Does the checker automatically change features?
No. It reports detected issues. Use the repair tool for supported fixes and inspect anything unresolved.
Free · Local file processing · No account
Check Geometry & Topology Online
Locate supported geometry issues before a polygon overlay or a data handoff.
Loading the local file tool…
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
- Checks have an explicit scope; a clean report does not certify a complete topology model. Shared-boundary gaps, parcel coverage and coordinate accuracy need a project-specific GIS workflow.
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.
Review and repair your source dataset
Issue points locate detected problems; they are not your repaired dataset. Load the original dataset into geometry repair or attribute editing, then check it again.