Convert PNG to ICO

Start with the largest size you need, at least 256x256, ideally 512x512. FastEdit downscales to standard ICO sizes (16x16, 32x32, 48x48, 256x256). A square aspect ratio is required.

Technically, modern browsers support PNG and SVG favicons. However, favicon.ico is still the universal fallback and is required for full browser compatibility, older browsers, and certain bookmarking scenarios.

Yes, that is the key advantage of ICO. A single .ico file can embed 16x16, 32x32, 48x48, and 256x256 variants. The browser or OS picks the appropriate size for each context (tab icon, bookmark, desktop shortcut).

Yes. ICO supports alpha transparency, so transparent PNGs produce transparent icons. This is important for desktop shortcuts and taskbar icons that appear over various backgrounds.