quickgeojson

The Quick Look plugin enables macOS users to preview the contents of GeoJSON and TopoJSON files directly in Finder. When a file is selected, the plugin renders the geographic data as a map, allowing quick visual inspection without opening a separate GIS application. It also interprets the Mapbox simple‑style specification, applying colors and styles to polygons according to the file’s styling metadata.

Installation can be performed manually by building the project in Xcode and placing the generated qlgenerator file into ~/Library/QuickLook, or automatically via Homebrew Cask using the command homebrew cask install quickgeojson. After installation, Finder will display the rendered preview, and the plugin can be reloaded with qlmanage r if necessary.

The tool is targeted at developers, cartographers, and anyone who works with GeoJSON or TopoJSON on macOS and needs a fast way to view spatial data without leaving the file manager. Its support for simple‑style specifications provides basic visual styling, making it useful for quick checks of geometry and attribute information.