Free Online GeoJSON Polygon Draw Tool
Draw polygons on an interactive map and export as GeoJSON. Click to add vertices, double-click to close the shape. Copy or download GeoJSON. Free, browser-based.
What is Polygon?
A GeoJSON Polygon represents an enclosed area defined by a closed ring of coordinates where the first and last points are identical. It is defined as 'type': 'Polygon', 'coordinates': [[[lng1,lat1], [lng2,lat2], ..., [lng1,lat1]]]. Polygons are used for geographic boundaries, administrative areas, land parcels, satellite imagery AOIs, and region highlighting.
How to draw
To draw a Polygon, select the Polygon mode. Click on the map to add each vertex. An orange preview shows the shape in progress. Double-click to close the polygon. The tool automatically closes the ring by connecting the last vertex to the first.
Common uses
Polygon geometry is fundamental to GIS for representing areas: country and city boundaries, property parcels, satellite imagery areas of interest, flood zones, conservation areas, and any region-based geographic analysis.
GeoJSON output
Each geometry is converted to standard GeoJSON (RFC 7946) format with WGS84 coordinates. Copy or download the output for use in any GIS or mapping application.
All geometry types
This tool supports all 12 geometry types: Point, Polyline, Polygon, Freehand, StraightArrow, DiagonalArrow, DoveTailArrow, DoubleArrow, ClosedCurve, Sector, GatheringPlace, and PlotLineString.
Privacy
All drawing and GeoJSON generation happens entirely in your browser. No data is sent to any server. Your geographic data stays on your device.