CloneSpy v3.41 Updated

billon on 27 May 2018
  • 6MB (uncompressed)
  • Released on 26 May 2018
  • 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:
  • Files and folders that are ignored during scanning can now be logged (see Logging page of the Options window).
  • A new option remembers size and position of the Add folder window (see Priority page of the Options window).
  • The new command line option -s allows for silent scans (see the help file for details).
  • A message box now explains the Delete all (!) option on the Time + Size page of the Options window when that option is selected.
  • Removed the entry Programme from the default folder ignore list (see Folders page of the Options window).
  • Hitting the space bar while a scan is ongoing no longer closes the scan progress window.
  • The context help now works for the edit box in the Insert mask window.
  • Corrected typo (spacing) in the Mode drop-down box of the Main window.

24 comments on CloneSpy  The Portable Freeware Collection Latest Entries Feed

raphael 2006-12-08 03:41

One app I wouldn't want to use. Duplicate finders (every filemanager has a file search function) enough and the latter function is bound to send you to disaster. Part of being a professional is knowing where you can burn your fingers :-)

adamh 2006-12-08 06:10

neat tool. Since my mom and sister both have digital cameras, they are constantly moving pictures to and from the hard drive and their SD yea, this should help sort out those duplicate pictures....hehehe.

raphael 2006-12-08 11:45

Just what I ment, wait till both of them save different pictures as 'special.jpg'. If your mother doesn't wipe your ass, your sis will scratch your eyes out :-)

FredD 2006-12-09 01:17

I've been using it for the last 2 years, it is an incredibly powerful, time and disk space saving app.
So many options, so many capabilities, packed in a simple GUI.
Just like any powerful tool, be sure to check twice before deleting.

Ronin 2006-12-09 06:24

This is PERFECT for finding duplicate files IF your careful.. I especially like using it for finding duplicate photos. Wish it had a thumbnail view though that would make positively perfect!

markus 2007-01-02 02:03

one of the best tools. If only there would be more of them.
Thanks to the programmer.
One of my best tools.

Local 2007-06-19 08:18

I love this tool. It is now one of my essential apps that goes everywhere with me.

It doesn't delete files based on their name (on the original settings) but on their content.

There is also a preview of what the files are when using manual delete.
But I've been using this for ages and it hasn't made a mistake yet.
If you're especially concerned you could always use the "export duplicate list" feature.
It still saves you a lot of time, and being a "professional" that is very important to me

Niefer 2008-01-06 22:59

Using it for years. Just a perfect tool, used it a lot against fonts nightmare.

Arnie 2008-06-24 20:41

Does Clonespy work in Vista?

fsr 2008-09-15 13:26

Good question, I extracted the contents and it worked, but the "add folder" function is causing my Vista 32-bit to freeze for 10 seconds and than it goes back to normal, working Ok. In home page they say it wasn't tested in a Vista platform, and they appreciate users input. I just give them my feedback. But my first impression was also very positive.

John Karma 2008-11-14 07:42

Tried the program on a 120gig usb disk filled to about a 100.
The program is SLOOOOOOOWWWWWW it took more than 30 minutes with no idea how long to go, and then my patience was gone and pressed the x and removed the program.
Another thing is I had to confirm every time something was found which stops the process, it would be nice if a list is produced (a textfile is but then I have to do things by hand after that). Automatic deletion is possible just not my thing and if you're not an idiot it probably isn't for you either.

Before trying clonespy I used Doublekiller which takes a couple of minutes, lets me know something about the progress and has more intuitive options.

looking at the screenshots of the other programs it seems to me they do the same as Doublekiller or less, never more.

Strange fact that ranked by popularity the crappy programs come first, I will stick to Doublekiller (unless something far superiour comes along)

so if:

1) if have a lot of files and or big files (who doesn't now a days)
2) your time is precious to you, or you hate waiting.

DO NOT use Clonespy, I recommend doublekiller.

regards John

wu-wei 2008-11-18 05:30

@John Karma

CloneSpy generates signatures for every file it checks - hence a little more time and effort is involved in running the scan. I believe you can disable the signature checking and speed things up, but you do so at your own peril.

Same for the prompt on each file deletion. CloneSpy has several options for deletion - manual, defer to a batch file, or automatic. And you can choose to auto delete or just move to a folder for review before deletion.

As a digital packrat, I rather like this app to help me weed through my multiple downloads of various apps.

Like any powerful tool, use your brain and a good amount of caution before you go deleting things.

tempeleng 2008-12-02 04:40

I really, really prefer the simpler interface of this program compared to the others listed on this site. It's also quite fast when searching the duplicates but the popup style of handling any duplicates it finds is kinda annoying.

Nh 2009-12-16 22:01

Finally CloneSpy supports unicode so it's the best duplicate checker - absolutely.

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

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.

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.

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.

__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



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,


Midas 2014-07-04 17:41

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


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.


I am Baas 2015-04-09 16:44

@MarkyMark Dup Detector is in the database at


MarkyMark 2015-04-10 02:08

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


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