.509 File Overview

File Extension: 509
File Type Description: Internet Security Certificate
File Type Developer: Microsoft Corporation
Primary Associated Software: Internet Explorer
Primary Software Developer: Microsoft Corporation

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509

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What is File Extension 509?

Internet Security Certificate files are the most popular type of files to carry the 509 file extension, originally developed by Mozilla for Mozilla Firefox. According to our internal data, Internet Security Certificate files are most popular with users in United States, with a majority of them running Windows 10. A high percentage of these users browse the web using Google Chrome.


Top 509 User Languages

Top 509 File User Browsers

Desktop Friendly?

Yes

Mobile Friendly?

Yes

Most Popular 509 File Countries

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 509 Files

Extension File Type Developer File Category File Type Description
.CER Microsoft Corporation Web Files Internet Security Certificate
.ICX Microsoft Corporation Data Files Remote Call Profiler Summary View
.XHTML Opera Software Web Files Extensible Hypertext Markup Language Document
.T2 RM Education Data Files Textease 2000 File
.APPXBUNDLE Microsoft Corporation Compressed Files Microsoft Windows App Bundle Package
.DOCXML Microsoft Corporation Text Files Microsoft Word XML Document
.DCTX Microsoft Corporation Data Files Microsoft Office IME Open Extended Dictionary
.LDS GNU Project Developer Files Binutils LD Linker Script
.STP Unknown Developer 3D Image Files STEP 3D CAD File
._VWDXSLN110 Microsoft Corporation Data Files Microsoft Visual Studio File


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Compatible with Windows 11, 10, 8, 7, Vista, XP and 2000

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