Sankey Diagram Generator

Turn three columns — where the flow starts, where it goes and how much — into a sankey diagram, then export it as a PNG.

Your data never leaves this browser

The file is parsed, previewed and charted on your own device. Nothing is uploaded — not even a sample. Close the tab and the data is gone.

Or paste table text

Load a table with three columns — source, target and value — then click Generate chart.

How it works

  1. 1.Load a CSV or Excel table with three columns: where the flow starts, where it goes, and how much.
  2. 2.Check the three column pickers. Switch the aggregation from sum to count when each row is already one unit (one user, one order).
  3. 3.Click Generate chart — the width of each ribbon is the combined value, and the nodes are laid out so you can read the flow left to right.
  4. 4.Download the PNG, or work through the rows listed as left out: self loops, missing names and negative values are dropped on purpose instead of being silently drawn as zero.

Frequently asked questions

Do I get free credits to try Sankey Diagram Generator?
Yes — new accounts get 3 free credits to spend on any tool, Sankey Diagram Generator included. After that you only pay for what you run.
How many credits does Sankey Diagram Generator cost?
Everything runs in your browser and nothing is uploaded: free accounts pay 1 credit per run, and Pro or Pro+ members run it as often as they like.
Is the content I paste private?
Sankey Diagram Generator uses your input only to generate the result. Stored results are deleted automatically by our retention policy, and you can remove any run from your history.
Do I need to install anything?
No. Sankey Diagram Generator works in any modern browser — nothing to download or install.