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GeoJSON Validator

Validate GeoJSON objects against the GeoJSON specification. Checks feature, geometry, point coordinates, FeatureCollection structure, and bounding box format. Code never leaves your device — formatting and validation run locally in your browser.

100% Local Browser Native

How to Use the GeoJSON Validator

1. Paste the GeoJSON document

Full FeatureCollection per RFC 7946 — coordinates in longitude, latitude order.

2. Read geometry errors

Unclosed rings, wrong winding, and out-of-range coordinates flagged per feature.

3. Fix and revalidate

Correct flagged features and run again until the document validates clean.

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Frequently Asked Questions

Which spec?

RFC 7946 — the current GeoJSON standard, enforced strictly here.

Geometries covered?

Point, LineString, Polygon, Multi* variants, and FeatureCollections.

Classic mistake?

Coordinate order — GeoJSON is longitude-first, opposite of most maps UIs.

Is my input uploaded anywhere when using GeoJSON Validator?

No — validation runs locally in your browser, free with no signup.

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Last updated October 2026