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.


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've been using this for a couple years now to back up to my USB drive and it works flawlessly. Keep up the good work! :)"

Luke Matthews

"Thanks for a great app. It really gives peace of mind knowing that files are backed up right. Especially when I discovered image programs aren't transferable to another computer. FreeFileSync files are. Yeah!"

Dale Dudas

"It's a very good program! Very useful! Thank you for creating this program. From South Korea"

Kim Han

"Best out of all 5 sync programs I've tried, both commercial (Goodsync, AllwaySync) and non-commercial (SyncBack, SyncToy). Don't waste your time trying other "commercial" ones. THIS IS THE BEST."