GeoPlanner for ArcGIS is a web-based app that helps users create, assess, and share planning designs using the geographic knowledge and tools of the ArcGIS platform. It allows users to bring in their own planning data, sketch design plans, compare alternative designs using dashboards, and enable collaboration throughout the planning process. GeoPlanner incorporates each aspect of a geodesign workflow into a single app so that designers, evaluators, and the public can assess the impacts of various scenarios. The app runs on both desktop and mobile devices with touch-enabled tools, supporting planning and design access from anywhere.