Open your File Explorer(Windows) or Finder(Mac). 2. Open a folder. 3. Use Finder’s or File Explorer’s search function to list all the image files in the folder. 4. Sort the image files by Name, Date, Size, Kind, and type of extension you want to find. 5. View and compare images. Identify similar pictures by comparing the visual content. 6. Move the unwanted similar images to the Trash or Recycle Bin.