.EFX File Overview

File Extension:	EFX
File Type Description:	eFax Document
File Type Developer:	j2 Global, Inc.
Primary Associated Software:	j2 Global Communications eFax
Primary Software Developer:	j2 Global, Inc.

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What is File Extension EFX?

The EFX file extension is a eFax Document file developed originally by Valve for Raven Software Star Wars Jedi Knight: Jedi Academy. User statistics infer that these EFX files are popular with users from China and most frequently found on the Windows 10 platform. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.

Associated Developers and Software

	j2 Global Communications eFax by j2 Global, Inc.
	Raven Software Star Wars Jedi Knight: Jedi Academy by Valve
	Quake 3 Arena by id Software

Top EFX User Languages

Top EFX 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
	Linux
	Xbox One
	OS X El Capitan

Other File Types Related to EFX Files

Extension	File Type Developer	File Category	File Type Description
.JFX	j2 Global, Inc.	Raster Image Files	J2 jConnect Fax File
.CBN	j2 Global, Inc.	Uncommon Files	PaperMaster Cabinet File
.001	Smith Micro Software	Backup Files	Split Archive File
.JSD	Jazer Solutions	Data Files	Jazer Data File
.HOT	Electronic Arts	Audio Files	The Sims Audio File
.19	IBM	Data Files	IBM Voice Type Languages Scripts Data File
.ILG	Flexera Software	Data Files	InstallScript Log File
.HD	Shark007	Data Files	VistaCodecs Data
.JWG	Oracle Corporation	Data Files	Java Data
.33	PTC	Data Files	Creo Elements/Pro Versioned Data