A modern toolkit for spatial data analysis and conversion. Easily check if features are within polygons, convert CSVs to GeoJSON, and more—all in your browser.
🟩
Check Features Within Polygon
Upload a polygon and a set of features (GeoJSON or CSV) to see which features are contained within the boundary.
Go to Checker
🔄
Convert Polygons CSV to GeoJSON
Easily convert a CSV file of polygons to a valid GeoJSON file for mapping and analysis.
Convert Now
🧭
CSV GPS Points to GeoJSON
Convert a CSV of GPS points to a GeoJSON FeatureCollection. Each row becomes a Point feature with all other fields as properties.
Convert GPS Points
⧉
Detect Overlaps
Upload a file with multiple polygons to detect which ones overlap.
Detect Now
⚠
Detect Invalid Geometries
Identify invalid geometries like self-intersections in your GeoJSON files.
Check Geometries