Techniques are disclosed relating to identifying types of user interface components based on one or more existing user interfaces. The disclosed techniques may include, for example, determining a plurality of visible elements of a graphical user interface, based on user interface code. Additionally, techniques include determining coordinates for bounding boxes for ones of the plurality of visible elements, based on the user interface code. Disclosed techniques may also include grouping the visible elements into at least first and second groups and determining types of elements within the first and second groups. The techniques also include, in response to detecting a match between the types of elements within the first and second groups, determining a similarity metric for the first and second groups based on the coordinates of determined bounding boxes within the first and second groups. In response to the similarity metric meeting a threshold value, the techniques include storing information defining a component type that corresponds to the first and second groups.