A small icon that is used by some browsers to identify a bookmarked Web site.
The display size of a favicon in the Favorites list is 16×16. Files are recognized by the “.ico” extension. Special applications are available to create this type of file. (see below) Once created, the favicon.ico file is placed in the root folder of the Web site.
Favicons are most likely to be found at large, well-branded sites such as portals and media companies. When only a few sites in a long bookmark list are using a custom image, the exceptions are very prominent.
offers a java-based icon generator.
The Dastardly ‘favicon.ico not found’ Error
lindacole.com (August 3, 1999)