How to validate GeoJSON — feature and geometry checks

Validate GeoJSON structure, count features and inspect bounding boxes locally.

GeoJSON encodes geographic features as JSON — points, lines and polygons with coordinate arrays. Invalid nesting or wrong type fields break map libraries and GIS pipelines.

Tentaco GeoJSON Validator reports type, feature count and geometry stats before you import into PostGIS, Mapbox or custom apps.

Steps

Open GeoJSON Validator in Map & Geo Studio or /use/geojson-validator.
Paste GeoJSON or upload a .geojson file.
Review validation messages — fix type errors and coordinate ring order.
Check feature and geometry counts match expectations.
Use GeoJSON Formatter or Minify for clean exports to your pipeline.

Try it here

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Related guides

GeoJSON Validator — validate map JSON
GeoJSON Formatter — pretty-print map data
Map & Geo Studio online — free in your browser