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* refactor: make tr_session.is_incomplete_file_naming_enabled_ private

* refactor: make session callback setters constexpr

* refactor: make tr_session.is_port_random_ private

* refactor: make tr_session.desired_ratio_ private

* refactor: make tr_session.is_pex_enabled_ private

* refactor: make tr_session.is_idle_limited_ private


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Transmission is a fast, easy, and free BitTorrent client. It comes in several flavors:

  • A native macOS GUI application
  • GTK+ and Qt GUI applications for Linux, BSD, etc.
  • A headless daemon for servers and routers
  • A web UI for remote controlling any of the above

Visit for more information.


Transmission's documentation is currently out-of-date, but the team has recently begun a new project to update it and is looking for volunteers. If you're interested, please feel free to submit pull requests!

Command line interface notes

Transmission is fully supported in transmission-remote, the preferred cli client.

Three standalone tools to examine, create, and edit .torrent files exist: transmission-show, transmission-create, and transmission-edit, respectively.

Prior to development of transmission-remote, the standalone client transmission-cli was created. Limited to a single torrent at a time, transmission-cli is deprecated and exists primarily to support older hardware dependent upon it. In almost all instances, transmission-remote should be used instead.

Different distributions may choose to package any or all of these tools in one or more separate packages.


Transmission has an Xcode project file (Transmission.xcodeproj) for building in Xcode.

For a more detailed description, and dependencies, visit How to Build Transmission in docs

Building a Transmission release from the command line

$ tar xf transmission-3.00.tar.xz
$ cd transmission-3.00
$ mkdir build
$ cd build
$ # Use -DCMAKE_BUILD_TYPE=RelWithDebInfo to build optimized binary.
$ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
$ make
$ sudo make install

Building Transmission from the nightly builds

Download a tarball from and follow the steps from the previous section.

If you're new to building programs from source code, this is typically easier than building from Git.

Building Transmission from Git (first time)

$ git clone Transmission
$ cd Transmission
$ git submodule update --init --recursive
$ mkdir build
$ cd build
$ # Use -DCMAKE_BUILD_TYPE=RelWithDebInfo to build optimized binary.
$ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
$ make
$ sudo make install

Building Transmission from Git (updating)

$ cd Transmission/build
$ make clean
$ git submodule foreach --recursive git clean -xfd
$ git pull --rebase --prune
$ git submodule update --recursive
$ # Use -DCMAKE_BUILD_TYPE=RelWithDebInfo to build optimized binary.
$ cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
$ make
$ sudo make install


Code Style

You would want to setup your editor to make use of the .clang-format file located in the root of this repository and the eslint/prettier rules in web/package.json.

If for some reason you are unwilling or unable to do so, there is a shell script which you can use: ./


[MacStadium] macOS CI builds are running on a M1 Mac Mini provided by MacStadium
[SignPath] Free code signing on Windows provided by, certificate by SignPath Foundation