Power BI Custom Visual

Sankey Diagram for Power BI

AI-generated sankey diagram for Power BI. Describe what you need in plain English; download a ready-to-import .pbiviz file. Full TypeScript source included.

A Sankey diagram visualizes flow between nodes — how a quantity distributes and transforms as it moves between categories. In Power BI, Sankeys are the go-to visual for energy audits, customer-journey analytics, budget cascades, and multi-stage funnel analysis where a standard funnel chart can't show the branching between paths.

Native Power BI doesn't ship a Sankey. The AppSource marketplace has a handful, but they're generic: fixed layouts, opinionated color palettes, limited interactivity, per-user subscription fees that stack as your organization grows. Building one from scratch in TypeScript with D3.js takes roughly 40 hours of developer time — and then you maintain it.

VizForge generates a Power BI Sankey custom visual from a plain-English prompt. Describe your data shape and styling preferences; our AI writes the TypeScript visual, validates it against 24 quality rules, and packages a .pbiviz file you import directly into Power BI Desktop. You own the source code, can modify it in VS Code, and pay once per visual instead of per seat.

When to use a sankey diagram in Power BI

Customer journey: acquisition channel → onboarding step → conversion or churn
Budget cascade: total revenue → segment → cost bucket → net margin
Energy / material flow audits (sources → intermediates → outputs)
Multi-stage qualification funnels where candidates flow between named states
Employee headcount movement (joins, exits, transfers between departments)

Example prompt

Example VizForge prompt

Sankey diagram showing customer flow from 5 acquisition channels through 3 onboarding steps to either Converted or Churned. Left-aligned node labels with percentages. Use a blue-to-green gradient for converted paths and red for churn.

Data shape required

Three columns: source (text), target (text), value (numeric). Each row is one flow segment. For multi-level Sankeys, chain source→target rows so the targets of one level appear as sources in the next.

Typical DAX measures

Total Flow = SUMX( FlowTable, FlowTable[Value] )

Flow to Churned =
    CALCULATE( [Total Flow], FlowTable[Target] = "Churned" )

Conversion Share =
    DIVIDE( [Flow to Churned], [Total Flow] )

Generate a Sankey Diagram — starts free

Free plan: 3 visuals per month. No credit card required.

FAQ

Does the Sankey work in Power BI Service or only Desktop?

Both. Generate the .pbiviz, import it into Power BI Desktop, build your report, publish to Service — the visual renders in the browser exactly as it does locally.

Can a Sankey cross-filter other visuals on the page?

Yes. Every VizForge-generated Sankey includes SelectionManager integration, so clicking a node or link acts as a slicer on the rest of the page.

How many levels can the Sankey handle?

Arbitrary depth. The AI-generated visual infers levels from your source/target columns — 2 levels, 5 levels, 12 levels — and lays them out automatically.