Disclosed are various embodiments for item categorizer. The item categorizer is configured to parse, in at least one computing device, at least a plurality of product descriptions of a like item category for identifying a plurality of keywords with regard to the like item category. Furthermore, the item categorizer selects a plurality of subsets of keywords from the plurality of keywords, each subset of keywords comprises a unique combination of the plurality of keywords with respect to each other. Moreover, the item categorizer is configured to generate a respective rule for each corresponding subset of keywords, wherein an application of each respective rule specifies a respective binary result depending upon whether the corresponding subset of keywords is included in a seller product description.