Sankey Diagram Builder
Build interactive Sankey diagrams by entering source → target → value flows. Customize node colors, choose from templates, and download a high-resolution PNG.
Frequently Asked Questions
What is a Sankey diagram?
A Sankey diagram is a flow visualization where the width of each arrow or band is proportional to the quantity it represents. They show how resources, energy, money, or users move through a system.
How do I enter data?
Add rows with a source name, target name, and numeric value. For example: "Solar" → "Electricity" → 120 means 120 units flow from Solar to Electricity. Add as many rows as needed.
Can I customize the colors?
Yes. Click "Customize Colors" to reveal color pickers for every node. Each node is auto-assigned a color from a 12-color palette, but you can override any node with a custom color.
How do I download the diagram?
Click "Download High-Res PNG" to save a 2400×1400 pixel image with a white background, suitable for presentations, reports, or printing.
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