Free local tool
Voronoi Diagram Generator
Generate bounded Euclidean nearest-site Voronoi cells from seed points with automatic or manual rectangular clipping.
Private by design: inputs and local files stay in this browser tab. The tool sends no input to a server and stores nothing after the page closes.
Clipped Voronoi diagram
Textual cell summary
| Seed | X | Y | Cell vertices |
|---|
JavaScript is required for the interactive tool.
Method and limits
Supports 2-200 unique finite seed points. Each cell begins as the clipping rectangle and is clipped against every pairwise perpendicular-bisector half-plane with epsilon 1e-9. Duplicate seeds and invalid bounds are rejected. Cells are clipped to the displayed rectangular bounds; no maps, GIS, geocoding, routing, or Delaunay output is included.