I3F File

What are I3F files and how to open them

Are you having problems opening an I3F 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 I3F files.

What is an I3F file?

An .I3F file is an I3 Fax file.

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open I3F files

Important: Different programs may use files with the I3F file extension for different purposes, so unless you are sure which format your I3F file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested three different I3F openers which you will find listed below.

Last updated: March 10, 2023

Various apps that use files with this extension

These apps are known to open certain types of I3F files. Remember, different programs may use I3F 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 I3F file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.