Index chart generator
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Index chart
Compare relative growth across series by setting all to 100% at a specific start date. Create a private, publication-ready index 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
An index chart re-scales multiple time series to start at a common base value (typically 100 or 0) at a chosen reference date. This visual mechanism aligns all lines at a single origin point, allowing for direct comparison of relative percentage growth or decline across series that have vastly different absolute scales. All data parsing and rendering happens locally on your device, guaranteeing your financial or proprietary data is never uploaded to external servers.
Input Format & Required Columns
Format input columns for index chart with explicit headers and numerical measurements. Verify that rows represent discrete categories or observations without unformatted symbol artifacts.
Example Comparison Table
| Date | S&P 500 | Bitcoin | Gold |
Best Practices for Category Comparison
- Ensure sufficient visual distinction for index chart marks across standard and high-contrast viewports.
- Align text labels horizontally whenever possible to improve cognitive readability for index chart elements.
- Double-check scale boundaries and zero-anchors before exporting index chart presentation artwork.
- Data shape
- Date plus two or more 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 index data instead of showing raw numbers?
If you compare Bitcoin ($60,000) and Gold ($2,000) on raw axes, Gold looks like a flat line. Indexing them reveals their relative percentage growth.
Reviewed 16 August 2026.