Difference chart generator
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Difference chart
Highlight where two ordered series diverge and which one is larger. Create a private, publication-ready difference chart 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.
Appearance
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.
Visual Encoding & Comparative Anatomy
A difference chart (or gap area chart) visualizes the exact distance between two related, continuous time series. By filling the intersecting regions with alternating colors based on which line is higher, it explicitly reveals periods of surplus, deficit, and variance over time. All rendering and data processing happens entirely locally on your device, ensuring your sensitive metrics are never uploaded to any external server.
Input Format & Required Columns
Format input columns for difference chart with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.
Example Comparison Table
| Year | Exports ($B) | Imports ($B) |
Best Practices for Category Comparison
- Ensure sufficient visual distinction for difference chart marks across standard and high-contrast viewports.
- Align text labels horizontally whenever possible to improve cognitive readability for difference chart elements.
- Double-check scale boundaries and zero-anchors before exporting difference chart presentation artwork.
- Data shape
- Period and two numeric series 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
Why is a difference chart visually powerful?
The colored fill between lines immediately draws attention to periods of surplus versus deficit without requiring mental subtraction.
Related tools
Reviewed 16 August 2026.