DoubleKiller searches for duplicate files by comparing any combination of name, size, modification date and content. You can exclude files or limit the scan to files matching masks like *.mp*g, files in a particular file size range or files with certain attributes, like hidden or system files. When the scan is finished a list containing all duplicates found is displayed and you can manually or automatically select the files to be removed.

DoubleKiller Pro is a heavily extended version of the Standard version offering superior performance, greater flexibility and a lot of additional features. Advanced comparison options for each criterion allow to only compare a part of the filename or content or to specify an allowed difference in file size or date. Two distinct file pools make it possible to quickly compare a small number of new files against a huge collection.