I needed to convert a bunch of PDF files with pictures into image files.
I volunteered to create a slideshow for a family reunion and and one cousin sent me dozens of PDFs, which don't play nice with my editing software.
After playing around with several online converters, I settled on PDFtoPNG.
You don't need to install anything to use this tool.
Open a browser and navigate to https://pdftopng.online/
The start page shown in Fig 1 is pretty intuitive.
Click the large green [Choose File] button to open a "File Open" dialog, as shown in Fig. 2.
Select a file and click [Open]. You can only convert one file at a time, but each file takes only a few seconds.
A "Converting file" message (Fig 3) displays, while the system does its thing.
When the conversion process is complete, a [Download] button displays, as shown in Fig 4.
Click this button to save your newly-created PNG file to disc. If the PDF file contains multiple images, a ZIP file containing all the images is created.
Using this tool, I was able to quickly convert dozens of PDFs to PNG files and add them to my slideshow. It was simple, free, and I did not need to install or uninstall any software.