EarthDesk is a software application for Microsoft Windows and macOS that changes the computer user's desktop image to a constantly updating view of Earth.

The software can be set to update daylight and moonlight coverage on the map, as well as live cloud images which are superimposed onto the map.

The cloud option requires an Internet connection.

Users can choose between various map projections, whether to use a satellite image or political map, and whether to show night time and moonlight.

In addition to centering on a fixed point, EarthDesk can centre on the current position of the Moon or Sun.