Plot digitizer, online and automatic
A plot digitizer turns a chart image back into numbers. With most digitizers, you calibrate the axes and then you click every point. graph2table does this work for you. graph2table automatically extracts the data table from a chart image. It is the current state of the art on scientific benchmarks such as ChartX.
You check the result. The tool shows each extracted point on your original plot. You can correct a point before you export the data.
Digitize a plot in three steps
Paste or upload the plot
Copy a chart from a PDF, a paper, or a screenshot. Paste it on the converter page, or upload the image file. The extraction starts automatically.
The digitizer reads the plot
The tool finds the axes, reads the scales, and extracts each data series. You do not calibrate the axes and you do not click data points.
Verify and export
The tool shows each extracted point on your plot. Drag a point to correct it. Add or remove points if necessary. Then export the table as CSV or Excel.
Verification is part of the workflow
Automatic extraction is useful only if you can check it. The digitizer draws every extracted point on the plot image. Four anchors show how the tool maps pixel positions to data values. You can drag each anchor. If the overlay is not aligned, move an anchor onto its tick mark. All points then move with it. The exports include your corrections.
This is important when the numbers go into a meta-analysis, a systematic review, or an engineering model. You can always compare the data with the source figure. You can also check the accuracy claim. The benchmark report publishes every extraction behind that result.
Batch conversion
One old paper can hold twelve figures. Paid accounts upload many images in one batch. The tool converts each file separately and shows its status. You download the results as one ZIP file of CSV files. You can add custom instructions to limit the extraction to one series, one axis, a range, or a subplot.
Frequently asked questions
Is the plot digitizer free?
You can try it without an account and see the result. A free account includes 2 full conversions with CSV and Excel export. After that, you buy credit packs. The credits do not expire.
What plot types does it digitize?
It reads standard chart images: line charts, scatter plots, bar charts, and other common plot types. The source can be a PDF export, a photo, or a screenshot.
How accurate is it?
graph2table is the current state of the art on scientific benchmarks such as ChartX, and the benchmark extractions are released. You can also verify each chart yourself. The tool shows every extracted point on the original image. If the overlay is not aligned, you can move the axis anchors.
Can it digitize many plots at once?
Yes. Paid accounts can upload many images in one batch. The tool converts each file separately. You download the results as one ZIP file of CSV files.
How is this different from a manual plot digitizer?
With a manual digitizer such as WebPlotDigitizer, you calibrate the axes and click each point. Here the extraction is automatic. Your work is to check the result. See the comparison page for the differences.
Try the plot digitizer
Paste a chart and see the extracted table in seconds. You do not need an account for the first look.