https://automeris.io/WebPlotDigitizer/

Many Thanks Gregory, it's a perfect solution.

Hello,

alternatively, you can download another digitizing software via this link:

http://getdata-graph-digitizer.com/download.php

I found it very helpfull and simple to use.

It gives you a 30 days free trial version offer.

Greeting,

There are many- The following pieces of software are also good for this application:

1) Origin

2) ScanIt: https://www.amsterchem.com/scanit.html

3) DataThief: https://www.datathief.org/

4) Plotdigitizer: http://plotdigitizer.sourceforge.net/

5) Graphdigitizer: http://www.silkscientific.com/graph-digitizer.htm

I hope this helps.

Webplotdigitizer is the best and free. It works online as a well as offline

https://youtu.be/PW1nYO8ayMc