TopoJSON to GeoJSON converter
To convert TopoJSON to GeoJSON, drop your TopoJSON file in the box below. It converts straight away; press Download to save the GeoJSON. It all happens in your browser, so your file stays on your device.
Convert to
Converted on this device, never uploaded
What changes
| TopoJSON to GeoJSON | What happens |
|---|---|
| Decoded | Shared arcs joined back into lines and polygons, quantized numbers turned back with the transform |
| Objects | Every object; its name is kept as each feature’s folder property |
| Properties and ids | Kept |
| Size | Larger than the TopoJSON: shared borders are written out for each shape |
How to convert TopoJSON to GeoJSON
- Add your TopoJSON. Drop the file in the box, or click to choose it. It becomes GeoJSON straight away.
- Check the result. Look at the preview and the size. The defaults are right for most files.
- Download. Press Download to save the GeoJSON.
Why GeoJSON
Turn a TopoJSON file from D3 or a map download into GeoJSON that QGIS, Leaflet and most tools read.
Questions
TopoJSON stores each shared border once and in whole numbers. GeoJSON writes every shape out in full.
No. It is read and converted in your browser, so your routes and places stay on your device.
No. The conversion happens right in your browser, so your file stays on your device. There is no account to make, either.