Home : File Types : IFF File

.IFF File Extension

File TypeInterchange File Format

DeveloperElectronic Arts
3.6 (18 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a IFF file?

An IFF file is a universal file format created by Electronic Arts. It may contain image, text, or audio data and is used for interchanging different types of data across applications and platforms. IFF files are supported by many programs and are used as the basis for several other file formats, including AIFF.

More Information

IFF files are comprised of sections of data called "chunks," which are defined by four-letter IDs. There are three main chunk types, each of which may contain text, numerical data, or raw data:

  • FORM: specifies the format of the file
  • LIST: includes the properties of the file
  • CAT: contains the rest of the data
The IFF format is also known as "EA IFF 1985" since Electronic Arts designed the file format in 1985.

NOTE: IFF files used by The Sims and The Sims Online can be edited using IFF Snooper for the Mac platform or IFF Pencil for Windows.

Open over 300 file formats with File Viewer Plus.
Programs that open IFF files
Adobe Audition CC 2015
Apple QuickTime Player
Corel PaintShop Pro X9
ACD Systems Canvas X 16
ACD Systems ACDSee 19
Cloanto Amiga Forever
Adobe Audition CC 2015
Apple QuickTime Player
ShedWorx Smart Converter
Cloanto Amiga Forever
Cloanto Amiga Forever
File Viewer for Android
Updated 7/26/2016

.IFF Extension Information

This page contains information about the file extension IFF and its known file associations. Our goal is to help you understand what a *.iff file is and how to open it.

The Interchange File Format file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

If you would like to suggest any additions or updates to this page, please let us know.