Disclosed are various embodiments for a catalog mapping tool application. The application is executable in at least one computing device and comprises logic that identifies a system catalog of an item and a user catalog of the item. The system catalog may include a system acceptable format for a value of an attribute associated with the item, and the user catalog may include a user defined format for the value of the attribute associated with the item. The application further comprises logic that receives a selection of one of a plurality of recommended metadata maps for translation from a client device associated with the seller. In addition, the application comprises logic that facilitates translating the user catalog to the system catalog based at least in part on the one of the plurality of recommended metadata maps.