Image Comparator is a robust Windows desktop application designed to identify and manage duplicate or visually similar images using advanced Discrete Cosine Transform (DCT) algorithms. Unlike standard comparison tools, it effectively detects images that have been resized, compressed, or slightly modified.
...In order to do that it looks your images pixel by pixel; therefore even if two images have different formats and file sizes(MB/KB) Image Comparator finds them. Supported formats: jpg, bmp, png, gif, tif, ico. Requirements: .NET Framework 4.0. Works only on Windows.