Everex eFax fax document
File type: Document file
Files with efx file extension can be found as fax documents from Everex eFax program.
Found 3 different file type records with the same efx filename suffix.
File type category:
Document file
Date updated: June 23, 2025
The efx file extension is related to Everex eFax. EFX is one of the three file formats used by the eFAX
These files can be read with free eFax Messenger software form j2 Global.
You can view these documents using eFax Messenger program.
Use compatible tools to export *.efx files to other formats (pdf, tif, doc, jpg, xls, html).
File type category:
Audio and sound file
Date updated: November 10, 2024
The efx file extension is related to the Ensoniq instrument data format.
An American electronics manufacturer, best known throughout the mid-1980s and 1990s.
Seems to be obsolete file format without support from developer.
Use Awave Studio to open *.efx files.
Compatible tools may be able to export *.efx files to other formats.
Apps designed for playing efx files:
Microsoft Windows
File type category:
Game file
Date updated: September 27, 2026
EFX files are game-resource files for Quake 3 Arena, developed by id Software. They contain definitions for effects used by the game's engine.
An EFX file belongs with the other assets of the game or a Quake 3 Arena modification. Such assets may be stored inside a PK3 archive, and the game or modification loads the effect file when its content refers to it.
Quake 3 Arena was released for Microsoft Windows, and the EFX format is a legacy format tied to that game and its modifications rather than a general-purpose interchange format.
Use Quake 3 Arena on Microsoft Windows to load an EFX file as game content. Place it in the correct game or modification directory, or extract it from its PK3 archive if necessary; the game must have content that references the effect.
Because EFX files are game resources rather than user documents, they do not normally open as standalone documents.
EFX files do not have a useful general conversion format. They are definitions specific to Quake 3 Arena and are normally used as supplied.
There is no standard export process that converts an EFX file into a common media or document format.
Software applications that handle other tasks involving efx files:
Microsoft Windows
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