3DT File

What are 3DT files and how to open them

Are you having problems opening a 3DT file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your 3DT files.

What is a 3DT file?

A .3DT file is a FoxGraph Data file.

FoxGraph Data files (.3DT) are data files used by the FoxGraph application, a module written for Foxbase Plus (originally by Fox Software) in the late 1980s that produces and stores 3-dimensional business graph data. These files hold representations of 3D and 2D graphs created within FoxGraph, enabling storage of plotted graph data for later viewing, printing, or exporting.

These .3DT files are created and written by the FoxGraph program; users typically generate them when saving a graph session or exporting graph definitions. Once created, they are read by FoxGraph to redraw the graph, adjust graphical style or axes, or to regenerate output for print or display. Users may open these files only inside Foxbase or FoxPro when FoxGraph is installed as an add-on.

The format is identified by specific byte signatures: it begins with the bytes 3D 10 00 at offset 0, and byte 00 at offset 4.

How to open 3DT files

Important: Different programs may use files with the 3DT file extension for different purposes, so unless you are sure which format your 3DT file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested four different 3DT openers which you will find listed below.

Last updated: August 16, 2026

Various apps that use files with this extension

These apps are known to open certain types of 3DT files. Remember, different programs may use 3DT files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about 3DT file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.