GUI testing is the process of ensuring proper functionality of the graphical user interface (GUI ) for a given application and making sure it conforms to its written specifications.

In addition to functionality, GUI testing evaluates design elements such as layout, colors, fonts, font sizes, labels, text boxes, text formatting, captions, buttons, lists, icons, links and content. GUI testing processes can be either manual or automatic, and are often performed by third -party companies, rather than developers or end users.