Open Source Continuous File Synchronization
Go HTML JavaScript CSS Protocol Buffer Shell Batchfile
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assets gui, assets: Compress PNGs using ZopfliPNG Jun 28, 2016
cmd cmd/syncthing: Fix -logfile/-no-restart test on non-Windows. Jan 18, 2017
etc etc: Updated ufw firewall application preset with default GUI port Dec 1, 2016
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lib lib/scanner: Avoid per iteration allocations in Blocks() Jan 18, 2017
man gui, man: Update docs & translations Jan 10, 2017
script build: Fix proto builder on Windows Nov 3, 2016
test lib/model: Fix tests, clean up pool usage in protocol Dec 21, 2016
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.gitattributes lib/protocol: Revert protobuf encoder changes in v0.14.17 (fixes #3855) Jan 1, 2017
.gitignore jenkins: Build snap Oct 20, 2016
.mailmap Include ref#, show author nickname in release notes Dec 7, 2014
AUTHORS authors: Update adelq Jan 7, 2017 Add Code of Conduct Dec 2, 2014 all: Update docs.s.n links to use https Oct 27, 2016 goals, readme: Add updated project goals Jan 19, 2017 issue_template: Add note about security issues May 21, 2016
LICENSE MPLv2 Mar 17, 2015
NICKS authors: Update adelq Jan 7, 2017 pull_request_template: Add note about docs needing update Mar 26, 2016 goals, readme: Add updated project goals Jan 19, 2017
build.go vendor: Update Jan 3, 2017 build, lib: Correct total test coverage calculation Aug 8, 2016
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Latest Build (Official) API Documentation MPLv2 License CII Best Practices


Syncthing is a continous file synchronization program. It synchronizes files between two or more computers. We strive to fulfill the goals below. The goals are listed in order of importance, the most important one being the first. This is the summary version of the goal list - for more commentary, see the full Goals document.

Syncthing should be:

  1. Safe From Data Loss

    Protecting the user's data is paramount. We take every reasonable precaution to avoid corrupting the user's files.

  2. Secure Against Attackers

    Again, protecting the user's data is paramount. Regardless of our other goals we must never allow the user's data to be susceptible to eavesdropping or modification by unauthorized parties.

  3. Easy to Use

    Syncthing should be approachable, understandable and inclusive.

  4. Automatic

    User interaction should be required only when absolutely necessary.

  5. Universally Available

    Syncthing should run on every common computer. We are mindful that the latest technology is not always available to any given individual.

  6. For Individuals

    Syncthing is primarily about empowering the individual user with safe, secure and easy to use file synchronization.

  7. Everything Else

    There are many things we care about that don't make it on to the list. It is fine to optimize for these values, as long as they are not in conflict with the stated goals above.

Getting Started

Take a look at the getting started guide.

There are a few examples for keeping Syncthing running in the background on your system in the etc directory. There are also several GUI implementations for Windows, Mac and Linux.

Vote on features/bugs

We'd like to encourage you to vote on issues that matter to you. This helps the team understand what are the biggest pain points for our users, and could potentially influence what is being worked on next.

Getting in Touch

The first and best point of contact is the Forum. There is also an IRC channel, #syncthing on freenode (with a web client), for talking directly to developers and users. If you've found something that is clearly a bug, feel free to report it in the GitHub issue tracker.


Building Syncthing from source is easy, and there's a guide that describes it for both Unix and Windows systems.

Signed Releases

As of v0.10.15 and onwards release binaries are GPG signed with the key D26E6ED000654A3E, available from and most key servers.

There is also a built in automatic upgrade mechanism (disabled in some distribution channels) which uses a compiled in ECDSA signature. Mac OS X binaries are also properly code signed.


Please see the Syncthing documentation site.

All code is licensed under the MPLv2 License.