Sankey Chart Maker, Create Sankey Diagrams Free Online
Paste your flow data, pick a template, and export and use in PowerPoint or Google Slides. Built for energy flows, budget allocation, user journeys, revenue breakdowns, and any data showing how quantities move from sources to destinations. Free to start.
Everything You Need to Create Sankey Diagrams
- Source-Target-Value Format: Each row is a flow: source, target, value. Paste from Excel or Google Sheets. AECharts builds the node layout automatically.
- Multi-Level Flows: Flows can pass through intermediate nodes, such as supply chains, conversion funnels, or energy transformation. No limit on depth.
- Custom Node Colors: Full control over node colors and link opacity. Match your brand palette or use a built-in theme.
- Export Straight to PowerPoint: Export and drop it directly into PowerPoint, Google Slides, or reports.
- Real-time Preview: See every change instantly. What you see in the editor is exactly what exports.
- No Design Skills Needed: Templates handle node positioning and link routing automatically. Paste your data and export. Most users are done in under a minute.
When to Use a Sankey Diagram
Sankey diagrams excel at showing flows, transfers, and relationships between categories, any time you need to show how quantities move from sources to destinations.
- Energy Flow Analysis: Show electricity generation sources flowing to consumption sectors, or track carbon emissions through supply chains.
- Budget Allocation: Display how funds flow from revenue sources to spending categories, such as government budgets, company P&L, or departmental spend.
- User Journey Mapping: Track how users flow through your product or website, from landing pages through conversion funnels to purchases or sign-ups.
- Supply Chain Flows: Map material and product flows through manufacturing and distribution networks from raw materials to end customers.
- Revenue by Channel: Show how total revenue is generated across channels (organic, paid, direct, referral) and how each flows to product lines.
- Migration Patterns: Visualize population or customer movement between segments, regions, or competitors. Show talent flows or churn between brands.
Sankey Diagram vs Bar Chart
Both visualize quantities, but Sankey diagrams are specifically for flow between categories.
Sankey Diagram
- Best for: Flow data, showing how quantities move from sources to destinations through intermediate stages.
- Strength: Link width encodes quantity. Readers see both the direction and magnitude of each flow at once.
- Use when: Energy flows, budget allocation, user journeys, supply chains.
Bar Chart
- Best for: Comparing independent values across categories without implying flow.
- Strength: Simple, familiar, and precise. Bar height maps directly to value.
- Use when: Revenue by region, product comparisons, rankings.
AECharts supports both. Switch between Sankey and bar to find the right format for your data.
How to Create a Sankey Diagram
Choose a Template. Browse Sankey diagram templates and pick one that matches your use case.
Enter Your Flow Data. Paste source-target-value data from Excel or Google Sheets. The editor builds the Sankey structure automatically.
Customize Style. Adjust node colors, link opacity, and labels. Match your brand or use a built-in color scheme.
Export. Export and drop it directly into PowerPoint, Google Slides, or reports.