Question 1

What CSV format does this accept?

Accepted Answer

Standard comma-separated values with a header row. The first column becomes the X-axis labels; every subsequent column is treated as a numeric data series. Commas inside quoted numbers (e.g., "1,000") are handled automatically.

Question 2

Are there any limits on data size?

Accepted Answer

Practical limits depend on your browser. Up to ~10,000 rows render smoothly on modern hardware. For larger datasets, pre-aggregate in a spreadsheet first.

Question 3

Is my data uploaded anywhere?

Accepted Answer

No — 100% client-side. Your data never leaves your browser. Nothing is transmitted to our servers.

Question 4

What export formats are supported?

Accepted Answer

PNG (transparent background), JPEG (white background, smaller file), and HTML embed code with an inline base64 image.

Line Graph Maker

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