EFX File

What are EFX files and how to open them

Are you having problems opening an EFX file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your EFX files.

What is an EFX file?

EFX files have multiple uses, and eFax Document is one of them. Read more about the other uses further down the page.

eFax Document

Files that contain the .efx file extension are most commonly associated with the eFax fax messaging software program. eFax is a digital faxing application that allows users to send and receive fax transmissions via email or the online eFax Internet interface.

When the eFax application creates a fax document, the file is saved to the user's computer with the .efx extension. These files can contain the body of the email that was sent via fax as well as any attachments that the fax may have included.

EFX files can be converted into PDF or TIF files using the eFax Messenger application.

How to open EFX files

We have identified one EFX opener that is compatible with this specific type of EFX file.

Programs that open eFax Document files

Last updated: February 24, 2023

All known file formats using extension .EFX

While eFax Document is a popular type of EFX-file, we know of 2 different uses of the .EFX file extension. Different software may use files with the same extension for different types of data.

OpenAL Effects Extension

We know that one EFX format is OpenAL Effects Extension. We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

EFX opener for Windows

We have identified one EFX opener that is compatible with this specific type of EFX file.

Various apps that use files with this extension

These apps are known to open certain types of EFX files. Remember, different programs may use EFX files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about EFX file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.