest a program' link below and tell us about it!