The Urban Nature Navigator is a tool that helps users to assess the potential contributions of nature-based solutions to meet various urban sustainability challenges. It generates information on how different types of nature-based solutions benefit ecological, socio-cultural and economic factors. Users can explore how a specific nature-based solutions can contribute to address urban sustainability challenges. Together with the involvement of diverse stakeholders, the tool can be used to create an estimate of how a particular urban development idea could contribute to address urban sustainability challenges., and support users in identifying which types of nature-based solutions can help meeting key priorities.