3DI file - How do I open a .3di file?
The table below provides useful information about the .3di file extension. It answers questions such as:
- What is the .3di file?
- What program do I need to open a .3di file?
- How can the .3di file be opened, edited or printed?
- How can I convert .3di files to another format?
Table of Contents
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3 extension(s) and 0 alias(es) found in database
✅ Cadence Allegro 3D Model

The 3DI file is a Cadence Allegro 3D Model. Cadence Allegro is a PCB (Printed Circuit Board) layout system.
✅ Altair FEKO 3D Artwork Data

The 3DI file is an Altair FEKO 3D Artwork Data. Altair Feko is a comprehensive computational electromagnetics (CEM) code used widely in the telecommunications, automobile, space and defense industries.
✅ Delta Force Game Object Collection Data

The 3DI file is a Delta Force Game Object Collection Data. Delta Force is a tactical first-person shooter computer game by developer and publisher NovaLogic.
Other types of files may also use the .3di file extension.
🚫 The .3di file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .3di 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:
example.3di
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 .3di 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 .3di file extension, write to us!