A great plot digitizer should get out of your way. You should upload a figure, calibrate axes, extract points, fix a few outliers, and download data — without reading a manual.
What to look for
- Fast extraction for normal images (under a few seconds)
- Linear and log scales
- Editable points with undo
- Multi-series detection with reviewable overlays
- CSV and Excel export with aligned X, Y1, Y2 columns that include your edits
- Clean UI that works on laptop and phone
Where Plot2CSV fits
Plot2CSV focuses on one job: turn plot images into data. Line charts and scatter plots are supported today, including multiple colored or monochrome series in one figure. OCR axis reading and PDF upload remain future work.
If you value simplicity over feature bloat, start with Plot2CSV and export in the format your analysis tools expect.