SankeyMATIC

SankeyMATIC turns a list of source-to-target amounts into a proportional flow diagram in the browser. It is built for the moment when a spreadsheet has the facts but none of the choreography.

What is SankeyMATIC?

Some data wants to be read down a column. Other data is clearly trying to go somewhere. SankeyMATIC is for the second kind. Its documented input is pleasingly plain: name a source, give it an amount, name a target, and let the tool arrange the branching paths with widths tied to the numbers. The result can make a budget, process, material flow, or sequence of decisions much easier to follow than a stack of cells. The project was created by Steve Bogart in 2014 and its official documentation says ordinary processing and image or SVG generation happen locally in the browser. That is a genuinely useful distinction for sensitive drafts, with one clear exception: a deliberately created public link is visible to people who have it. This review did not enter sample data or export a diagram, so the profile records the documented workflow rather than claiming a hands-on output.

What you can do there

• Enter flow data
• Preview a Sankey diagram
• Export image or SVG

Why we picked it

It takes a familiar but awkward question — where did all of this go? — and gives it an answer shaped like a path instead of a lecture. The modest input format leaves the attention for the story hidden inside the quantities.

How to get the most from it

Arrange each flow as a source, a number, and a target, then start with a small set of steps before styling anything. Check that totals add up and labels mean what you think they mean; the diagram can clarify a process, but it cannot rescue muddled input.

Good to know

SankeyMATIC's official documentation says local browser processing is the default, but creating a Public Link exposes that diagram's data to anyone with the link. This draft did not create, export, or share a diagram, so current controls and accessibility still need administrator review.

Who made it, and when?

Steve Bogart is the credited creator or organization.