Convert TopoJSON to CSV

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

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Upload your TopoJSON file and get CSV 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 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.

Extensions: .csv

Software: Excel, Google Sheets, QGIS, Python/Pandas, R

Limitations: No built-in geometry type — requires coordinate columns. No CRS metadata. No support for complex geometries without WKT.

How to Convert TopoJSON to CSV

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

Frequently Asked Questions

How do I convert TopoJSON to CSV?

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

Is the TopoJSON to CSV 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 CSV files?

CSV files can be opened with Excel, Google Sheets, QGIS, Python/Pandas and more.