This software runs on Windows Linux and Mac OS X

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FreeFileSync 5 out of 5 based on 174< ratings.
Total Downloads 1,805,587
Last update October 9, 2014


FreeFileSync is a free, open source folder comparison and synchronization software for Windows, Linux and Mac OS X. It also works on 64bit operating systems on all platforms. The program can be installed in two versions: as a standard installer on Windows or as a portable application (no registry entries). Powered by a clean, easy, intuitive interface, this tool offers a myriad of features for synchronization purposes.


•Detect moved and renamed files and folders
•Copy locked files (Volume Shadow Copy Service)
•Detect conflicts and propagate deletions
•Binary file comparison
•Full support for Symbolic Links
•Automate sync as a batch job
•Process multiple folder pairs
•Comprehensive and detailed error reporting
•Copy NTFS extended attributes (compressed, encrypted, sparse)
•Copy NTFS security permissions
•Support long path names > 260 characters
•Fail-safe file copy
•Cross-platform: Windows/Linux
•Expand environment variables like %USERPROFILE%
•Access variable drive letters by volume name (USB sticks)
•Native 64-bit support
•Keep versions of deleted/updated files
•Optimal sync sequence prevents disc space bottlenecks
•Full Unicode support
•Highly optimized performance
•Include/exclude files via filter
•Local and portable installation
•Handle daylight saving time changes on FAT/FAT32
•Use macros %time%, %date%, et al. for recurring backups
•Case sensitive synchronization
•Built-in locking serializes multiple jobs running against the same network share

Those are just a couple of its features (not all), there are many others that are improved and added constantly.

FreeFileSync Review

Important: Please pay attention when you're prompted to install toolbars or any other third-party program that doesn't belong to FreeFileSync - you can choose to "Agree" or "Decline". If you choose to "Decline", NO other third-party software will be installed on your computer.

Note: Linux users can download a PPA (Personal Package Archive) Ubuntu version from LaunchPad

As soon as you install FreeFileSync, you will notice a clear, uncluttered interface. If you never used this program before, you should look at the help section. From the program interface, press the "Help" tab or F1 and the help file will open. The author of this program (Zenju), was kind enough to provide an excellent help file.

At the "Overview" section he made a basic usage map, including the necessary steps in order to use this tool. I won't cover a basic usage tutorial - as I said, the "Help" file does a great job but here's what the program do - in my own vision. Choose two folders (located on different partitions or devices) and it will compare and synchronize them. Obviously, the application allow you to choose between several synchronization settings. Each synchronization variant is briefly described in the settings window. If you need to include or exclude filters go to "Filter files" section. When you're ready to synchronize files, hit the "Synchronize" button. You can start to compare and synchronize files in a matter of minutes, there's no doubt. "Easy to use" is a concept that can be found at many applications but for FreeFileSync this is just another plus.

The real power of this program lies in its features. Just a few examples that worth to be mentioned: it can create batch files for automated synchronization, it can copy locked files (using Windows Volume Shadow Copy service) and it can surpass most similar programs such as SyncToy when it comes to speed (performance). Finally, this software is almost perfect and the most appropriate ending phrase would be "one of the best backup tool I've ever used!".

Last user reviews!

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RB October 16, 2014
I agree with reviewer JW below. I checked the MD5 hash and made sure I downloaded from one of the mirrors not the adware site two download links that show up. Comment edited: RB, all I said was to get in touch with the developer and ask him further explanations. Also, did you found another exe on a different website with a different signature? No! You didn't because it is the same exe that the developer created and I repeat, get in touch with him.
JW October 9, 2014
FossHub tries to download adware to your computer. This started sometime after v6.09. I cannot download 6.10 due to the adware being blocked. Not nice. Comment edited: No, you are wrong - check the signatures and get in touch with the developer.
Andy October 8, 2014
Definitily the best sync program available. i've tried multiple others, even commercial ones ... no comparison to this one!
DIRT October 7, 2014
best sync program I have found by far, and i've tried a heap. does things how i want
Sverre October 6, 2014
Very good!