Use the online graphreader tool to extract values from graph images. For 2D plots use the 2D Reader
1) Select a png, jpg or gif image and press 'Go'.
2) Resize blue rectangle to set ruler for axis scaling. Set values for x- and y-axis scaling accordingly.
3) Double-click to insert curve fix-points. Right-click to delete points (on tablet long touch).
4) Click 'Generate curve' to sample curve. Use controls below to redraw output.
5) Scroll down for more options and to see generated CSV data.

[2022.3.24] Please note! The site may experience some downtime in the coming period due to migration to a new web host. Sorry for the inconvenience.

Feedback is appreciated. Currently collecting ideas for the next version upgrade. So far the list includes: Option for guide gridlines, Magnification tool, 2D reader axis coordinates. Thanks!
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Axis Settings (defined by blue rectangle)


Curve Sampling (using fix-points)

Post-processing


Data Output

Inserted Fix-Points

Sampled curve

Post-processed curve


Output data field

--------------Sent---------------------
--------------Received---------------------