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3DMDEF file: How can I open a .3DMDEF file?

The table below provides useful information about the .3dmdef file extension. It answers questions such as:

We hope you find this page helpful and a valuable resource.

✅ 3DMark Definitions Data

.3dmdef
3DMark Definitions Data .3dmdef file icon
Description:
The 3DMDEF file is a 3DMark Definitions Data. 3DMark is a benchmark designed to measure the performance of computer hardware.
The 3DMDEF format description is not yet available
Category: Data files
Application: 3D Mark
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
3DMDEF aliases:
-
3DMDEF related links:
-
3DMDEF related extensions:
3DMark Report Database

QuickDraw 3D Metafile

3DMark Results Data

3DMark 2011 Project

QuickDraw 3D Data

⚠ Be careful with .3dmdef files.

It's important to know that the .3dmdef file extension can be used by various programs, not just the ones you expect. This includes potentially harmful software or malware that might create .3dmdef files. Be cautious when dealing with .3dmdef files from unknown sources.

🔴 Can't open a .3dmdef file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Select an app to open this .3dmdef file

It means that the operating system does not have a default app associated with the .3dmdef file type. To resolve this issue and open the file, you can take the following steps:

If you don't know how to change the default app for the .3dmdef file, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. The extension of a file serves as a hint to the operating system and various software programs about the type of data contained within the file. When you alter a file's extension, you essentially modify how software applications interpret and handle that file. Every file has a specific format, also known as its file type or file format. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .3dmdef file extension, write to us.

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