Will the point always be inside its polygon?
No. A vertex centroid can fall outside a concave polygon or inside a hole. Use it as a vertex summary, not a guaranteed label point.
Free · Local file processing · No account
Generate Centroid Points Online
Turn feature vertices into centroid points while keeping feature attributes.
Loading the local file tool…
Loading the local file tool…
How to use this tool
- 1. Choose a dataset or load the working example.
- 2. Run the analysis and review the reported output count.
- 3. Download GeoJSON and inspect the result in Studio.
Limits and checks before sharing
- Uses the mean of vertices, excluding duplicate ring endpoints. This is not an area-weighted centroid and may lie outside a concave polygon. Dateline-crossing paths are rejected.
- WGS 84 longitude/latitude only; reproject projected data first. Keep the original and inspect known locations in the output.
- Up to 50 MB per file, 2,000 features and 20,000 vertices per layer. Polygon overlays are limited to 10,000 feature pairs. Invalid inputs fail visibly rather than being silently skipped.
If processing fails, check the file extension and source contents. Use a smaller batch if memory runs low. The original files are never overwritten. Inspect known locations and attributes before sharing a result.
Frequently asked questions
Are these calculations local?
Yes. Files and calculations stay in your browser. Page resources require an initial network load. Map previews can request external map tiles. No account is needed.
Continue with your result
Inspect outputs directly using the result button above. Choose a compatible next operation in the result panel to continue locally without downloading again. These related links open a fresh task. Share the downloaded file through your own channels; local files are not published to a hosted URL.
Buffer Points, Lines & Polygons Online
Draw a distance zone around a route, location or area, or inset a polygon for an approximate setback.
Edit Feature Attributes Online
Edit attribute values, add or rename fields, and remove unwanted columns before sharing a GIS dataset.
Convert GeoJSON output to KML for Google EarthCheck GeoJSON structure before publishing