AllDup is a flexible tool that will quickly locate duplicate files on your system, and allow you to delete any that you don't need.

The program is supremely configurable. You can tell it which drives and folders you'd like it to examine, for instance (and it works happily with local and network systems). File and folder filters (inclusive or exclusive) make it easy to search for particular folders and file types only. And you can choose to compare files by any combination of name, extension, size, content, last modified date and more.

All these options don't seem to slow AllDup down, though, and the program generally delivered speedy results for us. Even when this isn't possible - you're scanning a huge external USB drive, say - it doesn't feel slow as the program delivers good feedback, with a progress meter revealing how much longer you'll have to wait, and how many duplicates have been found so far.

And once the process is complete, then you get a host of options to select particular files and delete any that you don't need. So many, in fact, that you need to be careful: delete something important and you could trash your PC. Pay attention and take the time to learn how the program works, though, and it'll help you analyse your hard drives and potentially free up a great deal of space.

What's new in 4.1.0? (see changelog for more)

- NEW: Comparison Criteria 'File Name' / Option 'Find similar file names': Now you can select the algorithms 'SmartMatch', 'FuzzyMatch', 'Levenshtein', 'Ratcliff', 'MatchDiff', 'WordMatch', 'FuzzyPercent' and 'Simil' to find similar file names. See examples at the help file.
- NEW: Search Options: Added the option 'Abort the search operation after a certain amount of duplicates was found'.
- UPD: Comparison Criteria 'File Name': The option 'Partial name matching' was renamed to 'Find similar file names'.
- FIX: Various optimizations have been introduced in various sections of AllDup. Various bugs have been fixed.

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AllDup is a versatile and highly configurable duplicate file finder. As usual with this kind of program, though, you need to be extremely careful in interpreting its results: sometimes duplicate files are essential, and removing something important could seriously damage your PC.