Sunburst chart generator
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Sunburst chart
Show nested composition as concentric arcs arranged around a hierarchy root. Create a private, publication-ready sunburst chart 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.
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.
Appearance
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.
Hierarchical Structure & Parent-Child Nesting
A sunburst chart displays complex hierarchical data using concentric rings, where the inner circle represents the root node and outer rings represent child sub-levels radiating outward. The angular sweep of each arc is proportional to its quantitative value, allowing you to quickly perceive how large parent categories break down into smaller nested components. All rendering and data processing happens entirely locally on your device, guaranteeing that your structural data is never uploaded to any external servers.
Tree Data Representation & Branching
Format input columns for sunburst chart with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.
Sample Node Hierarchy
| Parent | Child | Headcount |
Navigation & Nested Density Best Practices
- Ensure sufficient visual distinction for sunburst chart marks across standard and high-contrast viewports.
- Align text labels horizontally whenever possible to improve cognitive readability for sunburst chart elements.
- Double-check scale boundaries and zero-anchors before exporting sunburst chart presentation artwork.
- Data shape
- Item, parent, and numeric value 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
How do you read a sunburst chart?
Start from the center and move outward; each outer arc is a direct child subdivision of the inner segment it touches.
Reviewed 16 August 2026.