SankeyDiagram.net

WebApp to easily create Sankey Diagrams from plaintext input-data. No-Signup required, Open Source, Free, 100% local & private.

Important notes:

• The basic syntax for a flow is SOURCE [AMOUNT] TARGET, with one flow per line.
• There cannot be multiple flows with the exact same source and target.
• The color of a flow can optionally be specified with the syntax SOURCE [AMOUNT] TARGET [#COLOR_HEX_CODE].
• Using the [?] operator as amount, all outgoing flows are summed-up for a value
• A concrete example flow would look like this: salary [20] budget
• Flows going back to previous nodes are allowed
• Amounts cannot be negative
• Lines starting with // are treated as comments

Docs

• How To Create a Sankey Diagram: An example-based guide on creating Sankey Diagrams using SankeyDiagram.net

Examples

Basic Budget Sankey Diagram Example

salary [20] budget
// the "?" operator automatically sums-up all outgoing values
budget [?] groceries
groceries [3] vegetables
groceries [?] fruits
fruits [10] apples
fruits [5] bananas

USA Federal Budget Sankey Visualisation Example

Individual Income Taxes [2200] Federal Budget 2023 [#65a30d]
Payroll Taxes [1600] Federal Budget 2023 [#65a30d]
Corporate Income Taxes [420] Federal Budget 2023 [#65a30d]
Other [229] Federal Budget 2023 [#65a30d]

Federal Budget 2023 [?] Mandatory Spending [#ef4444]
Mandatory Spending [1300] Social Security
Mandatory Spending [839] Medicare
Mandatory Spending [616] Medicaid
Mandatory Spending [448] Income Security Programs
Mandatory Spending [502] Other Mandatory

Federal Budget 2023 [?] Discretionary Spending [#ef4444]
Discretionary Spending [917] Nondefense
Discretionary Spending [805] Defense

Federal Budget 2023 [659] Net Interest [#ef4444]