WebPlotDigitizer
Ankit Rohatgi / Automeris
Download from the vendor
automeris.io
A tool for pulling data out of an image of a plot. You load a photo or scan, calibrate the axes from two known points, and trace the curve by hand or with automatic detection. It handles Cartesian, logarithmic, polar and ternary plots as well as maps, and can measure distances. Engineers use it to turn curves from standards, catalogues and papers into a table of values they can calculate with. The new online version requires sign-up and limits the number of free images.
Ratings & Reviews
| Licence type | Completely Free, Open Source |
|---|---|
| Licence terms | Open-source licence (AGPL-3.0). Free for any purpose including commercial work, with no time limit, no registration and no licence key. The previous (archived) edition is a free offline desktop app for Windows, macOS and Linux; the new online version limits how many images can be processed for free. |
| Platforms | Linux, macOS, Windows, Runs in the Browser |
| Engineering field | Architecture, Civil Engineering, Electrical & Electronics, Mechanical Engineering |
| Tool type | Numerical & Mathematics, General Productivity |
| Vendor site | automeris.io |
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Last verified: 2026-10-05
