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 10.5
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Latest News

Oct 11, 2018
FreeFileSync 10.5 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

Love the FreeFileSync software! It has made backing up everything super easy and convenient for me!
Scott Todd
I have tried two other free synchronisation software suites: Synkron (also SourceForge software) and RichCopy (from Microsoft). FreeFileSync is better than both of them for a number of reasons:

1. Intuitive user interface: I setup a multiple folder synchronisation within minutes! The buttons are clear, and if you aren't exactly sure of their function, hovering the mouse over the buttons will reveal clarifying information.

2. Informative: I knew exactly what files were being deleted or updated. The initial "compare" function is MUCH clearer and easier to use than Synkron's "analysis" function. Synkron would give no information about the analysis while it was occurring, so you don't know what progress it is making. FreeFileSync lets you know how the comparison is going, and gives a very handy graph to show progress, including file transfer rates, etc...

3. Stable: I have not yet had FreeFileSync crash on me. RichCopy and Synkron have both crashed, and Synkron tends to freeze the system.

4. Efficient: Synkron writes the synchronisation files to a backup file for some reason which I could not disable in the settings. This both slows the system down, but also uses up a significant amount of hard drive memory over time, since these files are not deleted. Quite simply the best free synchronisation software I have ever used!
mechtengineer
Awesome program; thanks so much for developing this! I use it to back up all of my important data files that I store on a separate disk on a nightly basis, and have recovered from a hard drive failure with zero loss once already. Excellent program!
Steve Storm
Simple, usable without a large manual, fast, totally free trial, no BS. Please keep showing the big moguls how it should be done.
Hendrik Kok