What is a Sankey diagram and when should I use one?

A Sankey diagram is a flow visualization where the width of arrows is proportional to the volume of flow they represent. Use them for: website traffic source analysis, marketing conversion funnels, energy system modeling, budget allocation tracking, and supply chain flow visualization.

How do I describe my flow data to the AI?

Describe your nodes and the volume flowing between them (e.g., 'Google Ads → Landing Page: 5000, Landing Page → Sign Up: 1200, Sign Up → Active User: 800, Active User → Paid: 200'). The AI generates a Sankey diagram with proportional flow widths.

Can it model multi-stage conversion funnels?

Yes. Sankey diagrams are ideal for conversion funnel analysis. Describe your funnel stages (Visitors → Leads → Trials → Paid → Retained) with volume numbers at each stage, and the AI renders a complete multi-stage funnel with loss branches showing drop-off at each step.

Is this useful for energy or material flow analysis?

Yes. Sankey diagrams originated in energy flow visualization. You can describe energy inputs, transformations, and outputs (e.g., fuel input, mechanical energy output, heat loss) and the AI generates a proportional energy flow Sankey.

Is the AI Sankey Diagram Generator free?

Yes. Free users can generate unlimited Sankey diagrams from text data descriptions. Pro subscribers get CSV data import, node color customization, and export to SVG and PNG formats.

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AI-Powered Diagram & Flowchart Maker

Diagram Type

Flowchart Sequence Diagram Class Diagram State Diagram ER Diagram User Journey Pie Chart Quadrant Chart Timeline Sankey Diagram XY Chart Block Diagram

Preview: Sankey Diagram

100%

Preview Sandbox

Organic Searchflow-input

Referral Linkflow-input

Web Ingress Gatewayflow-mid

Signupsflow-out

Bouncesflow-out

Pan to translate layout · Drag nodes to repositionSVG Engine v1.2

Organic Search

Format Shape: flow-input

ID: #in1

Template details mapping details parameter.

Percentage Weight: 80%

Your Diagram Canvas Library

Review, load, and manage your saved neural layout models.

Flow Volume & Distribution Diagram Builder

AI-Powered Sankey Diagram Generator for Flow Distribution & Conversion Funnels

Sankey diagrams are the most effective way to visualize how volume moves through a system — from traffic sources through user funnels, from budget allocations through spending categories, or from energy inputs through transformation outputs. Paperxify's AI Sankey Diagram Generator reads your flow data description and produces a proportional, multi-node Sankey flow map in seconds.

Proportional Flow Widths

Flow line widths are automatically scaled to represent the volume magnitude of each connection.

Multi-Stage Funnels

Models complex multi-step funnels with branching flows and loss nodes at each conversion stage.

Highly Rated

"Built a website traffic source → conversion funnel Sankey in 15 seconds. The proportional flows clearly showed where we were losing users. Invaluable for our analytics review."

Elena Rostova

Product Manager & Continuous Learner, Global

Capabilities Comparison

Why engineers, students, and researchers globally choose Paperxify for AI diagram generation.

Capabilities	Paperxify AI Diagrams	Draw.io / Lucidchart	Manual Diagramming
AI from Flow Description	Yes (Instant)	Manual data entry	Manual drawing
Proportional Flow Widths	Yes (Auto-scaled)	Yes (Manual)	Manual
Multi-Stage Branching	Yes (Complex funnels)	Limited free tier	Manual
SVG / PNG Export	Yes (Both formats)	Yes (Paid)	Screenshot only

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Frequently
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The Best Free AI Sankey Diagram Generator

Describe your flow data — sources, paths, and volumes. Get a complete proportional Sankey flow diagram in seconds.

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Free AI Sankey Diagram Generator — Flow Distribution & Conversion Funnels | Paperxify