.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

	Mozilla Firefox by Mozilla
	Apple Keychain Access by Apple
	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
.M2P	Moving Picture Experts Group	Video Files	MPEG-2 Program Stream File
.BFC	Microsoft Corporation	Uncommon Files	Windows Briefcase File
.MBSA	Microsoft Corporation	Data Files	Microsoft Baseline Security Analyzer File
.LACCDB	Microsoft Corporation	Page Layout Files	Microsoft Access Lock File
.APPX	Microsoft Corporation	Developer Files	Windows 8 App Package
.DCTXC	Microsoft Corporation	Data Files	Microsoft Office IME Open Extended Dictionary File
.ALX	BlackBerry	Settings Files	BlackBerry Application Loader XML File
.PRE	IBM	Data Files	Lotus Freelance Graphics File
.KOR	Epic Games	Game Files	Unreal Engine Language Localization
.AVI	Microsoft Corporation	Video Files	Audio Video Interleave File