A flow diagram where ribbon widths are proportional to the amounts moving between stages — money, users, energy. Wider ribbon, bigger flow.
Free AI sankey diagram generator
Describe your flows in plain English or paste a spreadsheet, and the sankey draws itself — nodes placed, ribbons sized to the numbers. No custom text syntax to learn, no bracket notation.
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What is a sankey diagram?
A flow diagram where ribbon width is proportional to quantity: money moving through a budget, users moving through a product, energy moving through a system. The wider the ribbon, the bigger the flow, which makes leaks, drop-offs, and dominant paths visible in a way tables never manage.
How to make a sankey diagram with AI in 3 steps
1Add flows, ask for the diagram
Three columns (source, target, value), one row per flow. Paste the data and describe what flows where. Then type something like "show traffic from channel to signup to paid plan" and the ribbons appear, stage by stage.
sourcetargetvalueOrganicSignup4,120Paid adsSignup2,860SignupPaid plan1,340
Traffic from channel to signup to plan
2Refine it
Reorder nodes, set colors by category, adjust labels, tidy crossing ribbons until the story reads left to right.
Select chart typeSankey
Color by categoryColor palette
3Export and share
PNG, SVG, or PDF for the deck, or a live interactive version where hovering a ribbon shows the number.
PNG
From prompt to a sankey diagram
This is what it looks like in the notebook — one prompt in, an explained, editable diagram out.
Acquisition funnel
Ask AI
Show traffic from channel to signup to paid planOrganic brings the most traffic — 4,120 signupsagainst paid's 2,860 — but converts to paid at a similar rate. The widest loss is at the signup stage: 7,520 visitors never convert, more than four times the number who do.
Channel to signup to plan
Sankey diagram use cases
Anywhere a quantity moves between stages and you want to see where it ends up.
Money flows
Revenue in on the left, costs and profit out on the right: the income statement as one picture. Same idea works for personal budgets.
User journeys
Where users actually go: entry points through features to conversion or churn. Drop-offs show up as thinning ribbons, not rows in a table.
Marketing channels
Traffic from source to campaign to outcome. One diagram answers "which channel actually converts," including the paths in between.
Energy and resource flows
The original use: inputs, useful output, and losses. Anywhere something is consumed, transformed, and partly wasted.
Sankey diagram types
Simple sankey
Two sets of nodes, one hop between them. Sources on the left, destinations on the right. The clearest version when you only need to show where things went.
Multi-level sankey
Flows passing through three or more stages: channel to campaign to signup to plan. Each stage adds a column of nodes, and the ribbons carry through.
Alluvial diagram
Same ribbons, but the stages are categories or points in time, showing how membership shifts between them. Ask for either name; you'll get the right thing.
Why teams pick Deepnote as their sankey chart maker
Understands the data
Hand it flows in whatever shape you have: source-target-value columns or a plain description. The nodes, ribbons, and widths sort themselves out.
Stays connected
Ribbons re-draw as the numbers move. Connect a CSV, Google Sheet, or live database and the flow stays current.
Built for sharing
Publish an interactive sankey people can hover ribbon by ribbon, embed it, or export a still for slides.
Explore other chart types
The same AI generator handles every common chart — pick the one that fits your data.
Sankey diagram FAQs
Show where it all goes
Paste the flows, prompt once, and drop the finished diagram into your deck, doc, or dashboard.