Sankey Diagram Maker with AI Editing
Make a sankey diagram without wrestling a vector app or hand-editing raw text. MakeCharts turns plain rows of flows into a polished diagram, and an AI assistant applies your edits as fast as you can describe them, all in the browser.
Start free in seconds
Open the editor, drop in your data and export your first chart in minutes. Start on the free plan and upgrade when you want watermark-free exports.
Open the editorHow it works, step by step
Add your flows
Type source, target and amount rows in the editor, or import a CSV from Excel or Google Sheets. The diagram draws itself as the data comes in.
Shape it by chatting
Tell the AI what to change in plain English: rename nodes, recolor branches, merge small flows or move labels. Every edit lands on the canvas instantly.
Export and save
Download a watermark-free (paid plans) SVG for slides and print or a PNG for docs and social, and save the diagram to your cloud workspace to reuse it later.
Frequently asked questions
What is a sankey diagram?
It is a flow diagram where nodes are connected by ribbons whose width is proportional to the amount flowing between them, so the biggest movements stand out at a glance.
How do I make a sankey diagram online?
Open MakeCharts, add your flows as source, target and amount rows or import a CSV, then adjust colors and labels by chatting with the AI and export SVG or PNG.
Do I need to install anything?
No. Everything runs in your browser with nothing to install. A desktop screen gives you the most room, but the editor works on any modern device.
Is the sankey diagram maker free?
Yes. On the free plan, the full editor, the AI chat and all exports are free, and exports never carry a watermark on paid plans.
Your data is ready. Your chart is three steps away.
Open the editor