Save every image inside a macOS .icns as a transparent PNG, Retina sizes included. Need a Windows icon instead? Use ICNS to ICO.
Only want to look inside? Open the file in the ICNS File Viewer.
A Mac icon holds the same picture at several sizes, from 16 px for Finder lists up to 1024 px for Retina screens.
Each size becomes its own PNG, named by its size, so you can pick exactly the one you need.
On a Mac, right-click the app in Finder and choose Show Package Contents. The icon is in Contents > Resources, usually named AppIcon.icns.
Copy it out first - changing files inside an app can break it.
Drop your .icns into the box and press Convert. Every size inside is saved as its own PNG - more than two come as one ZIP.
No. The ICNS is read and converted in your browser, on your device. Nothing is uploaded.
Yes. Press Largest above the size list, or untick the sizes you do not need.
Yes. Mac icons are transparent around the shape, and every PNG keeps that. Want a solid background? Pick the White background preset.
They are JPEG 2000 images, which only Safari can decode. The other sizes still work, and Safari reads all of them.
Use PNG to ICNS - it builds every macOS size from one image.
