Multi-resolution export (app icons)
Upload a single image (ideally square and high resolution) to automatically generate all the standard icon sizes required by iOS and Android, bundled in a ready-to-use zip file.
How it works
Publishing an app on the App Store or Play Store requires providing the icon in many different sizes (home screen, settings, notifications, store listing...). Instead of manually resizing an image dozens of times, this tool applies Lanczos3 resizing to each required standard size, then bundles all the generated PNG files into a single downloadable zip archive.
Which source image should I use?
Use a square image of at least 1024×1024 pixels with no unnecessary margin, matching the final design of your icon: the generated sizes are only reductions of this source, and no extra detail is created for the larger sizes.
Does the zip contain folders organized like Xcode/Android Studio?
No, the archive contains a flat list of PNG files explicitly named by platform and size (for example ios-120-120x120.png), and it's up to you to place them in the folder structure or asset catalog (Asset Catalog / mipmap) your project expects.
100% local processing: every resize and the zip creation happen entirely in your browser via WebAssembly — your image is never sent to a server.