.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

	Internet Explorer by Microsoft Corporation
	Apple Safari by Apple
	Mozilla Firefox by Mozilla
	Apple Keychain Access 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
.XSB	Microsoft Corporation	Audio Files	XACT Sound Bank
.CPI	Sony	Video Files	AVCHD Video Clip Information
.DL	Microsoft Corporation	Game Files	Zoo Tycoon 2 Data File
.WWS	Microsoft Corporation	Settings Files	Microsoft Works Wizards File
.HQZ	Microsoft Corporation	Data Files	Internet Explorer For Mac File
.MP4	Moving Picture Experts Group	Video Files	MPEG-4 Video File
.WEBLOC	Apple	Web Files	Mac OS X Website Location
.866	Microsoft Corporation	Data Files	Visual FoxPro 98 Data
.GRB	Microsoft Corporation	System Files	MS-DOS Shell Monitor Data
.PFM	Adobe Systems Incorporated	Font Files	Printer Font Metrics File