With the file extension IFF media files (mostly pictures) in the so-called Interchange File Format, which was developed by Electronic Arts (EA) and Commodore, marked. The biggest spread was on the Commodore Amiga.
Today, it is a universal format that, with its simple structure and flexibility, is often the basis for other formats.
The format is designed to contain a wide variety of data. It's a wrapper, similar to a container format, but simpler in design. The files can contain audio data, pictures, videos or even texts.
The basic structure consists of chunks, in which the format and the properties are defined, also metadata are possible. A chunk then contains the actual data. These can be textual, raw or numeric.
The Maxis 'DieSims' and 'Sims Online' games use a variation of the IFF format. These can be edited with the Windows program IFF Pencil and the MacOSX program IFF Snooper.
Most often resolving problems with opening IFF files is very simple. Just install an appropriate program that supports such files. All of the listed programs support IFF files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of IFF files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate IFF files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the QuickTime Player applications is not on the list, select "Browse" option in order to manually locate the directory where QuickTime Player has been installed.
Sometimes problems with opening IFF files may not lie with the application itself, but can arise due to other causes, such as: