platform,purpose,size_px,format,reference,notes
Web,Classic favicon (multi-size .ico),"16, 32, 48",ICO,favicon.ico,served at site root; browsers pick a size
Web,PNG favicon,16,PNG,"<link rel=""icon"" sizes=""16x16"">",
Web,PNG favicon,32,PNG,"<link rel=""icon"" sizes=""32x32"">",most-used tab size
Web,PNG favicon (high-DPI),48,PNG,"<link rel=""icon"" sizes=""48x48"">",
Web,Safari pinned tab,16 (vector),SVG,"<link rel=""mask-icon"">",monochrome SVG
Apple,apple-touch-icon (current),180,PNG,"<link rel=""apple-touch-icon"">",iPhone home screen @3x; no transparency
Apple,apple-touch-icon (iPad Pro),167,PNG,apple-touch-icon-167x167.png,
Apple,apple-touch-icon (iPad),152,PNG,apple-touch-icon-152x152.png,
Apple,apple-touch-icon (older iPhone),120,PNG,apple-touch-icon-120x120.png,
PWA,Manifest icon (min),192,PNG,manifest icons[],required for installability
PWA,Manifest icon (splash/large),512,PNG,manifest icons[],required for installability
PWA,Maskable icon,"192, 512",PNG,"purpose:""maskable""",keep content in the 80% safe zone
Android,Adaptive icon canvas,432,PNG/vector,ic_launcher (foreground+background),108dp @ xxxhdpi; 66dp safe zone
Android,Legacy launcher mdpi,48,PNG,mipmap-mdpi,48dp baseline
Android,Legacy launcher hdpi,72,PNG,mipmap-hdpi,
Android,Legacy launcher xhdpi,96,PNG,mipmap-xhdpi,
Android,Legacy launcher xxhdpi,144,PNG,mipmap-xxhdpi,
Android,Legacy launcher xxxhdpi,192,PNG,mipmap-xxxhdpi,
Android,Play Store listing icon,512,PNG (32-bit),Play Console,no transparency
iOS,App icon (App Store),1024,PNG,AppIcon (Marketing),no alpha; Xcode generates the rest
iOS,App icon iPhone @3x,180,PNG,AppIcon 60pt @3x,
iOS,App icon iPhone @2x,120,PNG,AppIcon 60pt @2x,
iOS,App icon iPad Pro,167,PNG,AppIcon 83.5pt @2x,
iOS,App icon iPad,152,PNG,AppIcon 76pt @2x,
macOS,App icon set,"16, 32, 64, 128, 256, 512, 1024",PNG (.icns),AppIcon,each @1x and @2x
Windows,PWA/Store tile (small),71,PNG,manifest / Store,
Windows,PWA/Store tile (medium),150,PNG,msapplication tile,
Windows,PWA/Store tile (large),310,PNG,wide/large tile,
Windows,browserconfig tile,144,PNG,msapplication-TileImage,
Windows,App icon (.ico),"16, 24, 32, 48, 256",ICO,app resource,
Chrome Web Store,Extension icon,128,PNG,manifest icons 128,store + toolbar source
Chrome extension,Toolbar action icon,"16, 32, 48",PNG,action.default_icon,