FreeFileSync Open Source File Synchronization

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Synchronize Files and Folders

Key features
FreeFileSync is a folder comparison and synchronization software that creates and manages backup copies of all your important files. Instead of copying every file every time, FreeFileSync determines the differences between a source and a target folder and transfers only the minimum amount of data needed. FreeFileSync is Open Source software, available for Windows, Linux and macOS.

 

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FreeFileSync 10.2
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Latest News

Jul 16, 2018
Parallel file copy and ad-free installer
Jul 6, 2018
FreeFileSync 10.2 has been released!
Jun 11, 2017
FreeFileSync Video Tutorials available
May 24, 2017
FreeFileSync adds Support for FTP and FTPS
 
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User Reviews

"I want to say thank you. I use this software every day and there is no competitor. Thank you for the work you do."

James Santos

"Great app! I've been using it for many years — it really helps and saves a lot of time. Thank you!"

Александр Лебедев

"Excellent! Fast, easy-to-use, multi-platform and free: the best file sync tool, that I have ever used."

Adrian Toth

"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."

lawrencedol