FreeFileSync
Free, open-source folder comparison and sync tool for backups and mirroring on Windows, macOS and Linux.
- Verified facts
- 5 of 5
- Alternatives ranked
- 4
- Approved reviews
- 0
- Visits sent from here
- 0
About FreeFileSync
FreeFileSync compares two folders and copies only what changed, which makes it a common choice for backing up to an external drive or NAS and for keeping two machines' folders in step. You can run one-way mirror or update jobs, or a two-way sync that tracks deletions and conflicts, and preview every change before it runs. It can copy files that are in use on Windows through the Volume Shadow Copy Service, compare by content, and sync to network shares, FTP and SFTP and some cloud storage. Saved jobs run as batch files from a scheduler, and the companion RealTimeSync tool watches folders and triggers a sync when files change. The program is open source and free, funded by ads on the website and donations; a Donation Edition adds extras such as email notifications and a portable install. It runs on Windows, macOS and Linux. It is a manual, file-level tool, not versioned or encrypted backup.
Best for: People who want simple, previewable folder mirroring or two-way sync to a drive or NAS.
Pros and cons
What works
- Free and open source on Windows, macOS and Linux
- Clear side-by-side preview before anything is copied
- Copies locked files on Windows via Volume Shadow Copy
- RealTimeSync can trigger jobs when folders change
Why people leave
- No built-in versioned snapshots, deduplication or encryption
- Some extras like email alerts need the Donation Edition
- Interface is functional but cluttered for beginners
Top FreeFileSync alternatives
See all 4- 1
Syncthing56.8Continuous, automatic peer-to-peer sync between devices instead of jobs you run by hand.
- 2
Duplicati54.4Adds encrypted, deduplicated and versioned backups to local or cloud storage, which FreeFileSync lacks.
- 3
restic52.6Snapshot-based, encrypted backups from the command line for people who need history, not just a mirror.
- 4
Arq Backup51.2Paid but polished versioned backup to your own cloud storage on Windows and Mac.
Why people left FreeFileSync
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FreeFileSync: common questions
Is FreeFileSync free?
Yes. FreeFileSync is free, open-source software.
Is FreeFileSync open source?
Yes.
What platforms does FreeFileSync run on?
FreeFileSync is available for Windows, macOS and Linux.
What are the best alternatives to FreeFileSync?
The highest-ranked FreeFileSync alternatives right now are Syncthing, Duplicati and restic. See the full ranked list for pricing, platforms and verified facts.