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GEOJSON TOPOJSON
File conversion

Convert GEOJSON to TOPOJSON

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Is it possible to convert GEOJSON to TOPOJSON?
Yes - GEOJSON converts to TOPOJSON.

TopoJSON encodes shared topology and is much smaller for adjacent polygons (e.g. country boundaries). Convert with the topojson/geo2topo Node tool or mapshaper.org. Reversible.

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert GEOJSON to TOPOJSON

Converting a .GEOJSON file to .TOPOJSON lets you open the content in software that prefers the .TOPOJSON format, though some details may change compared with the original. We are still putting together the list of programs that handle .GEOJSON files.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.GEOJSON GeoJSON geospatial data file

A GEOJSON file stores geographic features - points, lines, and polygons with their attributes - as plain JSON text, and it is the standard format for web mapping. To view it on a map…

Open .GEOJSON details →
.TOPOJSON TOPOJSON File

A .TOPOJSON file is a data file used by specific software.

Open .TOPOJSON details →