Windows 10.
Please don't close as duplicate of
Copy paste an image from pdf file while maintaining transparency
Browsers are different than PDF viewers. I followed the links and none of the other discussions give an easy solution
If you have a regular version of Adobe Acrobat, say, and no specialized software, is it or is it not possible to extract an image with transparent background kept?
Just copy paste into a word processor or Paint.net makes the background black, not transparent.
Ideally no batch processing or command-line interfaces. Best answer is "install this free program and then regular copy paste works".