WebPlotDigitizer – Extract data from plots, images, and maps

I posted it not because it is in the web, but because it is powerful. For example: automatic extraction of barplots of selected color.

Before I explored tons of applications requiring to manually click of the every single point. And actually I am hoping for an app automatically getting scales and coordinate system.

Some advantages of web apps is that they are multi-platform out of the box, don't require any setup or admin privileges and don't require installing dependencies (e.g. the link you point to, while looking like a really great product, depends on gtk).

I am the creator of this app. I made this as a fun side project during grad school, but kept working on it as my friends or I needed more features. Over time it has become fairly popular and now I am thinking of making a traditional desktop software as well.

The main reason I built this was that existing tools (including G3Data) were either tedious, did not have any sub-pixel level accuracy or were limited to simple XY plots only. I took a very simple web based approach as it was easier for me and I could get this to work on virtually any computer in the lab that had a browser and internet.