Sankey Diagram Maker
A Sankey diagram shows flow between stages, with band thickness proportional to volume. Paste three columns: source, target and value.
Chart type
Your data7 rows · 3 cols
CSV detected
Live previewUpdates as you type · nothing leaves your browser
Export
Features
What the sankey diagram maker gives you
- Paste CSV, Excel cells, TSV, JSON or a Markdown table
- Live preview — every edit renders instantly, no Generate button
- Export 2x PNG, vector SVG, PDF or copy the image
- Transparent background and five business colour palettes
- No signup, no watermark, nothing uploaded to a server
Use cases
When to use a sankey diagram
- User journey from channel to conversion
- Energy or material flow through a system
- Budget flowing from source to spend category
FAQ
Sankey Diagram Maker questions
- What data does a Sankey diagram need?
- One row per flow: where it comes from, where it goes and how much. Nodes are inferred from the names you use, so you never define them separately.
- Why does my diagram fail to render?
- Almost always a cycle — a chain of flows that leads back to where it started. Sankey layouts require a direction, so break the loop or rename the repeated stage.
- Sankey or funnel chart?
- A funnel handles one linear path. A Sankey handles branching, so it can show several sources merging and a stage splitting into multiple outcomes.
Related
Try another chart type
Import formats
Paste from anything
- CSV to ChartPaste raw CSV text or drop a .csv file. Delimiters, quoted fields and header rows are detected automatically.
- Excel to ChartSelect cells in Excel, press Ctrl+C, then paste here. Copied spreadsheet cells arrive as tab-separated values, which FastChart reads natively.
- JSON to ChartPaste an array of objects, an array of numbers, or a flat key–value object. Keys become series and values become data points.
- Markdown Table to ChartGreat for tables produced by ChatGPT, GitHub READMEs or Notion. Pipes and the separator row are handled for you.
- TSV to ChartTab-separated values are what your clipboard holds after copying from a spreadsheet or a database client. Paste them straight in.
- Google Sheets to ChartGoogle Sheets charts are hard to style and hard to export cleanly. Copy the range instead and get an export-ready chart here.
About This Tool
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