Excel to TopoJSON Converter
Convert Excel (.xlsx) files to TopoJSON (.topojson) right in your browser — free, instant and private. Drop a file below and download the result in seconds. Nothing is uploaded to a server, so your data never leaves your device.
Drag & drop your .xlsx file
or click to browse
How to convert Excel to TopoJSON
- 1
Add your Excel file
Drag and drop your .xlsx file onto the box above, or click to browse.
- 2
Convert in your browser
GeoMaps reads the Excel and rewrites it as TopoJSON locally, on your device. The conversion is instant and your file is never sent anywhere.
- 3
Download your TopoJSON
Click download to save the converted .topojson file, or copy the output text. That's it — no account, no watermark, no limits.
Excel workbooks (.xlsx, and legacy .xls) are where most location lists start life — customer lists, store addresses, site inventories and survey results. For mapping, each row is one place with latitude and longitude columns plus any attributes you want to keep. Converting between Excel and GIS formats lets you send a spreadsheet to Google Earth or GIS software, or pull mapped data back into a workbook for reporting.
Need the other direction instead? TopoJSON is a compact GeoJSON extension that encodes shared topology. TopoJSON is an extension of GeoJSON that encodes topology: shared boundaries between features are stored once as 'arcs' instead of being duplicated. The result is dramatically smaller files — often 80% smaller than the equivalent GeoJSON — which makes it popular for web visualizations (notably D3.js) where download size matters. It converts losslessly back to GeoJSON for editing.
Excel files are read from the first worksheet, and each row needs latitude/longitude columns (or a WKT geometry column). On export, points get longitude/latitude columns and lines or polygons are written to a geometry column as WKT.
What is Excel?
.xlsxExcel workbooks (.xlsx, and legacy .xls) are where most location lists start life — customer lists, store addresses, site inventories and survey results. For mapping, each row is one place with latitude and longitude columns plus any attributes you want to keep. Converting between Excel and GIS formats lets you send a spreadsheet to Google Earth or GIS software, or pull mapped data back into a workbook for reporting.
What is TopoJSON?
.topojsonTopoJSON is an extension of GeoJSON that encodes topology: shared boundaries between features are stored once as 'arcs' instead of being duplicated. The result is dramatically smaller files — often 80% smaller than the equivalent GeoJSON — which makes it popular for web visualizations (notably D3.js) where download size matters. It converts losslessly back to GeoJSON for editing.
Excel to TopoJSON — FAQ
- How do I convert Excel to TopoJSON?
- Upload your .xlsx file using the converter above (drag & drop or click to browse). GeoMaps converts it to TopoJSON instantly in your browser and gives you a .topojson file to download. No software to install and no signup required.
- Is the Excel to TopoJSON converter free?
- Yes — it's completely free with no usage limits, watermarks or account needed. We offer it as a free tool from GeoMaps, the platform for turning your data into interactive maps.
- Is my data private? Are my files uploaded to a server?
- No. The conversion runs entirely in your web browser using JavaScript — your file is never uploaded to any server. Because nothing leaves your device, it's safe for sensitive or confidential data and works even offline once the page has loaded.
- Can I convert TopoJSON back to Excel?
- Yes. Use our TopoJSON to Excel converter for the reverse conversion — every format on GeoMaps converts both ways.
- Anything to know about Excel input?
- Excel files are read from the first worksheet, and each row needs latitude/longitude columns (or a WKT geometry column). On export, points get longitude/latitude columns and lines or polygons are written to a geometry column as WKT.
- How large a file can I convert?
- Because conversion happens in your browser, the limit is your device's memory rather than a server quota — files up to tens of megabytes convert comfortably on a typical laptop. Very large datasets may be slower depending on your machine.