Convert geojson to topojson

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Geojson file(s) on your desktop and select Convert with Filestar.

  3. Type convert to topojson in the search box.

  4. Press Convert.

Or let an AI agent do it: filestarcli -i file.geojson -c "convert to topojson" (how).

Let your AI agent convert GEOJSON to TOPOJSON

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Then ask your agent:

“Convert the GEOJSON files in my Downloads folder to TOPOJSON”

Or run it yourself:

filestarcli -i file.geojson -c "convert to topojson"

Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.

Can my AI agent convert GEOJSON to TOPOJSON?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.geojson -c "convert to topojson" on your computer, so your files stay on it.

Using Filestar With AI Agents → · Download SKILL.md

What is the difference between .geojson and .topojson?

Extension
.geojson
.topojson
Category
GIS
GIS
Developer
GeoJSON
Mike Bostock
Description
A GeoJSON file is a format for encoding a variety of geographic data structures using JavaScript Object Notation (JSON). It is a widely used open standard format designed for representing simple geographical features, along with their non-spatial attributes. GeoJSON supports various geographical data types such as points, lines, polygons, and multi-part collections of these types. It is commonly used for storing and exchanging spatial data on the web, as well as within various Geographic Information Systems (GIS).
TopoJSON is a file format for encoding geographic data structures, based on the GeoJSON format. It encodes geometries more efficiently and supports topology, which enables more accurate representations of geographic objects. TopoJSON eliminates redundancy and simplifies data, making it smaller and easier to work with.
MIME Type
application/vnd.geo+json
application/vnd.geo+json

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