App Icon Resizer: 1024x1024 and Android Sizes

Apple's app icon is one 1024 x 1024 px square, and Xcode builds the smaller iPhone and iPad sizes from it. Google Play asks for a different file, a 512 x 512 px PNG, and the launcher icon inside an Android app ships at 48 to 192 px depending on screen density. Starting from one clean 1024 px square means every one of those sizes is a downscale, never an upscale.

Because the canvas is a perfect square, Crop-to-fit is ideal when your art already fills the frame edge to edge, since the 1:1 ratio means nothing gets distorted, only trimmed evenly. If your logo is wider or taller than it is square, choose Fit-inside and add a solid background fill so the icon stays centered with clean padding instead of being stretched. The App Store icon must be fully opaque, with no transparency and no rounded corners of your own, because the store applies the mask. That is why this page exports the 1024 px icon as a 24-bit PNG and fills any transparent area with the background colour you pick.

The set uses the fit mode and background colour chosen above. It does not build adaptive icon layers: those need a separate foreground and background, which Android Studio's Image Asset Studio generates. The Google Play icon alone is quicker on the Google Play icon resizer.

Sources: Apple's Human Interface Guidelines: App icons and Configuring your app icon; Google's Play Console preview assets, screen densities and adaptive icons pages.

Two notes on Apple's side. First, the long list of separate iPhone and iPad icon sizes is optional now: Xcode's documentation says iOS and iPadOS apps can generate every icon variation from a single 1024 × 1024 image, and that is the default for new projects. You can still switch the asset catalog to All Sizes if you want hand-tuned small icons. Second, Apple's current guidelines favour layered icons built in Icon Composer, which picks up the Liquid Glass effects, but they still accept a flattened image. The 1024 PNG from this page is that flattened image.

On the App Store side, a 1024 px icon with an alpha channel fails upload validation with error ITMS-90717, whose message says the icon can't be transparent nor contain an alpha channel. That is why the icon set saves this one file without alpha. For the Android sizes and the adaptive-icon safe zone in more depth, see the guide to Android app icon sizes.