AllDup is a free tool for finding and removing duplicate files on your PC, network share, or external storage media. The quick search algorithm finds duplicates of any file type. The powerful search engine allows you to find duplicates by combining the following criteria: File name, file extension, file size, file content, file dates, and file attributes. Additionally, you can search for similar filenames, similar or almost identical images, and similar or almost identical music files. You can also find video and audio files and search for duplicate digital photos. For your safety, all files that need to be deleted can be moved to the Recycle Bin or to a separate backup folder. The built-in file viewer lets you preview many different file formats and analyze the contents of the file before deciding what to do with it.