Abstract: Runtime inspection of user interfaces a software application is provided. After a given software application launches, a user interface inspection system records any hierarchy of or relationship between user interface components, and records attributes of various UI components contained in an inspected user interface, for example, placement location of individual controls, spacing between individual controls, sizes of controls, coloring for controls, and the like. The user interface inspection system analyzes the attributes of the displayable controls of a runtime user interface against design guidelines developed for the inspected user interface components and produces reports including information about any deviations between the displayable user interface components and the UI design guidelines.