PSP (Paint Shop Pro Document, .psp)

Paint Shop Pro Document (.PSP) is the native image format of Paint Shop Pro. Paint Shop Pro is a bitmap graphics editor and vector graphics editor for computers running the Microsoft Windows operating system that was originally published by Minneapolis-based Jasc Software. In October 2004, Corel Corporation purchased Jasc Software, and with it, the distribution rights to Paint Shop Pro.

Originally called simply Paint Shop, the first version, 1.0, was released in early 1992. Paint Shop was originally distributed as shareware and is still available at many download sites (4.12 being a popular version), newer versions are only available commercially - a key competitor is Adobe Photoshop, the commercial market leader in this category. Photoshop's popularity is in part because Photoshop is available in an Apple Macintosh version, the platform widely used in the print publication industry, whereas Paint Shop Pro only supports Microsoft platforms. Whilst Photoshop is a popular piece of editing software PSP is also widely used, due to the lower price. Corel announced, on November 28, 2007, that the office that created Paint Shop Pro would be shut down with development moved to offices in California and China.

Paint Shop Pro supports natively both raster and vector graphics. PSP functionality can be extended by Photoshop-compatible plugins. They are listed in the 'Effects' menu, below the built-in effects.