Generate app icons
One square source becomes the full ladder of app icon sizes for the platforms you choose. ConvertICO renders each one, names it the way the store expects, and zips the lot so you can drop them straight into a project.
Drop a square image, or
1024px square is ideal. Rendered on your device, nothing uploaded.
How it works
App stores want a specific ladder of icon sizes, each named a particular way. Pick your platforms and ConvertICO renders the whole ladder from a single square source: the iOS set from the small notification icon up to the 1024 store artwork, the Android mipmap densities plus the Play Store image, and the PWA sizes for an installable web app. Each file is named the way the platform expects and sorted into a folder, then zipped so you can drop it straight into an Xcode or Android project.
Runs entirely in your browser. Your file is never uploaded.