.PSD File Extension

Image file created by Adobe Photoshop, a professional image-editing program; may include image layers, adjustment layers, layer masks, annotation notes, file information, keywords, and other Photoshop-specific elements.

Photoshop documents support RGB, CMYK, grayscale, monochrome, duotone, indexed color, Lab color, and multichannel color modes. The color mode can be changed within the Image → Mode submenu.

While PSD files are saved in a proprietary format, they can be opened directly with Apple Preview, which is included with Mac OS X. They can be also opened by the media programs included with Windows 7 if the correct codec, such as the Ardfry PSD codec, is installed. These programs include Windows 7 Photo Viewer, Windows 7 Media Center, and Windows Media Player.