GeoJSON & CSV Map Viewer
Drop a GeoJSON file and see its polygons, lines and points drawn on a real pannable map, or drop a CSV with latitude/longitude columns and get a pin for every row. Click any shape or pin to inspect its properties, color points by a column's value, and auto-zoom to fit the data. Convert CSV points to a GeoJSON file for use in other tools. Everything renders in your browser; the file never leaves your device.
Runs 100% in your browser — your files never leave your device.
Read the full guide to this tool
Notes
- The map engine (Leaflet, about 40 KB) and the map tiles come from public CDNs; the tiles are the only network traffic, and they never contain your data.
- Coordinate columns are auto-detected from common names (lat, latitude, lon, lng, longitude, x, y) and value ranges; you can override the choice manually.
- Very large files work best simplified: tens of thousands of points render fine, but hundred-megabyte boundary files may be slow to draw.
- Runs 100% in your browser — your files and data never leave your device.
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