Turn TopoJSON map files into GeoJSON. It is converted in your browser, so the file never leaves your device.
Drop TopoJSON files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop TopoJSON files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the GeoJSON, or download everything as one ZIP if you converted several files.
The TopoJSON to GeoJSON converter is part of this page and runs inside your browser. Your map files are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
TopoJSON needs a library to unpack it, and not every GIS tool reads it. GeoJSON is plain JSON that web maps and GIS software read directly. TopoJSON is at home in compact boundary maps for the web; GeoJSON is the usual choice for points, lines and areas on the web.
Every format is read into plain GeoJSON features and written out from there, so coordinates, names and properties carry over wherever the target has a place for them. Every object in the topology is expanded back into ordinary shapes. Coordinates are written longitude first, then latitude, as GeoJSON requires.
TopoJSON is an extension of GeoJSON that encodes shared borders once, as arcs, instead of repeating them in every neighbouring shape. Maps of countries or counties come out far smaller. Libraries such as D3 read it, and many general GIS tools need it converted first.
Opens in D3, Mapshaper, QGIS and web mapping libraries
TopoJSON converterGeoJSON describes geographic features, points, lines and polygons, with their properties as plain JSON. It is the standard format for web maps. Coordinates are in WGS 84 and written longitude first, then latitude, the reverse of how most people say them.
Opens in QGIS, Leaflet, Mapbox, geojson.io, GitHub's map view and most GIS tools
GeoJSON converter| TOPOJSONTopoJSON map data | GEOJSONGeoJSON map data | |
|---|---|---|
| Stands for | TopoJSON | GeoJSON |
| Type | Geographic data | Geographic data |
| Compression | None (JSON text, topology-encoded) | None (JSON text) |
| Introduced | 2012, by Mike Bostock | 2008, by the IETF (RFC 7946), from a community specification |
| Opens in | D3, Mapshaper, QGIS and web mapping libraries | QGIS, Leaflet, Mapbox, geojson.io, GitHub's map view and most GIS tools |
| Best for | Compact boundary maps for the web | Points, lines and areas on the web |
| File extension | .topojson | .geojson |
No. The TopoJSON to GeoJSON conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The values are kept. Anything GeoJSON has no way to express, such as formatting, formulas or nesting, is simplified or left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the TopoJSON file, press Convert and save the GeoJSON. There is nothing to install.
Yes. Files up to 150 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.