I created a similar in-browser version a while back with mozilla's pdf-js. The diff rendering is all run client side. https://www.parepdf.com https://www.parep

I created a similar in-browser version a while back with mozilla's pdf-js. The diff rendering is all run client side. https://www.parepdf.com https://www.parepdf.com The diff-pdf project was my inspiration but I wanted to create a version that was distributable to non-programmers.