The increasing air temperature in urban areas is transforming the habitability of cities. It is crucial to reconfigure and adapt the design of urban spaces to accommodate the growing population and effectively address climate challenges. Comfort should be a priority in urban environments of the future, while also minimizing dependence on active energy systems. The URBANKEA tool was developed with the aim of facilitating a correct choice of strategies to address comfort in urban areas by organizers and architects. The calculation module ‘ComfyPlace’ allows the design of urban spaces, as well as the correct planning and location of urban elements. This module allows simulations in any location by using interactive maps, incorporating essential variables like climate, occupancy, and necessary technologies to assess thermal comfort in a specific environment. A mesh is employed to simulate outdoor urban space, and users can define this mesh to customize the level of detail as needed. Urban elements such as covers, pavements, and vegetation can be modelled, with all their properties stored in an extensive database. The tool’s calculation engine processes the defined input data, providing users with easily interpretable results. Moreover, the tool allows the user to establish the operational range, considering key variables that enable citizens to achieve optimal comfort levels. Results, including surface temperatures and incident radiation on urban elements and individuals, are presented and made accessible to the tool’s user. These results allow users to identify the technologies needed to improve outdoor comfort, offering a detailed analysis of the variables that influence their characterization. Its user-friendly interface promotes the embrace of inventive solutions for climate change adaptation, emphasizing improvements like increased vegetation, coverings, or better-defined pavements. All with a focus on enhancing energy efficiency and restoring well-being in public spaces.