DupKiller is a software that helps users locate and delete duplicate or similar files on their computer. It offers the ability to compare files based on their attributes and contents, regardless of their file types.

Thanks to complicated algorithms built into its searching mechanism, DupKiller delivers rapid file search results. Plus, it offers plenty of options for customizing your search to suit your needs, including the ability to compare files by content and specify a minimum percentage match.
One of the best things about DupKiller is that it searches for unneeded duplicates in places you might not even think to look. It's not just a matter of comparing files by name, last modification date, or size; DupKiller can also compare different-length files and include/exclude files by mask.
Overall, DupKiller's data processing algorithms make it faster and more efficient than other programs of its kind. So, if you're ready to clean up your computer and free up space, DupKiller is definitely worth checking out.
Version 0.8.2: Made enabling/disabling subfolders in the lists of inclusions and exclusions; Allowed disabling of file existence check and file icon display in dupe list; Improved plugin support; Improved autoselection; Made replacement of duplicates with shortcuts; Fixed some bugs.
Version 0.7.2: Made preview file size limitation; Enabled viewer integration into the GUI; Made character table detection for plain text files; Added RTF, HTML, GIF support in viewer; Included plugin Simple Image Comparer; Fixed bugs.
Version 0.7.1: Made file copying/moving from the dupe list to a folder; Made skipping of files with exact names during comparison of files with similar names; Made plugin support; Made shortcut resolving; Made adding of files and folders with Drag and Drop; Fixed bugs.
Version 0.7.0: Fixed incorrect work with files of large sizes (over 2 GB); Made comparison by similar filenames; Made comparison by filenames ignoring their extensions; Made comparison by filetypes; By default, DupKiller list extension is .dkl; Made different changes.
Version 0.6.5: Made missing files check before autodeletion; Fixed long pause on the Autodelete window show; Allowed wildcards in autodeletion; Fixed bug when files without extensions were not found during scan; Allowed selection of all folders with files to be removed.
Version 0.6.4: Fixed wrong button positioning when large fonts were used; added rescan of files from current list; added removable and network drives update lock; added plain text file preview; added the "Up" button into the "Folder Exclusion" window; fixed minor bugs.
Version 0.6.3: Added additional language file support; Added display of progress during list preparation or removal of missing files from list; Sped up working with list; Included support of large amount of graphic formats; Fixed minor bugs and made small improvements.
Version 0.6.2: Fixed bug caused search engine to hang sometimes; made user settings saving; made some interface improvements; made show of real path to drives; added file type associations; added some features and shortcuts; fixed some bugs.