GeoJSON Validator — free & private
Paste GeoJSON, or upload a .geojson/.json file to validate polygons and multipolygons. Check rings, holes, duplicates and more with a live map preview.
FAQ
Does this upload my data?
No. Validation runs entirely in your browser for privacy and speed.
What issues are checked?
Ring closure and minimum vertices, zero-length edges, holes outside outers, duplicate rings, self-intersections, orientation (RFC 7946), anti-meridian hints, and lon/lat out-of-range.
Which geometry types?
Polygon and MultiPolygon are fully supported. Feature and FeatureCollection inputs are accepted; the geometry is extracted and validated.
Can I fix problems here?
Use the light fixes panel to close rings, remove consecutive duplicates, drop zero-area rings and enforce RFC 7946 winding. For heavier topology repair and export formats, open the full editor.
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