Streamgraph generator
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Streamgraph
Show changing composition as flowing layers across an ordered time axis. Create a private, publication-ready streamgraph directly in your browser without transmitting sensitive rows off-device. Data is processed locally on your hardware with zero server uploads, enabling instant export to SVG, PNG, and Excel data.
Edit the data, then export.
Everything runs in your browser. Your data is not uploaded.
Data
Paste tab-separated data from Excel or edit the cells directly.
Paste or import table data
Paste a header row, or choose a local CSV/TSV file. Files are read in this browser and capped at 500 rows.
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Preview
Sample preview of the example data. The live chart takes over as soon as you start working.
SVG, PNG, and Excel exports are generated locally in this browser. PowerPoint export is temporarily unavailable while its dependency path is reviewed for a high-severity image parser advisory.
Temporal Dynamics & Trend Analysis
A streamgraph is a variation of a stacked area chart where the baseline is shifted symmetrically around a central horizontal axis, creating an organic, fluid shape that emphasizes macro trends. It illustrates how the proportions and volumes of multiple categories evolve over a continuous time axis. All rendering and data processing in Trendalyzer happens entirely on your local machine, guaranteeing complete privacy with no data uploaded to external servers.
Time-Series Layout & Column Schema
Format input columns for streamgraph with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.
Sample Time Series Matrix
| Year | Pop | Rock | Hip-Hop | Electronic |
Design Rules for Longitudinal Data
- Ensure sufficient visual distinction for streamgraph marks across standard and high-contrast viewports.
- Align text labels horizontally whenever possible to improve cognitive readability for streamgraph elements.
- Double-check scale boundaries and zero-anchors before exporting streamgraph presentation artwork.
- Data shape
- Period plus two or more component columns
- Exports
- SVG, PNG, and Excel data; PowerPoint export is temporarily unavailable pending dependency review.
How it works
You edit a table in this page. The renderer draws an SVG from those rows in your browser, then you can download SVG, PNG, or Excel data. The table is not uploaded to any external processing server.
Frequently asked questions
Is a streamgraph suitable for precise data analysis?
Streamgraphs prioritize visual engagement and macro flow over micro-precision, making them ideal for media, journalism, and storytelling.
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Reviewed 16 August 2026.