A self-intersecting polygon, an unclosed ring, a handful of duplicate features — these are some of the most common reasons a file gets silently rejected or mis-rendered by other GIS software, and they're rarely visible just by looking at the data. Vector Data Repair finds and explains these issues before touching anything, then fixes only what you choose.
Upload only analyzes — nothing changes automatically
The first step is always a report, not a repair. Upload your file and get back a plain-language breakdown of exactly which issues exist and how many features each one affects — no changes happen until you explicitly pick which categories to fix.
9 issue categories checked
Self-Intersecting Geometry
Boundaries that cross themselves — invalid, and many GIS tools will reject or mis-render them.
Invalid Ring Orientation
Outer rings that should run counter-clockwise (holes clockwise) — required by some strict GIS software.
Unclosed Rings
Polygon boundaries that don't end where they start.
Missing Geometry
Features with no geometry at all.
Zero-Area Polygons
Degenerate slivers left behind by digitizing errors.
Duplicate Vertices
The same point repeated back-to-back along a boundary.
Duplicate Features
Exact copies of another feature in the same file.
Mixed Geometry Types
Points and polygons mixed in one layer — reported, not auto-fixed, since choosing which to keep is a real decision.
Out-of-Range Coordinates
Values outside valid lat/lon range — usually a sign of a real CRS mixup, reported rather than guessed at.
The steps
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Upload and review the report
See which of the 9 categories apply to your file, and how many features each affects.
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Choose which categories to fix
Fix all of them, or only specific ones — your choice, not an all-or-nothing operation.
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Review and export
See exactly what changed — including any features that couldn't be repaired and were removed, listed explicitly, never silently dropped.
Have a file with geometry errors to check?
Open Vector Data Repair →