TopoJSON to GeoJSON
Convert TopoJSON to GeoJSON in your browser — free, no upload, no sign-up.
Processing and data safety
Section titled “Processing and data safety”This tool runs entirely in your browser — your files are never uploaded to a server.
Input and output
Section titled “Input and output”- Formats: TopoJSON, GeoJSON
- Flow: TopoJSON → GeoJSON
How to use
Section titled “How to use”- Drop your .json/.topojson file into the input (or use “or load a file”), or paste the TopoJSON (a sample is pre-filled).
- Click “Convert to GeoJSON” (or press Ctrl/⌘+Enter).
- Check the converted-object summary and the map preview, then download the .geojson.
Key details and limits
Section titled “Key details and limits”- Converts the first object in the Topology only — the success summary shows the selected object name and the total count; split multi-object files first.
- Large files are bounded by browser memory.
- Output coordinates keep the source TopoJSON’s quantization precision.
Common use cases
Section titled “Common use cases”- Drop or paste TopoJSON → get GeoJSON (the success state names the converted object)