USX File Extension
Unreal Static Meshes
- File Type usx
- Developer Epic Games
- Popularity
- Application UnrealEd
- Category Game Files
- Format Binary
What is a USX file?
The USX file extension is linked to Unreal Static Meshes and belongs to the Game Files category, which includes 1265 files.
The Unreal Static Meshes (USX), created by Epic Games, is one of file format they developed, and they also built 12 programs to support them.
USX files are supported by Windows. When working with USX files, you can rely on 2 programs, including UnrealEd and Unreal Development Kit.
How to open a USX file?
If you can’t open a USX file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.
The most popular programs for working with USX files are UnrealEd and Unreal Development Kit. To install the latest version of UnrealEd on your computer, visit the Epic Games website where you can download the version available for all operating systems.
Following installation, USX files should be automatically opened with UnrealEd.
Set UnrealEd as your default USX viewer
Changing the default program in Windows
- Right-click on your USX file, then choose the "Open with" option and select "Choose another application" from the available options;
- From the list of applications in the pop-up window, find and select UnrealEd as your desired application;
- Check the "Always use this app" checkbox, and then click "OK" to set your chosen app as the default for opening USX files.
Set default app to open files on Mac
- Right-click or Control + left-click on the desired USX file to open a menu of available actions;
- Select "Open in application" and click "Other";
- Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
- Within this menu select "All Programs" and navigate to UnrealEd. Check the box next to "Always open in app" to make sure it’s the default option.
How to edit a USX file?
To edit USX files, you need to install specialized software that allows you not only to open but also to modify game files. Online USX editors usually provide fewer features than software created specifically for Unreal Static Meshes.
Best USX editors in 2026
Taking into account the provided details, we have prepared a list of USX editors that match your needs.
| USX Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| UnrealEd | Epic Games | Windows | 4.7 out of 5 (42 reviews) |
| Unreal Development Kit | Epic Games | Windows | 4.2 out of 5 (41 review) |
Solving Common USX File Challenges
When issues arise with USX files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.
What are the warning signs that my USX file may be corrupted?
Corrupted USX game files may have one or more of the following symptoms:
- Error messages appear during the course of working with the file;
- Poor performance when editing a file in UnrealEd;
- Attempts to open the file result in errors or failed results;
- Unexplained increase in USX file size;
- The file causes UnrealEd or other programs to hang or crash during operation;
Why does UnrealEd crash?
UnrealEd crashes can be caused by outdated software. Keep your Epic Games products up to date by installing the latest updates.
A simple restart of your computer can often fix many common problems, which is why it is the recommended first step before making any adjustments to your software settings.
How to repair a corrupted USX file?
Use a data recovery program to open the damaged USX file and from the menu choose "Repair" function to start the repair process. Please be patient while the recovery process completes, which will automatically restore the damaged game files.