Open the figure
Open the image or the PDF page, and crop to the chart you need.
WAVESPEED AI DATA EXTRACTOR Runs in your browser
100% FREE
Extract Data from a GraphWhen all you have is the figure.
Recover the data behind a figure in a paper, a datasheet or a report.
Lines, markers and bars are found by colour; anything else you click.
Automatic by colourRotated scans handledFree and private
No sign-up No upload Nothing to install
Open a chart
An image, a screenshot from the clipboard, or a page of a PDF.
PNG, JPG, WebP, GIF, BMP or PDF · or paste a screenshot · or a saved project (.json)Or try an example
Your chart and data stay on your device.Images and PDF in · CSV, Excel and JSON out
THREE SIMPLE STEPS
How to use the Extract Data from Graph
Calibrate
Click two points on each axis whose values you know, and type the values.
Extract
Pick the colour of the line or markers, paint the area to search if needed, and press Find points. Check the result and export.
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Extract Data from Graph FAQ
How accurate is the extracted data?
Points are measured to a fraction of a pixel; on test charts with known data the average error was well under one pixel. Zoom in when you place the axis points, since that is where most error comes from.
Can it separate several curves?
Yes, when they have different colours: put each in its own dataset and extract each colour in turn. Lines of the same colour that cross have to be separated by painting the area to search.
Does it work with scanned figures?
Yes. Rotated or skewed scans are handled by the axis calibration, and warped ones by fitting three or more known points.
Is my data private?
Yes. Everything happens in your browser; the figure and the data are never uploaded.
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Extract Data from a Graph
Automatic by colour · Rotated scans handled · Free and private