Sankey Diagram - Free Online Tool | PivaBox

Create interactive Sankey (flow) diagrams to visualize energy, material, or data flows between nodes

How to Use Sankey Diagram Generator

1. Click Example Data to load a pre-built energy flow diagram, or add custom flows with Add Flow
2. Edit source, target, and value for each flow in the table. The diagram updates automatically in real time
3. Customize node colors and download your diagram as PNG or SVG for use in presentations and reports

Frequently Asked Questions

Is Sankey Diagram Generator free?

Yes, PivaBox Sankey Diagram Generator is completely free to use. There are no charges, subscriptions, or hidden fees. All processing runs locally in your browser.

Are my flow data uploaded to a server?

No. All diagram rendering happens entirely in your browser using HTML5 Canvas. Your data never leaves your device, ensuring complete privacy and security.

What types of data can I visualize?

Sankey diagrams are ideal for visualizing energy flows, material flows, budget allocations, website traffic, supply chains, and any data that involves transfers or transformations between stages. Simply define source-target-value triples and the diagram will render automatically.