GeoJSON Viewer Online — Free Interactive Map Explorer | Online Gallery
Render GeoJSON features as interactive 2D maps offline. Render GeoJSON files as interactive 2D maps with feature inspection, zoom, pan, and property sidebar.
What is GeoJSON Map Viewer and what does it do?
The GeoJSON Map Viewer renders GeoJSON feature collections on a 2D canvas map with click-to-inspect functionality.
Supports Points, LineStrings, Polygons, and MultiGeometry types.
- Render GeoJSON Points, LineStrings, and Polygons on a canvas with auto-fit bounds.
- Click any feature to inspect its properties in a side panel.
- Display feature count broken down by geometry type.
- Pan and zoom the canvas map interactively.
How does GeoJSON Map Viewer work?
Parses GeoJSON JSON, computes bounding box, projects WGS-84 coordinates to canvas pixel space using a simple equirectangular projection, and draws each geometry type.
100% private: all processing happens locally in your browser using client-side WebAssembly, WebCrypto, WebAudio, and HTML5 Canvas. Your files are never uploaded to any server.
Who needs GeoJSON Map Viewer?
GIS Developers
Preview GeoJSON output from spatial APIs without a full GIS desktop application.
Data Engineers
Validate geographic feature collections and check coordinate coverage visually.
Supported file formats
GeoJSON Map Viewer (.geojson) opens and processes the following file extensions directly in your browser:
.geojson.jsonHow to use GeoJSON Map Viewer — step by step
- 1
Open GeoJSON
Drop your .geojson or GeoJSON .json file.
- 2
Pan & Zoom Map
Drag to pan across features, scroll to zoom.
- 3
Inspect Properties
Click any feature to see its geometry and metadata.
Frequently asked questions
Does it need an API key?
No, the map renders entirely client-side on Canvas without any map tile API.
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