Free · Local file processing · No account

Repair Geometry Online

Fix supported coordinate and ring problems and inspect the remaining issues before exporting.

Loading the local file tool…

How to use this tool

1. Load a dataset or use the working example.
2. Review fields, geometry issues or split groups, then run the operation.
3. Download the output and report; keep the original file for comparison.

Limits and checks before sharing

Automatic repair is deliberately limited. It cannot infer missing coordinates or the intended shape of a self-intersecting polygon. Unresolved issues remain visible.
Review the repair report and visually compare boundaries; this is not a complete GIS MakeValid implementation.

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

Can this repair every invalid polygon?

No. Supported deterministic fixes are reported explicitly. Ambiguous shapes require manual editing or a desktop GIS. Do not treat a downloaded file as proof of valid topology.

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.