At least one target hash value is generated for a target version of a Web product from contents of a Web page displayed by the target version of the Web product. The target hash value is compared to at least one corresponding baseline hash value generated from a Web page displayed by a baseline version of the Web product. A difference between the target hash value and the baseline hash value indicates a difference between a user interface of the target version of the Web product and a user interface of the baseline version of the Web product. The user interface of the target version of the Web product is generated in response to the comparison between the target hash value and the baseline hash value.