IcoMaker

macOS / developpeurs

With IcoMaker,
(1) you can display ICO files,
(2) you can save selected image as a PNG / TIFF file, and
(3) you can make and edit ICO files.

An ICO file can have various size of images in it. But, kinds of images that IcoMaker (Ver.1.3.0) can display and can pack into ICO files are as follows. Each image can have transparent part, but can't use semi-transparent colors.

16-color images: 16x16, 32x32, 48x48 (pixels)
256-color images: 16x16, 32x32, 48x48 (pixels)

Note that ICO files containing images of sizes other than the above or full-color images cannot be displayed or created.