Modern planning paradigms promote the design of walkable neighborhoods. To allow urban designers to understand the consequences of design choices regarding the street network and the allocation of density, program, and amenities, it is imperative to develop new modeling capabilities to facilitate the design of healthy and sustainable urban habitats that promote active mobility. This paper introduces a new, easy-to-use urban design tool called Urbano, which can import and translate urban data into actionable urban design feedback using active mobility simulations. The tool evaluates accessibility and utilization of amenities, streets, and public spaces, introducing two new urban design metrics called Streetscore and Amenityscore while offering an expanded version of the well-known Walkscore. The tool and metrics were tested in a series of test studies.