> FAVICON_FORGE
Upload one image, get every favicon size a real site actually needs — PNG only, cropped and resized entirely on your machine. Nothing is uploaded anywhere.
> drop an image here, or click to choose one
> WHY SIX SIZES INSTEAD OF ONE
A single 32×32 favicon used to be enough. It isn't anymore: browser tabs, iOS home-screen icons, Android/PWA install icons, and Windows tiles all read from different declared sizes, and a browser that only finds one oversized or undersized option will scale it badly rather than ask for another. 16×16 and 32×32 cover the browser tab itself (32 for high-DPI displays); 48×48 covers older Windows shortcut icons; 180×180 is Apple's specific apple-touch-icon size; 192×192 and 512×512 are the two sizes a PWA manifest actually declares for install icons and splash screens.
This tool skips the legacy .ico container on purpose. Every modern browser accepts a plain PNG via <link rel="icon" type="image/png">, and hand-rolling an ICO file's multi-resolution format isn't worth the added code for a case that's already this well covered.