Sankey Diagram Maker

Create professional Sankey diagrams to visualize flow relationships and proportional quantities with our free online tool.

Add Nodes
Node Name Color Actions
Add Links
Source Target Value Color Actions

Supported formats: JSON, CSV

// JSON Example: { "nodes": [ {"name": "Solar", "color": "#FFD700"}, {"name": "Wind", "color": "#87CEEB"}, {"name": "Grid", "color": "#A9A9A9"}, {"name": "Home", "color": "#2c7da0"}, {"name": "Industry", "color": "#8B4513"} ], "links": [ {"source": "Solar", "target": "Home", "value": 150, "color": "#FFD700"}, {"source": "Wind", "target": "Home", "value": 100, "color": "#87CEEB"}, {"source": "Grid", "target": "Home", "value": 50, "color": "#A9A9A9"}, {"source": "Grid", "target": "Industry", "value": 200, "color": "#A9A9A9"} ] }
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About Sankey Diagrams

Sankey diagrams are powerful flow diagrams that visualize the proportional flow of quantities (like energy, materials, or money) between different nodes. The width of the links is proportional to the flow quantity, making it easy to see the most significant flows in a system.

Best Practices: Use Sankey diagrams for flow visualization where you want to show quantities. Limit the number of nodes to prevent clutter. Use contrasting colors for different flow paths.

When to Use Sankey Diagrams

  • Energy Flows: Visualize energy production and consumption
  • Material Flows: Show material usage in manufacturing
  • Financial Flows: Track money movement between accounts
  • Website Analytics: Display user journey paths
  • Supply Chain: Map supply chain logistics

Sankey Diagram Design Tips

  • Clear Labels: Label all nodes clearly
  • Color Coding: Use color to differentiate flow paths
  • Consistent Scaling: Ensure widths accurately represent quantities
  • Limit Nodes: Keep the number of nodes manageable
  • Flow Direction: Make flow direction obvious
  • Value Labels: Add labels to significant flows

Common Sankey Diagram Applications

Application Description Example
Energy Balance Show energy sources and consumption National energy flow diagrams
Material Flow Visualize material usage in processes Manufacturing input-output analysis
Financial Flows Track money movement between entities Budget allocation diagrams
Website Analytics Display user navigation paths User journey through a website
Supply Chain Map logistics and distribution Product distribution networks

Sankey Diagram Examples

Energy Flow Diagram

Budget Allocation

Where Sankey Diagrams are Used

  • Energy Management
  • Industrial Engineering
  • Financial Analysis
  • Environmental Science
  • Data Visualization