Free Sankey Diagram Generator
Build a sankey diagram online without wrestling with a drawing tool. Paste your flows or import a CSV, then refine every node and ribbon by chatting with AI. MakeCharts exports crisp SVG and PNG with no watermark on paid plans, starting free.
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
Open the editor and type your flows as simple source, target and amount rows, or import a CSV exported from Excel or Google Sheets.
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 share
Download your sankey as SVG for slides and print, or PNG for docs and social. Save it to the cloud and come back to it anytime.
Frequently asked questions
Is this sankey diagram generator really 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.
Can I import data from Excel or Google Sheets?
Yes. Export your sheet as CSV and drop it into the editor. Each row becomes a flow with a source, a target and an amount.
How is this different from classic sankey generators?
Classic free tools make you edit raw text and rebuild the layout on every change. Here you edit by chatting with AI, import CSV directly and save your work to the cloud.
Which formats can I export?
SVG and PNG. SVG stays sharp at any size, which makes it ideal for presentations, reports and print.
Your data is ready. Your chart is three steps away.
Open the editor