.EFX File Extension
File Type 1eFax Document
What is an EFX file?
Document created by eFax, a service that sends and receives faxes as document attachments via email; contains email attachment and email body text; can be converted into .PDF or .TIF files using eFax Messenger.
eFax services are available in Plus, Pro, and Corporate versions.
Programs that open EFX files
File Type 2Jedi Knight Effects File
.EFX File Association 2
Effects file used by Star Wars Jedi Knight: Jedi Academy, a Star Wars Jedi game where the player chooses to follow the light or dark side; contains information that describes different effects that occur throughout the game.
The EFX file is used to store information about a variety of effects such as when a lightsaber hits another light saber (saber block), a lightsaber hits a person (creating "blood sparks"), or a lightsaber hits an object (cutting the object). Other effects contained within the EFX file includes explosions and "force" related effects like lightning. The EFX can also be opened and edited to create customized effects.