This website is the first result that comes up in the google search
https://automeris.io/WebPlotDigitizer/
Please suggest better open source softwares which can do similar work.
On this page of the site you can watch the video online Extract data from a bar chart using WebPlotDigitizer with a duration of hours minute second in good quality, which was uploaded by the user Shubham Singh 01 August 2021, share the link with friends and acquaintances, this video has already been watched 1,721 times on youtube and it was liked by 11 viewers. Enjoy your viewing!