In recent years, the development of cities and urban areas in Serbia has been based on large-scale projects aimed at transforming inadequately regulated, abandoned, devastated, or empty locations, especially in major cities. This trend, although directly spatially focused to certain locations within the city, has much broader consequences for the city and its inhabitants, reflected in changes in the quality of life and the environment in cities, traffic, housing accessibility, cultural and visual identity of the city, etc. Additionally, contemporary processes in urban development, characterized by weakened planning processes and the absence of strategic and long-term planning for future development, have been replaced by partial planning and project design. Characteristics of this planning and development management approach include the usurpation and misuse of public space and public interest, abuse of planning and plans as instruments for implementing private and other interests, along with a lack of transparency, democracy, and citizen participation, which would ensure the legitimacy of proposed planning and project solutions. On the other hand, with the development of information technologies, numerous opportunities arise for more efficient and successful urban development management. In this regard, city development focuses on accelerated digitalization in various development areas, including urban development and future city planning. In such an atmosphere, where pressure from private interests and large capital on the planning system in Serbia exists on one hand, and the desire to modernize and digitize society on the other, the question arises of how modern information technology tools, primarily GIS, can help overcome the problems facing urban planning practice today. This paper will present a platform based on Web GIS technology and the possibilities of its application in spatial development management. Using a specific example, it will demonstrate how GIS can help present spatial and urban planning solutions in a spatial context, adequately visualize them, and communicate them to a wider audience, all for the purpose of increasing transparency and reducing misuse of planning solutions and processes.