FreeFileSync - Open Source File Synchronization

Open Source File Synchronization
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Synchronize Files and Folders

Key features
Press release
FreeFileSync is a free data backup software that helps you synchronize files and synchronize folders. It is designed to save your time setting up and running data backups while having nice visual feedback along the way. FreeFileSync is Open Source software, available for Windows, Linux and macOS.


FreeFileSync 9.3

Latest News

Aug 9, 2017: FreeFileSync 9.3 has been released!
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User Reviews

Thumbs up Mahinder Nath reviewed FreeFileSync:

I have been using FreeFileSync for the last one year and have been a very happy user. It is easy to install and very easy to configure and use. I would recommend FreeFileSync usage.

Thumbs up doru001 reviewed FreeFileSync:

Saved my life. Now it takes me 30 sec instead of 45 min to update my 8000 files / 4 GB on LAN. I learned it in 30 sec. Simple and reliable.

Thumbs up rusnetrus reviewed FreeFileSync:

Super software! After 3 years of use I have only good impressions! Thanks and good luck!

Thumbs up lawrencedol reviewed FreeFileSync:

FFS is highly capable and very fast. More importantly, it's very reliable: I synchronize about 250K files daily, with typically a few thousand changed and about a 500 MB in size and it has yet to mess up.

I used to use MS's SyncToy, but that name actually characterizes it all: a "toy". SyncToy would frequently get confused and want to move things in the wrong direction or show conflicts which weren't the case (esp. with MS network share drives).

One of FFS's strengths is how well it handles conflicts, though I have occasionally wished it had a one-click-for-the-newest button, it's really easy to select a group of files and right-click to send them left or right.

Also, FFS is orders of magnitude faster than Microsoft's SyncToy for high-latency drives, like WAN drives; synchronizations that would take several hours with SyncToy 2.1 completed in less than 20 minutes using FFS (and that was quite some versions of FSS ago).

The UI is adequate, with some very minor shortcomings, like not being able to reorder the list of directories being synchronized. Overall it's pretty easy to use, though I think filters and the two settings dialogs could be merged into a single concept / dialog. The ability to hook in an external compare tool is excellent, and it works very well with WinMerge to check exactly what is different between particular files.
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