Opening a 3DI File

The 3DI file type is primarily associated with Cadence 3D Design Viewer.

3DI	File extension: 3DI
	File type:	3D model

What is a 3DI file?

3DI files mostly belong to Cadence 3D Design Viewer. These 3DI files are 3D model files used to store and display three-dimensional design data. They contain the information needed to render detailed models and enable interactive viewing for design and engineering work.

3D Data Storage: The file holds geometry, surfaces, and spatial vector details.

Interactive Viewing: They are optimized for use with a dedicated viewer, allowing rotation, zooming, and detailed inspection.

Proprietary Format: They work best with software developed by the file’s originating company.

FilExt.com tip: The primary tool for these files is the Cadence 3D Design Viewer, and further details can be found on the Cadence website. Advanced users sometimes convert these files to formats like .OBJ or .STL for broader compatibility.

How can I open a 3DI file?

You need a suitable software like Cadence 3D Design Viewer to open a 3DI file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your 3DI file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a 3DI file directly in the browser:. Just drag the file onto this browser window and drop it.

Online 3DI Text Viewer

Choose your .3di file to analyze

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Online File Viewer

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Programs that open and convert 3DI files:

Cadence 3D Design Viewer
See the previous paragraphs to learn more about the main application. 3DI files are often referred to as Cadence 3D Design Viewer 3d images because this type of file is primarily created or used by this software.
Delta Force (Object Collection) by NovaLogic, Inc.
The .3DI file holds the 3-D makeup of buildings, decorations, objects, weapons etc. for the game. This file format is classified as Game.

3DI file format:

To find out what program is needed to open 3DI files, you need to determine the file format. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. When there is a problem with a file, the first step to solving it is to determine the file format. Our evaluation of the 3DI files is as follows:

3DI is seldom used as a file extension and is used by a few programs, each with its own file format. However, the following two file formats are common:

50% of all 3DI files start with the bytes 3D crucial for this file format. They consist of illegible, cryptic characters. 3DI files are between 200 bytes and 610 KB in size. The file type was developed 10 years ago and is still in use today. Certain words are almost always found in the files, such as GHDR, INFO and USRP.
10% of all 3DI files have the same signature GP. They consist of illegible, cryptic characters. A typical file size is 270 KB.

The remaining 40% of all 3DI files are different files with different signatures. If you want to find out what your 3DI file contains, drag and drop it onto this page.

Technical Data for 3DI File Extension

File classification:

3D Image

Related files:

i3d, 3dl, jdf, aso, collection, obj, stl, fbx, 3ds, dae

a 3di 3D model is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with 3DI files

Associate the 3DI file extension with the correct application.
Update your software that should actually open 3d models. Because only the current version supports the latest 3DI file format. Search, therefore, e.g. on the manufacturer website after an available Cadence 3D Design Viewer update.
To make sure that your 3DI file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .3DI file online - secure, fast, and no downloads needed.