Abstract: A lightweight organizer with upper and lower trays and receptors for supplies and tools which can be mounted on the top platform of a stepladder. No tools are required in the process. The organizer has four sides extending downward and outwardly and opened on the bottom. It may either be made as single unitary molded plastic structure or its upper tray may be removable from the organizer's lower portion. An interior ledge with a notch in the organizer's apron portion fit on the lower side of the ladder's top platform to firmly secure the mounted organizer to it.