A daily updated filename extension database!

DEF file extension

The table below provides useful information about the .def file extension. It answers questions such as:

  • What is the .def file?
  • What program do I need to open a .def file?
  • How can the .def file be opened, edited or printed?
  • How can I convert .def files to another format?

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

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

✅ C++ Definition File

.def
Description:
DEF file is a C++ Definition File. C++ is a general-purpose programming language. It is a statically-typed free-form multi-paradigm language supporting procedural programming, data abstraction, object-oriented programming, and generic programming.
Application: Visual C++
Mime-type: text/plain
Magic number: -
Magic string: -
Sample: -
DEF aliases:
-
DEF related links:
-
DEF related extensions:
Assembly Source Code

C Source Code

C++ Source Code

Visual C++ Dialog

Fortran Source Code

C Header File

Microsoft Visual Studio Workspace Options

Pascal/Delphi Source Code

Visual C# .NET Class

Visual Studio Resource Script

✅ Binary Editor Definition Data

.def
Description:
DEF file is a Binary Editor Definition Data. The Binary Editor software allows for editing of the Ford EEC binary data. Its definition files (Strategy Files) are open source and are saved in Excel.
DEF format description not yet available
Application: Binary Editor
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
DEF aliases:
-
DEF related links:
-
DEF related extensions:
EEC Analyzer Data

✅ SmartWare Definition Data

.def
Description:
DEF file is a SmartWare Definition Data. SmartWare is a programming platform. SmartWare also includes a word processor, spreadsheet, and communication modules.
DEF format description not yet available
Category: Data files
Application: SmartWare
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
DEF aliases:
-
DEF related links:
-
DEF related extensions:
SmartWare Project Backup

SmartWare Worksheet Backup

SmartWare Macro Backup

SmartWare Worksheet Document

SmartWare Report Definition File

SmartWare Business Graph Definition File

SmartWare Text Graph Definition File

SmartWare Scientific Graph Definition File

SmartWare Elevation Graph Definition File

SmartWare High-Low Graph Definition File

Other types of files may also use the .def file extension.

🚫 The .def file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cef, d3f, ddf, de, deb, dec, ded, dee, der, det, dev, df, dff, drf, dsf

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

VersaPro Declaration File
Diamond Directive File
ProWorx NXT Descfriptor Data File
IAR System C-SPY Device Description Data
CenturionMail Encrypted Email
Paradox Table Filter
Embird Editor File
Certificate File
Sega Dreamcast Audio Data
X-Genics eManager Form Data

🔴 Can't open a .def 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:

example.def

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 .def 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 .def file extension, write to us!

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