How to open DEF files
Did your computer fail to open a DEF file? We explain what DEF files are and recommend software that we know can open or convert your files.
What is a DEF file?
Files that contain the .def file extension are most commonly associated with Microsoft Visual C++ definition files. These files list the exports and attributes of a specific program that is linked by an application linker.
The DEF file format is commonly used when creating a dynamic link library during the development of a software application.
The 3D Fassade Plus software application also uses the .def file extension. These DEF files contain definition module files that are used by the software.
A variety of Nova Logic software games also use files with the .def file suffix. These DEF files contain game weapon files that are referenced by the software during a user's gameplay.
Update info Upload example file
DEF file openers, viewers, etc.
These apps are known to open certain types of DEF files. Remember, different programs may use DEF files for different purposes, so you may need to try out a few of them to be able to open your specific file.
 | Stuffit Expander | User submitted |
 | Army Builder | User submitted |
 | Any Video Converter Professional | User submitted |
 | Microsoft Visual Studio .NET | User submitted |
 | progeCAD Professional | User submitted |
 | Movie Magic Screenwriter | User submitted |
 | Flash Movie Player | User submitted |
 | WinEdt | User submitted |
 | progeCAD Professional English | User submitted |
 | Timetable | User submitted |