The File Extensions Database


.DEMO4 File Extension

  • Developer by: Epic Games, Inc.
  • Category: Digital video and movie Files

What is an .DEMO4 file?

.DEMO4 is Unreal Tournament 2004 demo

The demo4 file extension is associated with the Unreal Tournament 2004, a 3D action shooter for Microsoft Windows and Apple OS X (macOS) operating systems.

The demo4 file stores demo, captured in UT 2004.


How to open:

Use DemoPlay4 to work with *.demo4 files.

How to convert:

As far as we know, this .demo4 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

How to solve problems with DEMO4 files

  • Associate the DEMO4 file extension with the correct application. On :
    Windows: Right click on any DEMO4 file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.DEMO4 files". Mac: Right click (or Ctrl-click) the DEMO4 file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .DEMO4 is Unreal Tournament 2004 demo. Because only the current version supports the latest DEMO4 file format. Search, therefore, e.g. on the Epic Games, Inc. manufacturer website after an available .DEMO4 is Unreal Tournament 2004 demo update.
  • To make sure that your DEMO4 file is not corrupted or virus-infected, get the file again and scan it with antivirus software.