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I3F file extension

The table below provides useful information about the .i3f file extension. It answers questions such as:

  • What is the .i3f file?
  • What program do I need to open a .i3f file?
  • How can the .i3f file be opened, edited or printed?
  • How can I convert .i3f files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

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

✅ I3 Fax Document

I3F file is an I3 Fax Document. I3F is a proprietary file format that contains faxes.
Category: Graphic files
Application: Interaction Fax
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
I3F aliases:
I3F related links:
I3F related extensions:

Other types of files may also use the .i3f file extension.

🚫 The .i3f file extension is often given incorrectly!

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

i3, i3d, ief, if, irf

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

iCE CFR Raw Data
ISIS Control File
Modula-3 Interface Source Code
Houdini 3D Texture
Image Exchange Format Bitmap File
IFWin Project File

🔴 Can't open a .i3f file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .i3f file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .i3f file extension, write to us!

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