The Cool Suburbs Tool is an innovative online platform launched by the NSW Government to help communities, councils, and planners understand and address urban heat challenges. The tool provides detailed heat vulnerability assessments at the suburb level, combining temperature data, demographic information, and green infrastructure coverage. Users can explore heat hotspots, identify vulnerable populations, and evaluate the potential impact of cooling interventions including tree planting and green infrastructure. The tool supports evidence-based planning for heat resilience and helps prioritize investments in urban cooling strategies. It represents a significant advancement in accessible, data-driven urban heat planning.