Works great!

This worked great! I had a site that’s been around for years and had a lot of duplicate images, but they were all named different things so it was like a complicated game of “Memory” to try and find them myself. This plugin is just like the Google “search by image” to find duplicates, which is exactly what I needed. The free version will only tell you when it’s used as a featured image though, so if you want to be sure not to break anything, it might be worth getting the pro version. (although I used the built in search function to find images in posts/pages with some success)