Turn WKT geometries into TopoJSON. It is converted in your browser, so the file never leaves your device.
Drop WKT 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 WKT 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 WKT to TopoJSON converter is part of this page and runs inside your browser. Your geometries 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.
WKT carries geometry only, with no names or properties. TopoJSON is much smaller than GeoJSON for adjacent regions. WKT is at home in writing a single geometry in a database or script; 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. Each geometry in the file becomes one feature without properties; WKT in a coordinate system other than latitude and longitude is refused. Coordinates are kept exactly (no quantisation) and shared borders are stored once; features without a shape are left out.
WKT writes a geometry as text, for example POINT (30 10) or POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10)). Spatial databases such as PostGIS use it. It describes shape only, without names or other attributes.
Opens in Text editors, PostGIS, QGIS and GIS libraries
WKT 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| WKTWell-known text geometry | TOPOJSONTopoJSON map data | |
|---|---|---|
| Stands for | Well-Known Text | TopoJSON |
| Type | Geometry text | Geographic data |
| Compression | None | None (JSON text, topology-encoded) |
| Introduced | 1999, by the Open Geospatial Consortium | 2012, by Mike Bostock |
| Opens in | Text editors, PostGIS, QGIS and GIS libraries | D3, Mapshaper, QGIS and web mapping libraries |
| Best for | Writing a single geometry in a database or script | Compact boundary maps for the web |
| File extension | .wkt | .topojson |
No. The WKT 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 WKT 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.