Free · No signup required
GeoJSON Viewer & Validator
Paste any GeoJSON, see it on a map, validate structure, and inspect feature properties — instantly, in your browser.
Leaflet © OpenStreetMap
Made with GeoDataMapper
Free version
- Validate GeoJSON syntax instantly
- Render points, lines, and polygons on a map
- Inspect feature counts and bounding box
- Click features to see properties
With a GeoDataMapper account
- Style by property values (color, size, height)
- Save and share interactive maps with a public URL
- Export styled maps as PNG / HTML embeds
- Run AI commands on your data with GeoAI
Frequently asked questions
Is my GeoJSON uploaded to a server?▾
No. All parsing and rendering happens in your browser. Nothing is sent to GeoDataMapper.
What size files are supported?▾
The free viewer handles files up to about 20 MB comfortably. For larger files, signed-in accounts get worker-based parsing and progressive rendering.
Does it validate against the GeoJSON spec?▾
Yes — we check that the root type is FeatureCollection, Feature, or GeometryCollection, and that geometries parse cleanly. Coordinates outside WGS84 ranges are flagged.
Can I edit GeoJSON here?▾
Edits in the text area re-render on click. For full editing (draw, simplify, snap), use the main app at /geo-ai or /shapefile.