File Extension Database

Open MUI File

File extension MUI used by Windows OS to store Multilingual User Interface. MUI files are internal windows files and are only used by Windows software. Typical MUI file will contain definitions and layouts of specific user interface elements which depend on region or language of the Windows operating system in use.

MUI could also mean Micro User Interface library which is part of OpenGL. Typically OpenGL MUI library doesn't produces files with MUI file extension thus file with MUI extension will typically be a Multilingual User Interface.

Frequently MUI file extension could be appended to an end of the already existing file. For example Myfile.dll could become Myfile.dll.mui which will store language specific definitions for Myfile.dll. One language specific file is used per supported language.

How Can I Open MUI File on Windows

We researched and learned that the best way to open MUI file is to find a MUI file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a MUI file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open MUI file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as MUI file opener then try to search online for "MUI viewer", "application to open MUI file" or "open MUI file" queries in the search engine you like.
Install the application you found and check if it can open MUI file

How Can I Open MUI File on Mac OS

We recommend to find a MUI file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a MUI file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with MUI file.
If you know the Mac OS application which can work as MUI file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open MUI file in it.
If you don't know the application which can open MUI file then try to search for "MUI viewer", "application to open MUI file" or "read MUI file" queries in the online search engine you like.
Install the application you found and check if it can read MUI file

How Can I Open MUI File on Android

If you downloaded a MUI file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded MUI file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "MUI".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "MUI viewer", "MUI file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open MUI File on iPhone or iPad

To open MUI File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the MUI file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "MUI". This way you can find apps which can open MUI files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "MUI viewer" or "MUI file" online in your favorite search engine.