100% local — files never leave your device
Convert SHP to TopoJSON
Turn Shapefile (zipped) into TopoJSON instantly in your browser. No upload, no account, and no file ever crosses the network.
About Shapefile (zipped)
Real .shp/.shx/.dbf/.prj/.cpg written in the browser, packaged as a ZIP.
- Field names are truncated to 10 characters and text values to 254 bytes (DBF limits).
- Mixed geometry types are split into one shapefile layer per type.
About TopoJSON
Quantized topology used by D3 and web cartography.
- Export quantizes coordinates and writes one arc per ring; arcs are not deduplicated.
Step by step
How to convert SHP to TopoJSON
- 01
Drop your .zip file
Open the converter and drop the Shapefile (zipped) file — parsing happens locally in a Web Worker, so nothing is uploaded.
- 02
Choose TopoJSON as the output
Pick TopoJSON, reproject to any of 180+ coordinate systems if needed, trim attributes and preview the geometry on a map.
- 03
Download the .topojson file
Save a single file, or convert a whole batch and download everything as a ZIP. Nothing is stored after the download.
SHP to TopoJSON — questions
Is converting SHP to TopoJSON really private?
Yes. The conversion runs entirely in your browser using a Web Worker — the Shapefile (zipped) file is never sent to a server, so it works with confidential data and offline.
Do I need an account to convert SHP to TopoJSON?
No. There is no signup, no email and no install. Open the converter, drop the file and download the result.
What happens to attributes and coordinate systems?
Export quantizes coordinates and writes one arc per ring; arcs are not deduplicated. You can also reproject between 180+ coordinate reference systems or add a custom proj4 definition before writing.
Need the other direction? Convert TopoJSON to SHP