.DER File Overview

File Extension:	DER
File Type Description:	DER Certificate File
File Type Developer:	Mozilla
Primary Associated Software:	Internet Explorer
Primary Software Developer:	Microsoft Corporation

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Home File Types Web Files DER

What is File Extension DER?

Mozilla developed the DER file extension, also know as a DER Certificate File file, for the Mozilla Firefox software package. Our data shows that DER files are frequently utilized by PC users in United States and popular on the Windows 10 platform. In most cases, these users are surfing the internet using the Google Chrome browser.

Associated Developers and Software

	Apple Keychain Access by Apple
	Mozilla Firefox by Mozilla
	Internet Explorer by Microsoft Corporation
	Apple Safari by Apple

Top DER User Languages

Top DER File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Mac
	iOS
	Android
	Linux

Other File Types Related to DER Files

Extension	File Type Developer	File Category	File Type Description
.MCT	Microsoft Corporation	Data Files	Windows Live Messenger Data File
.ATE	Microsoft Corporation	Backup Files	Office Accounting Compressed Backup
.ODCTABLEFILE	Microsoft Corporation	Data Files	Microsoft Office File
.AI	Adobe Systems Incorporated	Vector Image Files	Adobe Illustrator File
.P7C	Microsoft Corporation	Web Files	PKCS #7 Certificate File
.ICS	IronCAD, LLC	CAD Files	IronCAD 3D CAD Drawing File
.DUT	Microsoft Corporation	Data Files	Dutch Localization Language
.CFB	Microsoft Corporation	Data Files	Compound Binary File
.SRC	Unknown Developer	Developer Files	Source Code File
.H1S	Microsoft Corporation	System Files	Windows Assistance Platform Help File