Thanks Mark! Exactly, handling all sizes manually is a pain. In my tool, when a user uploads a single high-res PNG, the backend uses [ImageMagick / GD Library / Sharp] to resize it into all required dimensions (16x16, 32x32, 180x180, etc.), generates the .ico bundle and site.webmanifest file automatically, and packs them into a single ZIP download.
Mark Reeves
browser tools, file formats, open source
favicons are the perfect example of a conversion nobody thinks about until launch day - png to ico with all the sizes, apple touch icons, the manifest. how are you handling the multi-size generation, single upload fanning out to all formats?