799 Tagged Image File Format for Internet Fax (TIFF-FX) Image (Raster) The Tagged Image File for Fax Extended (TIFF-FX) format is an extension of the TIFF format. New TIFF tags are defined to allow the mapping of Fax-specific attributes commonly associated with black and white fax and colour fax files. Text 1 Digital Preservation Department / The National Archives 02 Feb 2007 01 May 2013 fmt/156 PUID image/tiff MIME tif File extension tiff File extension tfx File extension Has priority over 672 Exchangeable Image File Format (Uncompressed) Has priority over 673 Exchangeable Image File Format (Uncompressed) Has priority over 752 Exchangeable Image File Format (Uncompressed) Has priority over 1099 Tagged Image File Format Is subtype of 612 Tagged Image File Format