How do you obtain a list of all image file names on a wordpress website for replacement?

Good Day, I hope somebody can assist me please. I have to replace/re-upload all the images on a website, as they were uploaded as massive files. I have to downsize all the images, and want to know if there is a way to get a list of file names so that I can downsize the images and replace them, without editing every image one at a time. The source images on the website are 1920x1080, and I need to re-upload as 800 x800 for a lot of them, with a much lower KB/file size. I'm new at this, so would really appreciate some help.Is it possible to extract a list of all the file names?