Sankey Diagram Generator

• Free online Sankey diagram maker — no download or installation required
• Add custom nodes and flow data with real-time chart updates; perfect for traffic analysis, data flow visualization, energy flow diagrams, and more
• Export your diagram as a high-resolution PNG image with one click — ideal for sharing and documentation

1. Open the tool page — no installation needed
2. In "Node Settings", enter a node name and click "Add Node"; alternatively, pick a preset from "Preset Examples" and click "Load Example" to load sample data instantly
3. In "Link Settings", choose the source and target nodes, enter the flow value, then click "Add Link" — the Sankey diagram updates in real time
4. Hover over the preview to inspect nodes and flows; click "Export PNG" to save the image, or "Reset" to clear all data

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — your data never leaves your device

Free online Sankey diagram generator. Custom nodes and flow data, real-time Sankey chart rendering. Perfect for traffic analysis, data flow visualization, energy flow diagrams, and more. One-click export as PNG.

Open the tool page — no installation needed In "Node Settings", enter a node name and click "Add Node"; alternatively, pick a preset from "Preset Examples" and click "Load Example" to load sample data instantly In "Link Settings", choose the source and target nodes, enter the flow value, then click "Add Link" — the Sankey diagram updates in real time Hover over the preview to inspect nodes and flows; click "Export PNG" to save the image, or "Reset" to clear all data

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device

Yes, Sankey Diagram Generator is completely free. No download or installation required — it runs right in your browser.