Visualize, plot, and validate Well-Known Text (WKT) geometries directly in your browser. Paste WKT polygons, lines, and points, inspect coordinate arrays, convert to GeoJSON, reproject EPSG spatial reference systems (EPSG:4326, EPSG:3857, EPSG:6451), and export to PostGIS WKB/EWKB — 100% client-side with zero installation.
Spatial-Sandbox parses all standard OpenGIS Simple Features Specification (SFS) WKT geometry types:
Click Load in Map to test any of these WKT geometries immediately:
POINT(2.2945 48.8584)
LINESTRING(-122.4786 37.8100, -122.4783 37.8199, -122.4780 37.8300)
POLYGON((-73.9731 40.7644, -73.9579 40.7972, -73.9818 40.8005, -73.9819 40.7681, -73.9731 40.7644))
POLYGON((-0.18 51.50, -0.14 51.50, -0.14 51.52, -0.18 51.52, -0.18 51.50), (-0.17 51.505, -0.15 51.505, -0.15 51.515, -0.17 51.515, -0.17 51.505))
MULTIPOLYGON(((-0.178 51.503, -0.153 51.503, -0.153 51.512, -0.178 51.512, -0.178 51.503)), ((-0.145 51.500, -0.138 51.500, -0.138 51.506, -0.145 51.506, -0.145 51.500)))
Switch to GeoJSON mode for parsing, styling, and measuring GeoJSON Features and FeatureCollections.
Troubleshoot invalid WKT syntax, polygon ring closure errors, and nested coordinate arrays.
Need to understand the OGC Simple Feature Access specification, coordinate dimensions (2D, 3D Z, 4D ZM), polygon hole winding order, or how to query spatial databases? Read our comprehensive technical guide: