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3DMDEF file extension

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

  • What is the .3dmdef file?
  • What program do I need to open a .3dmdef file?
  • How can the .3dmdef file be opened, edited or printed?
  • How can I convert .3dmdef files to another format?

Table of Contents

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

1 extension(s) and 0 alias(es) found in database

✅ 3DMark Definitions Data

3DMark Definitions Data .3dmdef file icon
The 3DMDEF file is a 3DMark Definitions Data. 3DMark is a benchmark designed to measure the performance of computer hardware.
3DMDEF format description 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

Other types of files may also use the .3dmdef file extension.

🔴 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:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .3dmdef file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. 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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