A def file extension is related to the to definition files used SmartWare, Visual Studio and other apps.

There are 5 other file types using
the DEF file extension!

empty icon.def - Data Entry/Review Module file

empty icon.def - Nova Logic game weapon profile file

empty icon.def - ESwin wizard file

empty icon.def - id Tech 6 video settings

empty icon.def - IOBit Malware Fighter definitions

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DEF file extension - Definition data

What is def file? How to open def files?

File type specification:

Various data file type icon Various data file type

The def file extension is commonly used for so called definition files. These file contains various settings that define certain characteristic ,or operation parameters for programs, devices or their part. Such files are used by many different programs. Sometimes also used for export purposes.

For example module-definition files provide the linker with information about exports, attributes, and other information about the program to be linked. The def file is most useful when building a DLL

The default software associated to def file type:

Microsoft Visual Studio icon

Microsoft Corporation logoMicrosoft Visual Studio  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Visual Studio is an integrated development environment (IDE) used to create applications for Microsoft Windows, Windows Mobile, .NET Framework, Silverlight as well as dynamic websites and web applications.

Visual C++ icon

Microsoft Corporation logoVisual C++  Microsoft Windows software

Company or developer:
Microsoft Corporation

Visual C++ is integrated development environment for C and C++ programming language used to create Windows and .NET applications.

Help how to open DEF files:

Use Visual Studio and other tools to work with *.def files.

How to convert file with extension DEF:

As far as we know, this .def file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .def file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux etc.) and possible program actions
that can be done with the file
: like open def file, edit def file, convert def file, view def file, play def file etc. (if exist software for corresponding action in File-Extensions.org's database).

  • Others def file

Unspecified and all other actions for computer programs working with def file - Definition data

Click on the software link(s) for more information. Suggested software applications use def file type for internal purposes and/or also by different way than common edit or open def file actions.

Microsoft Windows:



Microsoft MS-DOS:

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