Image Exchange Format

File Format
Name	Image Exchange Format
Ontology	Electronic File Formats Graphics Image Exchange Format
MIME Type(s)	image/ief
Released	1992

Image Exchange Format is a obsolete subformat of TIFF, intended to be used for the transmission of bi-level images, especially fax images, over the (early) internet.

It is defined in RFC 1314 as a subformat of TIFF Class B (which it calls TIFF-B). TIFF Class B is the bi-level TIFF subformat defined in the TIFF 5.0 specification.

It is not to be confused with Exchangeable image file format (Exif).

Specifications

• RFC 1314: A File Format for the Exchange of Images in the Internet
• For the TIFF 5.0 specification, refer to TIFF#Specifications.