GIS
Free TopoJSON to GeoJSON Converter
Decode TopoJSON — the compact topology format used by D3 and many open-data portals — back into a plain GeoJSON FeatureCollection, entirely in your browser.
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Upload a TopoJSON file
Drag & drop a file, or click to browse. Runs locally in your browser.
Why use TopoJSON to GeoJSON?
Useful for everyday business workflows, not just one-off file cleanup.
Designed to be quick, clear, and usable without creating an account.
Connects naturally with Prizma360 workflows for leads, cards, invoices, bookings, and campaigns.
Processing note
Browser tools generate the output locally on your device. Processor tools are designed for temporary upload, isolated processing, download, and cleanup after the job completes.
Frequently asked questions
What if the file has multiple objects?
All objects in the TopoJSON are decoded and merged into one FeatureCollection.