How to generate an app icon set

Create every icon size you need from a single source image — for a web app (favicons), iOS, or Android. Processed in your browser, nothing uploaded.

Steps

1. Choose a square image. Use the highest resolution you have (1024×1024 px or larger) for crisp results at every size.
2. Generate icon set (ZIP). You'll get PNGs at common sizes — 16, 32, 48, 64, 76, 120, 152, 167, 180, 192, 256, 512, and 1024 px — named icon-<size>x<size>.png.

Tip: provide an image that already has the padding/shape you want, since icons are scaled, not cropped.