This software runs on Windows Linux and Mac OS X

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FreeFileSync 5 out of 5 based on 187< ratings.
Total Downloads 2,009,863
Last update November 5, 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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TJC November 22, 2014
Cleanest, EASIEST, fastest, and best backup app bar none.
Danurica November 18, 2014
The best sync util I've found. I am using it since version 3. Is the easyest way to keep a complete synced mirror from my laptop and my desktop user's folder. Highly recommended!!! A++++
Uday Krishna November 17, 2014
Surely the best sync application currently including paid one. Simply the best and work flaslesswly. Meets the requirement of people who has to work on multiple systems
John V. Brennan November 16, 2014
Works Flawlessly! Saves Time. Easy to Use. Can't wait to finally create a Backup for my Notebook. I just used it last night to Sync my Pictures folders on my Vista Notebook, with the My Pictures folder on my wife's desktop Acer Netbook w/XP. I have them networked. Last night I did the whole shebang for the first time. I'm happy now that we both have the same photos. My Notebook is the Main one regarding the photos. Having an exact copy of the Pictures on my Notebook is a Joy. I do most all the photography, and I have valuable photos on my system such that if I was to lose them, it would be a tragedy for me. I needed, wanted, something easy to use, and if possible Free. I live on a disability check and have to squeeze pennies. Not only for that reason, being that I most often find these "Free" programs to be Top Notch anyway. Sure Enough, FreeFileSync, totally satisfies my desires and requirements. FreeFileSync is MUCH Better Than Expected. ASAP I'm going to budget in a Donation. I'm going to do what I can to support FreeFileSync. For me, I'm no longer insecure about my extremely valuable photos, but I feel a bit of anxiety about FFS... I'm afraid if I don't support it, it might go away! That would be a complete tragedy as well. I also use it to Backup and/or duplicate other folders like my ITunes folders, MP3's, Video... Porn (Ha!)... you know, all the important "Data" that's Priceless and would be a shame to lose. Thanks to ALL Responsible for their Creative Thought and Work, Assembling this Fine, Much Needed, and Appreciated Application and Digital Work of Functional Art. And FreeFileSync is the Perfect Name although quite often I refer to it as FastFileSync... I guess either name will work just as well. Best Regards to You & Yours, At Your Service! John V. Brennan Owego, NY