.DEF File Overview

File Extension:	DEF
File Type Description:	Module Definition File
File Type Developer:	Microsoft Corporation
Primary Associated Software:	Microsoft Visual Studio
Primary Software Developer:	Microsoft Corporation

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What is File Extension DEF?

Module Definition File files were originally developed by Microsoft Corporation for the Microsoft Visual Studio software application. Visitor data analysis shows that these Module Definition File files are typically seen on Windows 10 user machines from United States. Statisically, these users are most likely running the Google Chrome internet browser.

Associated Developers and Software

	IObit Malware Fighter by IObit
	SmartWare II by SmartWare Corporation
	Microsoft Visual Studio by Microsoft Corporation
	Elecbyte M.U.G.E.N by Elecbyte
	Microsoft Visual C++ by Microsoft Corporation

Top DEF User Languages

Top DEF File User Browsers

Desktop Friendly?

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Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Mac
	Linux

Other File Types Related to DEF Files

Extension	File Type Developer	File Category	File Type Description
.IME	Microsoft Corporation	System Files	Windows Input Method Editor File
.LIB	Various Developers	Data Files	Generic Data Library
.SDC	Stardock Corporation	Backup Files	Stardock Central Download Archive
.MTD	Musicnotes	Uncommon Files	Musicnotes Digital Sheet Music File
.ECW	ESRI (Environmental Systems Research Institute)	Raster Image Files	Enhanced Compression Wavelet Image
.MDI	Microsoft Corporation	Page Layout Files	Microsoft Document Imaging File
.XL	Microsoft Corporation	Spreadsheet Files	Excel Spreadsheet
.CRDS	Microsoft Corporation	Backup Files	Windows CardSpace Backup File
.TIM	Sierra Entertainment	Game Files	The Incredible Machine Level
._SLN71	Microsoft Corporation	Data Files	Microsoft Visual Studio File