GeoJSON Viewer & Validator

Paste GeoJSON below to render it on a map and validate the structure. Everything runs locally — your data never leaves the browser.

About the GeoJSON viewer & validator

Paste any GeoJSON and instantly see it drawn on an interactive map, with a structural check and summary statistics. It accepts a full FeatureCollection, a single Feature, or a bare geometry, and reports feature count, geometry types, total polygon area and the bounding box.

How to use it

  1. Paste your GeoJSON into the box (or click Load sample).
  2. Click Render & Validate.
  3. Click any feature on the map to see its properties.

Frequently asked questions

What coordinate order does GeoJSON use?

GeoJSON is always [longitude, latitude] (x, y) in WGS84, per RFC 7946. A common bug is swapping the two — if your points land in the wrong place, check the order.

How is area calculated?

Polygon area is computed geodesically on the WGS84 ellipsoid and reported in m² or km².

Is my GeoJSON uploaded?

No. Parsing, validation and rendering all happen locally in your browser.