Voronoi diagram generator

Voronoi diagram

Divide a plane into proximity zones around seed points, mapping geographic influence or creating invisible hit-targets. Create a private, publication-ready voronoi diagram directly in your browser without transmitting sensitive rows off-device. Data is processed locally on your hardware with zero server uploads, enabling instant export to SVG, PNG, and Excel data.

Relationshipgeographygeometryproximity

Edit the data, then export.

Everything runs in your browser. Your data is not uploaded.

Data

Paste tab-separated data from Excel or edit the cells directly.

Paste or import table data

Paste a header row, or choose a local CSV/TSV file. Files are read in this browser and capped at 500 rows.

Choose CSV/TSV

Appearance

Chart title

Palette

Width Data labels Gridlines Axes LegendBackground

Preview

Sample preview of the example data. The live chart takes over as soon as you start working.

SVG, PNG, and Excel exports are generated locally in this browser. PowerPoint export is temporarily unavailable while its dependency path is reviewed for a high-severity image parser advisory.

Multi-Variable Correlation & Flow Mechanics

A Voronoi diagram (or Voronoi tessellation) partitions a 2D plane into polygonal cells surrounding specific seed points. Every location inside a given polygon is strictly closer to that cell’s seed point than to any other seed in the dataset. This makes it an ideal tool for mapping catchments, service areas, or nearest-neighbor relationships. As with all Trendalyzer tools, your data is processed entirely locally on your device with no server uploads.

Coordinate & Matrix Data Structure

Format input columns for voronoi diagram with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.

Sample Observation Matrix

| Label | X coordinate | Y coordinate |

Correlation Traps & Analytical Guidelines

Ensure sufficient visual distinction for voronoi diagram marks across standard and high-contrast viewports.
Align text labels horizontally whenever possible to improve cognitive readability for voronoi diagram elements.
Double-check scale boundaries and zero-anchors before exporting voronoi diagram presentation artwork.

Data shape: Label, X coordinate, and Y coordinate columns
Exports: SVG, PNG, and Excel data; PowerPoint export is temporarily unavailable pending dependency review.

How it works

You edit a table in this page. The renderer draws an SVG from those rows in your browser, then you can download SVG, PNG, or Excel data. The table is not uploaded to any external processing server.

Frequently asked questions

Why do interactive charts use invisible Voronoi cells?

In interactive charts, Voronoi cells are placed as invisible hit-targets over scatter points to make hovering small dots effortless on mobile and desktop.

Bubble chartCompare two numeric dimensions while encoding a third by marker size.Open Connected scatterplotFollow the evolution of two variables over time as a single connected line.Open HeatmapCompare values across two categorical dimensions using color and a readable matrix.Open Hexbin chartReduce overplotting by grouping nearby points into hexagons whose color represents local density.Open Parallel coordinatesLook for correlations and outliers across multiple variables by connecting rows across vertical axes.Open Scatter plotLook for relationships between two numeric metrics by plotting them on an X and Y axis.Open

Reviewed 16 August 2026.