Computer ScienceData StructureMultimedia FormatsImage FormatICOOn this pageICO ↔ Windows OS desktop icon, for Browser as favicon.ico aka ICO, Microsoft-Windows-Icon, MS-Windows-Icon, Windows-Iconsupports up to 256x256 pixelFaviconFavorite Icon. Tiny 16x16 px GIF/PNG/ICOReferencesFavicon ↔ Favorite Icon. Tiny 16x16 px GIF/PNG/ICO