Turn GPX tracks into TopoJSON. It is converted in your browser, so the file never leaves your device.
Drop GPX 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 GPX 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 TopoJSON, or download everything as one ZIP if you converted several files.
The GPX to TopoJSON converter is part of this page and runs inside your browser. Your tracks 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.
GPX is verbose XML and has no place for extras such as heart rate unless an extension is used. TopoJSON is much smaller than GeoJSON for adjacent regions. GPX is at home in GPS tracks, routes and waypoints; TopoJSON is the usual choice for compact boundary maps for 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. XML that declares custom entities is refused, and GPX files are parsed without touching the network. Coordinates are kept exactly (no quantisation) and shared borders are stored once; features without a shape are left out.
GPX is the open XML format for GPS data and the common language of hiking, cycling and running apps. It records waypoints, planned routes and recorded tracks with time and elevation. Almost every GPS device and app can import and export it.
Opens in Garmin BaseCamp, Strava, Komoot, Google Earth, QGIS and nearly every GPS app
GPX converterTopoJSON 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 converter| GPXGPX track file | TOPOJSONTopoJSON map data | |
|---|---|---|
| Stands for | GPS Exchange Format | TopoJSON |
| Type | GPS track data | Geographic data |
| Compression | None (XML text) | None (JSON text, topology-encoded) |
| Introduced | 2002, by TopoGrafix | 2012, by Mike Bostock |
| Opens in | Garmin BaseCamp, Strava, Komoot, Google Earth, QGIS and nearly every GPS app | D3, Mapshaper, QGIS and web mapping libraries |
| Best for | GPS tracks, routes and waypoints | Compact boundary maps for the web |
| File extension | .gpx | .topojson |
No. The GPX to TopoJSON 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 TopoJSON 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 GPX file, press Convert and save the TopoJSON. 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.