Top 5 Free Sync Software for Windows 11 and Mac Both in 2026
Syncing means making sure the same files and folders are updated and available across more than one device. For example, if you edit a photo on your Mac, syncing makes sure that the same photo is updated on your Windows 11 computer too. It’s basically like having a smart assistant that watches your files and makes sure everything matches across your devices.
In technical terms, syncing compares the content of folders and then copies, updates, or deletes files as needed so both locations stay consistent. Sync can be one-way (from A to B) or two-way (changes in either place are reflected everywhere).
How Does a Sync Software Work?
At a high level, sync software works like this:
- Scan the folders: The software checks the selected folders on each device to see what files are present and what’s changed.
- Compare changes: It looks at file size, date, or content to figure out what changed since the last sync.
- Decide what to transfer: Based on rules you set (e.g., two-way sync), it decides what to copy, update, or delete.
- Transfer files: Files are moved or copied automatically between devices, local drives, or even network locations.
- Repeat regularly: Some tools let you schedule automatic syncs so your files are always current without you having to think about it.
This process is similar whether you’re syncing local folders or syncing across the internet. Good sync tools make this process smooth, fast, and reliable, even for beginners.
Top 5 Free Sync Software for Windows 11 and Mac Both in 2026
Here are the best free tools in 2026 that work on both Windows 11 and macOS, with pros and cons for each:
1. FreeFileSync
FreeFileSync is one of the most popular free folder sync tools available for Windows, macOS, and Linux. It compares your folders and syncs them based on your settings, helping you keep everything updated across devices. It’s open-source and widely trusted by users around the world.
Key Features
- Two-way sync or mirror sync
- Compare by date, size, or content
- Works with local drives, external drives, and network folders
- Automation via batch jobs
Why It’s Great
It’s powerful yet accessible, making it ideal for both beginners and advanced users. The interface is intuitive, and you can set up recurring sync tasks.
Limitations
- Some advanced automation features take a bit of time to learn
- Business usage may require a donation license
2. Syncthing
Syncthing is a free and open-source tool designed for continuous, real-time syncing between multiple devices. Unlike traditional cloud services, Syncthing syncs files directly between your computers over the internet, so you stay in control of your data.
Key Features
- Peer-to-peer file syncing
- Encrypted transfers
- Real-time sync
- Works without cloud servers
Why It’s Great
You get secure, private syncing with no dependence on third-party servers. Perfect if privacy is a priority.
Limitations
- Setup can feel a bit technical at first
- No built-in cloud backup option
3. Unison
Unison is a classic file synchronization tool that works on Windows, macOS, and Unix-like systems. It’s very reliable and supports syncing files between two machines in both directions.
Key Features
- Two-way sync with conflict detection
- Works over networks or local folders
- Lightweight and efficient
Why It’s Great
Unison is robust and dependable, especially for syncing folders that change on both devices.
Limitations
- Interface is not as user-friendly as others
- Best suited for users comfortable with simple but technical tools
4. Synkron
Synkron is an open-source tool that lets you sync folders across platforms, including Windows and Mac. It provides a simple interface and useful tools like multisync (syncing many folders at once).
Key Features
- Supports multiple folder sets
- Sync scheduling options
- Portable and lightweight
Why It’s Great
Synkron’s simple layout makes it a good choice if you want straightforward syncing without too many extra options.
Limitations
- Project development activity has slowed
- Lacks some advanced features found in more modern tools
5. ByteSync
ByteSync is a newer open-source sync solution designed for cross-platform file synchronization and secure transfers. It focuses on transferring only the changed parts of your files to save time and bandwidth.
Key Features
- Cross-platform support for Windows and macOS
- End-to-end encryption
- Efficient delta transfers (only changes are synced)
Why It’s Great
ByteSync brings modern syncing approaches with security in mind, making it a great option for remote or network syncs.
Limitations
- Still growing community and ecosystem
- Not as polished as some long-standing tools
Is It Safe?
Yes, sync software is generally safe as long as you download it from the official site or trusted repositories. Here are a few safety tips:
- Only download from the official website or well-known software portals.
- Enable encryption when available (like with Syncthing or ByteSync).
- Always back up your files before you sync for the first time.
- Be cautious with tools that ask for admin privileges without a clear reason.
By following these practices, you can enjoy syncing without putting your data at risk.
FAQs
Q: Can I sync files automatically in the background?
Yes. Tools like Syncthing and FreeFileSync can be set up to run automatically and keep your files synced regularly.
Q: Do I need the internet to sync files?
It depends. If you’re syncing over the internet, yes. But if both devices are on the same network, tools like Syncthing can sync without the internet.
Q: Can I use these tools for cloud storage syncing?
Some tools support cloud paths (like FreeFileSync with SFTP), but for full cloud integration, you might pair syncing with services like OneDrive or Dropbox.
Q: Are these tools free forever?
Yes, all the tools here have free versions that work without requiring payment, though some may offer paid enhancements.
Q: Which one is the easiest for beginners?
FreeFileSync is often recommended as the easiest place to start with syncing.
Conclusion
In 2026, there are many excellent free sync tools for both Windows 11 and Mac. Whether you want real-time automatic syncing, simple folder matching, or secure delta transfers, there’s something for every need and skill level.
Pick the tool that matches how you work. Start with something user-friendly like FreeFileSync or Syncthing, and explore more advanced options as you get comfortable.
Happy syncing!