The Azgaar's Fantasy Map Generator is a web-based tool that generates customizable fantasy maps in various formats, including GeoJSON and JSON. The tool uses a pop-up window to download files and can be used to create maps with different features, such as political boundaries, religions, and geography. The generator also allows users to export maps in different formats and save them for later use. The tool is built using vanilla DOM manipulation and jQuery, and its codebase is available for viewing.