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 10.7
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Latest News

Dec 12, 2018
FreeFileSync 10.7 has been released!
Jul 16, 2018
Parallel file copy and ad-free installer
Jun 11, 2017
FreeFileSync Video Tutorials available
May 24, 2017
FreeFileSync adds Support for FTP and FTPS
 
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User Reviews

I knew I should have just looked for an open-source solution to file synchronization rather than wasting my time with commercial trial software!
Brian Tao
The best sync util I've found. I am using it since version 3. It is the easiest way to keep a complete synced mirror from my laptop to my desktop user's folder. Highly recommended!!! A++++
Danurica
Great application for all your file/folder comparison and synchronisation needs. Allows you to add multiple, specific source and target folders and use filters to exclude and include specific files and/or sub-paths.

The generation of a batch script allows you to automate the synchronisation, which you set up in the GUI. It can then run regularly and in the background.

The synchronisation dialogue is beautiful, showing you the speed at which it happens. Display filters allow you to grasp the changes, and preview stats allow you to see the quantity of changes before-hand (so you don't make a mistake, moving the wrong way around for example).
kissaki
FreeFileSync is pretty awesome. It keeps my two laptops and external backup drives in sync. User friendly with self-explanatory buttons. Extremely fast synchronization. Keep up the amazing work in updating this software.
Dr.Janaka Vithanage