Edit KMZ files online
Open and edit KMZ polygon files in your browser. Change vertices, repair geometry and export the result without installing desktop GIS software.
Read guide →Online GeoJSON polygon editor
Draw, inspect, edit, validate and repair GeoJSON Polygon and MultiPolygon geometry directly in your browser.
Read guide →Merge polygons online
Combine overlapping or adjacent polygon features in your browser and export the merged result as GeoJSON, KML, KMZ or other GIS formats.
Read guide →Split a polygon online
Cut a polygon into separate parts using a line in a browser-based GIS editor, then validate and export the results.
Read guide →Repair invalid polygon geometry
Identify and repair common polygon geometry problems such as unclosed rings, self-intersections and invalid MultiPolygon structures.
Read guide →About these guides
These pages describe workflows available in EditPolygon and the underlying GIS concepts needed to use them responsibly. They are written for focused browser-based editing, not as a replacement for full desktop GIS documentation.
Geometry software can produce technically valid but operationally incorrect output. Keep original files and verify important results in the system where they will be used.