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GeoJSON Fixer

Normalize Features and close unclosed Polygon rings, then download repaired GeoJSON.

Normalize common structural problems: promote a Feature to a FeatureCollection and close unclosed polygon rings. It does not invent missing vertices or fix topology.

See also: formats & limits · accuracy · privacy

Input

Result

How it works

Paste or choose GeoJSON.
Review detected problems.
Download the normalized, repaired FeatureCollection.

Current limitations

The fixer closes polygon rings and normalizes the root.
It does not guess missing coordinates or repair self-intersections.

Examples

Open ring

A Polygon ring missing a closing coordinate is closed by appending the first position.

Root Feature

A root-level Feature becomes { type: FeatureCollection, features: [feature] }.

Tips

Run validate first if you want a report of issues and which are fixable.
Self-intersections and winding-order policy for complex multipolygons are out of scope for this fixer.