SketchUp is a 3D modeling program optimized for a broad range of applications such as architectural, civil, mechanical, film as well as video game design — and available in free as well as 'professional' versions.

The program highlights its ease of use, and an online repository of model assemblies (e.g., windows, doors, automobiles, entourage, etc.) known as 3D Warehouse enables designers to locate, download, use and contribute free models. The program includes a drawing layout functionality, allows surface rendering in variable "styles," accommodates third-party "plug-in" programs enabling other capabilities (e.g., near photo realistic rendering) and enables placement of its models within Google Earth.

In early 2012, Google, the current owner of Sketchup, announced it will sell the program to Trimble, a company formerly known for GPS location services.

SketchUp was developed by startup company @Last Software of Boulder, Colorado, co-founded in 1999 by Brad Schell and Joe Esch.

SketchUp debuted in August 2000 as a general purpose 3D content creation tool, with the tagline "3D for everyone" and envisioning a software program "that would allow design professionals to draw the way they want by emulating the feel and freedom of working with pen and paper in a simple and elegant interface, that would be fun to use and easy to learn, and that would be used by designers to play with their designs in a way that is not possible with traditional design software. It also has user friendly buttons to make it easier to use."