DUN File Extension

Dungeon Defenders Saved Game Format
- File Type dun
- Developer Trendy Entertainment
- Popularity
- Application Internet Explorer
- Category Configuration Files
- Format Binary
What is a DUN file?
The DUN extension is related to Dungeon Defenders Saved Game Format and is classified in the Configuration Files category, which contains 200 files.
DUN files are supported by Windows. To settings a DUN file, you can choose from 2 programs such as Internet Explorer and Microsoft Windows.
How to open a DUN file?
If you cannot open a DUN file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.
Internet Explorer and Microsoft Windows stand out as the preferred programs to manage DUN files effectively. To install the current version of Internet Explorer, go directly to the official Microsoft website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle DUN files via Internet Explorer.
Set Internet Explorer as the default DUN program
Change Default Program on Mac
- Right click or Control + left click on the desired DUN file;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for Internet Explorer. Check the box next to "Always open in app" to set it as the default option.
Set default programs for Windows
- Start by right-clicking on your DUN file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the Internet Explorer application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening DUN files.
Solve problems with DUN files
DUN files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
What are the ways to check if my DUN file is damaged?
DUN configuration files that have become corrupted may display one or more of the following symptoms:
- The file does not respond or shows errors when opening it;
- The file stops responding or freezes in Internet Explorer or other programs;
- Unexplained DUN file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does Internet Explorer crash or shut down frequently?
Insufficient updates for Microsoft products can cause Internet Explorer to crash. Be sure to regularly install the latest software updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
Is there any specific software or utility that can help repair a damaged DUN file?
Use a recovery program to open the damaged DUN file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged configuration files.



