A daily updated filename extension database!

3DI file extension

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

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

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

✅ Cadence Allegro 3D Model

3DI file is a Cadence Allegro 3D Model. Cadence Allegro is a PCB (Printed Circuit Board) layout system.
3DI format description not yet available
Category: Document files
Application: Cadence Allegro
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
3DI aliases:
3DI related links:
3DI related extensions:
Cadence Allegro PCB Layout

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:

wdi, rdi, di, 3d, edi, 3do, 3dk, 3dl

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Rohos Disk Image
SPEFO Differential Spectrum Data
WinDev Component Description
D Language Source Code
CAD-3D Model
GROMACS Essential Dynamics Information
Cadwork 3D Drawing
LightConverse 3D Scene
Total Annihilation 3D Object
ENVI-met Information File

🔴 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:


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!

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