Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .ef3

0 extension(s) and 1 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .ef3 file?
  • Which program can create the .ef3 file?
  • Where can you find a description of the .ef3 format?
  • What can convert .ef3 files to a different format?
  • Which MIME-type is associated with the .ef3 extension?
.efx
eFax Document .efx file icon

eFax Document

EFX file is an eFax Document. eFax is a service of j2 Global Communications that allows users to receive and send fax documents in digital format (e.g., in email).
Category: Document files
Application: eFax Messenger
Program name: -
Mime-type: image/efax
Magic bytes (HEX): -
Magic string (ASCII): -
Aliases:
ef3, efax
Links:
-
Related extensions:
G3 FAX Image
FlashPix Image
Tag Image File Format
Microsoft Fax Image
Ability Photopaint Image
Red Storm Bitmap Image
Canon Navigator Fax
WinFax Document
TIFF Separator Page

Other types of files may also use the .ef3 file extension. If you have helpful information about .ef3 extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Think3 Thinkdesign CAD Document
Team Manager 2 Meet Export File
Altair FEKO Electric Field Strengths Data
Esoteria Game Data
SmartWare Runtime Project
Encryptafile Private Key
Epson Print CD v3 Project
Omnis Native Data File
Elixir DesignPro Tools New Form

The .ef3 filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

e3 (1), rf3 (1), et3 (1), efr (1), ef (1), ec3 (1), ev3 (1), efw (1), efe (1), ed3 (1)

Can't open a .ef3 file?

If you want to open a .ef3 file on your computer, you just need to have the appropriate program installed. If the .ef3 association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.ef3

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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