Convert CSV to TopoJSON
Convert CSV (.csv) to TopoJSON (.topojson, .json) online for free. Fast, accurate geospatial format conversion with CRS reprojection.
About CSV
Comma-Separated Values (CSV) files store tabular data with coordinate columns (latitude/longitude or WKT geometry). A simple, universal format supported by virtually all data tools.
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.
How to Convert CSV to TopoJSON
- Upload your CSV file (.csv)
- Review detected layers, features, and coordinate system
- Select TopoJSON as your output format
- Choose a target coordinate reference system (optional)
- Click Convert and download your TopoJSON file
Frequently Asked Questions
Upload your CSV file to ConvertGeoData, review the detected data, select TopoJSON as the output format, and click Convert. Your converted file will be ready to download in seconds.
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.
Yes. ConvertGeoData automatically detects your source CRS and lets you reproject to any EPSG coordinate reference system during conversion.
TopoJSON files can be opened with D3.js, Mapbox, QGIS, GDAL/OGR and more.