Convert TopoJSON to KMZ

Convert TopoJSON (.topojson, .json) to KMZ (.kmz) online for free. Fast, accurate geospatial format conversion with CRS reprojection.

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Upload your TopoJSON file and get KMZ output in seconds.

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About TopoJSON

TopoJSON is an extension of GeoJSON that encodes topology, eliminating redundancy and reducing file size. Shared boundaries between features are stored only once.

Extensions: .topojson, .json

Software: D3.js, Mapbox, QGIS, GDAL/OGR, Leaflet

Limitations: Read-only in most GIS software. Requires conversion for editing. Less widely supported than GeoJSON.

About KMZ

KMZ is a compressed (zipped) version of KML files. It packages the KML document along with any referenced images, icons, or overlays into a single archive.

Extensions: .kmz

Software: Google Earth, Google Maps, QGIS, ArcGIS

Limitations: Same as KML (WGS 84 only). Requires extraction to edit the underlying KML.

How to Convert TopoJSON to KMZ

Upload your TopoJSON file (.topojson, .json)
Review detected layers, features, and coordinate system
Select KMZ as your output format
Choose a target coordinate reference system (optional)
Click Convert and download your KMZ file

Frequently Asked Questions

How do I convert TopoJSON to KMZ?

Upload your TopoJSON file to ConvertGeoData, review the detected data, select KMZ as the output format, and click Convert. Your converted file will be ready to download in seconds.

Is the TopoJSON to KMZ conversion free?

Yes! ConvertGeoData offers free conversions for all users. No account required for basic conversions. Sign up for a Pro or Business plan for higher limits.

Can I change the coordinate system during conversion?

Yes. ConvertGeoData automatically detects your source CRS and lets you reproject to any EPSG coordinate reference system during conversion.

What software can open KMZ files?

KMZ files can be opened with Google Earth, Google Maps, QGIS, ArcGIS and more.

Does KMZ support different coordinate systems?

KMZ requires EPSG:4326. ConvertGeoData automatically reprojects your data to the correct CRS.