WIF is a file format used by programs mainly related to the textile industry. WIF files contain a special graphic format that stores data about the weaving method of a given product. It is a template made of matrix-like cells. Some of the cells constitute the matrix (longitudinal threads) and others are the so-called weft (cross threads). These cells are colored in an appropriate way to form a fabric pattern.

WIF is an inter-application exchange format used to design fabric patterns.