Viewshare is a platform designed to support the work of cultural heritage institutions in their efforts to share data, dynamically visualize their collections and access and discover items. It was developed as a free and open tool for partners of the National Digital Information Infrastructure and Preservation Program. Its central goal is to reveal patterns within collections to lead to new understanding. Viewshare features a simple and intuitive interface and limited requirements for technical skills, and it supports a wide variety of digital collections and metadata types. Its users establish custom metadata, import and enhance collection data and create their own interface to support dynamic and interactive views of their digital collections. The process is illustrated with the Fulton Street Trade Card Collection from the Brooklyn Public Library.