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.topojson,.TOPOJSON (max 100MB)
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TopoJSON is an extension of GeoJSON that uses topological encoding to eliminate shared boundaries and drastically reduce file sizes for dense vector datasets. It is the preferred format for data-heavy cartographic visualizations built with D3.js, but its quantized, topology-dependent structure is not understood by most GIS tools and mapping libraries.
GeoJSON is the universal interchange format that every mapping library, GIS application, and spatial database accepts natively. Converting TopoJSON to GeoJSON flattens the topology back into standard features, making the data immediately usable in tools like Leaflet, Mapbox, QGIS, and PostGIS without specialized decoders.
Yes, GoConvertFile offers free conversion of TOPOJSON to GEOJSON for files up to 100MB. No registration required.
Most TOPOJSON to GEOJSON conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.
GEOJSON is ideal for web mapping, geospatial apis, data interchange. GeoJSON - open standard JSON format for encoding geographic data structures
No, converting TOPOJSON to GEOJSON does not cause additional quality loss — GEOJSON uses lossless compression. However, any artifacts already present in the original TOPOJSON file will persist in the GEOJSON output.
GEOJSON files are typically 2-5x larger than equivalent TOPOJSON files because GEOJSON preserves all pixel data. This is expected and necessary for lossless quality.
TopoJSON is an extension of GeoJSON that encodes topology, sharing boundary arcs between adjacent features to dramatically reduce file size for map data.
GeoJSON is the standard format for web-based geographic data, encoding points, lines, polygons, and feature collections in JavaScript Object Notation.
Reach for TOPOJSON when your priority is web choropleth maps, data visualization, boundary simplification — its efficient compression makes sharing fast and storage minimal.
Reach for GEOJSON when your priority is web mapping, geospatial apis, data interchange — its uncompromising quality ensures every detail is preserved.