Sankey Diagram Maker
Show flow and transformation through the system. Create professional, interactive Sankey Diagrams in seconds without any design or coding skills.
Create Your Sankey Diagram NowInstant Creation
Generate charts in seconds
Fully Customizable
Colors, labels, and styling
Export Ready
PNG, SVG, and PDF
Free to Start
No credit card required
What is a Sankey Diagram?
Sankey diagrams visualize flows through a system, showing how quantities move from source to destination through intermediate steps. The width of each band is proportional to the flow quantity, making it easy to identify major pathways and bottlenecks. Sankey diagrams are invaluable for understanding resource allocation, customer journey flows, and energy transformations.
Sankey diagrams are particularly effective for visualizing customer conversion funnels, showing where users drop off and which paths lead to conversion. They're also used in energy analysis to show how energy sources are converted and consumed, and in supply chain visualization to show material flow. The proportional band widths make it immediately clear where the most significant flows occur.
When to Use a Sankey Diagram
How to Create a Sankey Diagram in 3 Steps
Upload Your Data
Copy and paste your data, upload a file (CSV, Excel, JSON), or type directly into our data table. CleanChart automatically detects your data structure and format.
Select Sankey Diagram & Customize
Choose Sankey Diagram from our chart type selector. Customize colors, labels, legend position, and styling. Preview changes in real-time as you adjust settings.
Export & Share
Download your Sankey Diagram as PNG, SVG, or PDF for reports and presentations. Embed the chart directly on your website or share a link with your team.
Real-World Example
Tracking customer journeys from first touchpoint through conversion
Best Practices for Sankey Diagrams
- 1.Keep labels clear and readable - use concise text that fits without overlapping
- 2.Use consistent colors throughout your visualization for easy pattern recognition
- 3.Include a descriptive title that explains what the chart shows
- 4.Ensure data is accurate and up-to-date before creating your chart
- 5.Consider your audience when choosing complexity and detail level
For more visualization guidelines, see resources from Tableau, Chartio, and the Interaction Design Foundation.
Create Sankey Diagrams From Your Data
Import your data from any format and convert it to a beautiful Sankey Diagram
Helpful Guides & Resources
Data Visualization for Beginners
Learn the fundamentals of creating effective charts
Chart Types Explained
When to use different types of charts for your data
Best Color Palettes for Charts
Choose colors that make your data stand out
Best Free Chart Makers (2026)
Compare top chart making tools and find the best fit
Frequently Asked Questions
How do I create a Sankey Diagram for free?
CleanChart offers a free tier that lets you create Sankey Diagrams. Simply upload your data, select Sankey Diagram as your chart type, customize the design, and export.
What data formats are supported?
We support CSV, Excel (.xlsx), Google Sheets, JSON, and direct paste from clipboard. You can also connect to databases and APIs for live data.
Can I customize the Sankey Diagram design?
Yes! You can customize colors, fonts, labels, axis formatting, legends, and more to match your brand or presentation needs.
What export formats are available?
Export your Sankey Diagram as PNG (for presentations), SVG (for editing), or PDF (for reports). You can also embed interactive charts on websites.
Is my data secure?
Yes. CleanChart processes data securely and follows best practices for data protection. We don't store your data longer than necessary for chart creation.
Ready to Create Your Sankey Diagram?
Start visualizing your data in minutes - no coding required.
Get Started Free