Icon Set Creator lets you quickly create icon assets for your apps: Just drag your high-resolution artwork (preferably, a PNG file at 1024x1024) into the app's window, chose the target platform, select a directory for exporting the results, and you're set. The currently supported formats are iOS, macOS, watchOS, and iMessage Apps.
Ideally, you would want to have your designer fine-tune each icon size by hand, for best visual results in terms of detail, pixel alignment, etc.
But if you just want to quickly fill all the "buckets" in the AppIcon entry of your asset catalog, this simple tool can help you.
What's new in version 1.1.10: (September 2018)
- Added support for iMessage sticker apps.
Fixed some unreadable labels in the new macOS Mojave's "dark mode".
Ratings and Reviews
Works well, but strips out P3 color profile. Is there a reason for this?
very useful and easy
Excellent app, works as advertised
This app is a huge bargain. (It’s free!) It does properly what certain big-name, very expensive photo-editing apps don’t: easily creates icon sets (including Retina supports) from one large image. Many thanks to the developer for this… it has saved me an enormous amount of time.
Up to six family members will be able to use this app with Family Sharing enabled.