Photoshop is the best digital image editing software in the world, but how to create / open / edit / save an ico file in Photoshop? Ico format is a free Photoshop plugin which gives Photoshop the power to open, edit and save Windows icon (.ICO) files directly, it supports Macintosh OS X and Microsoft Windows XP / Windows 7.
To use Ico format, just download and extract the archive, then copy ICOFormat.8bi to “Plug-Ins\File Formats” folder, then launch Photoshop, now in the open / save dialog, you will see a new line have been added: ICO( Windows Icon )( *.ico, *.cur ). The plugin can create 32-bit icons with 8-bit alpha transparency.
Ico format works on Mac OS X and Windows XP / 7 / Vista, and supports Windows 64-bit.