CloneSpy v3.43

billon on 12 Oct 2019
  • 6MB (uncompressed)
  • Released on 12 Oct 2019
  • Suggested by Fluffy

CloneSpy can help you free up hard drive space by detecting and removing duplicate files with exactly the same contents regardless of their name, date, time, or location. Also, CloneSpy is able to find files that are not exactly identical, but have the same file name. This can be an issue for example if you have different versions of a file and you want to find and remove the older versions. CloneSpy is able to find zero-byte files.

Note: The installer now allows you to choose between a 32 or 64-bit version of CloneSpy.

System requirements: WinXP / Vista / Win7 / Win8 / Win10
Writes settings to: Application Folder
Stealth: ? Yes
Unicode support: Yes
License: Freeware
How to extract: Download the installer and select 'portable version' at installation type. Launch CloneSpy.exe.
Similar/alternative apps: DoubleKiller
What's new? Added:
  • You can now exclude sub-folders when marking or unmarking files in a folder via the context menu of the list box in the All duplicates window.
  • Remembered window sizes and positions can now be reset to their default values (see Misc page of the Options window).
  • Hard links and shortcuts are now created before the file to be replaced is deleted (see Deletion page of the Options window).
  • Leftover files are now deleted at the end of a scan to prevent deletion conflicts (see Deletion page of the Options window).
  • Deleted leftover files are now counted in the scan progress window and listed in the log file if deleted files have to be logged (see Logging page of the Options window).
  • The title of the Main window now contains the program version.
  • Renamed the Priority page of the Options window to Misc.
  • Renamed Execute file to Open file in the context menu of the Single duplicates window and All duplicates window.

24 comments on CloneSpy  The Portable Freeware Collection Latest Entries Feed

MarkyMark 2015-04-10 02:08

Oh awesome. Well, it's still great software - it does one thing & does it very well.


I am Baas 2015-04-09 16:44

@MarkyMark Dup Detector is in the database at


MarkyMark 2015-04-09 15:36

A lot of people here trying to delete multiples of the same image - I just wanted to give a shout out to Dup Detector, which is a great piece of software that does exactly that.

Dup Detector doesn't just do file-size/checksum analysis, it actually analyzes the images to find similarities. E.g. one could be black & white and the other can be color, or one can be watermarked, or one could be taken 2 seconds later because someone blinked & it'll find both and display them to you and ask which one you want to delete or if you want to keep both. You can choose how strict it is in its matching algorithm - 100% mach, 95% match etc.

You can even have it set up to automatically select which one to delete based on rules - e.g. the smaller one. Then you just approve the selection by hitting the space bar, or you can just let it do its thing automatically, or you can go full-manual mode and click the image you want to delete. Super fast way to delete duplicates and easy to use. I've used it professionally to manage large image catalogs that had a lot of duplicates of different sizes.

Unfortunately, it's not portable.

The latest version I have is 3.3.02 from July 8, 2011. You can get an earlier version from rareware.


Midas 2014-07-04 17:41

@ronaldreed48: clever plug for have you tested it? Is it portable?


ronaldreed48 2014-07-03 09:17

Here I have got some useful ways to free up your disk space by deleting duplicate files and free up disk space.
Go to here,


__philippe 2013-08-11 15:16

Top-notch Alternative:
Leaner (139k !), faster File Content search AND Duplicate File checker rolled into one tool:

Nirsoft SearchMyFiles



Robert 2010-11-02 11:01

I've been using CloneSpy for many years, some of my suggestions have made it into the program and I was beta-tester in the process of making the program work with Windows DEP.

It may not be the fastest program, but it works flawlessly and the developer reacts nearly instantly when you inform him of bugs (and most of them should by now be gone) or suggestions, the "Delete empty subdirectories" in batch that was added to 2.52 comes from me (and maybe others)

As for some of the comments above:

No it will not assume a.txt another a.txt, as it builds checksums for each file (and probably also compares sizes)

No, there is no need to confirm 10,000 times that you want to delete a file, unless you tell it to do so

And most of all, it's a neat little program at just over 1Mb, without any dependency on DLL's or the registry.

Bill 2010-08-31 15:36

I've used this utility for about 5 years along with several other dup killers. It has a bit more of a learning curve than some of the others and users might miss, or not understand, certain options (like how to show all of the duplicate files together instead of having to confirm each file individually. Maybe the designer could make showing all of the files together the default. It lets you save a set of options that you can load for different situations. I haven't used it much but it's worth looking if you want customized de-duping. The app isn't the fastest but I'm not looking for fast as much as I'm looking for accuracy. So far, this app hasn't let me down. It's a useful addition to my toolkit.

MCBastos 2010-04-11 17:01

Myself, I prefer using Dupemerge ( It leverages the use of NTFS hardlinks to free space while keeping both directory entries -- even with different names. If you install the Hardlink Shell Extension, you can see which files are hardlinked easily.

noaven 2010-03-14 17:58

very slow software and pops 10000 windows that needs 10000 confirmations !

Easy Duplicate Finder / Duplicate Cleaner (no portable) / Dupkiller are way better

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