Say you want to pull down a large Linux ISO over BitTorrent and have the client stay quiet while it works. Transmission 4.1.3 is a free BitTorrent client for Windows built around that idea, with defaults that just work and a Qt-based interface updated for Windows 11.
The Transmission Project and its GPLv3 licence
Transmission is developed by the Transmission Project, which runs transmissionbt.com. The software is a cross-platform BitTorrent client, with versions for macOS, Windows and Linux.
It is released under the GPLv3 licence and is free.
Watch directories, blocklists and a web interface
The developers say the defaults are set to work without changes. A few clicks are enough to turn on advanced options such as watch directories, bad peer blocklists and the web interface.
The project also points out that Ubuntu chose Transmission as its default BitTorrent client, and that its easy learning curve was one of the most-cited reasons. That is the project's own account, not a test by our team.
Qt-based Windows UI and file details
The Windows interface is built on Qt. The developer says it has been modernized and is ready for Windows 11.
Version 4.1.3 is 22.2 MB and was released on June 30, 2026.
What's new in 4.1.3
Version 4.1.3 is a bugfix release. It fixes a CORS bug that leaked the anti-CSRF nonce, which matters for users who enable remote access, and a use-after-free bug in peer code. Users are encouraged to upgrade.
Transmission pros and cons
Pros
- Free to use under the GPLv3 licence
- Small download of 22.2 MB
- Advanced options include watch directories, bad peer blocklists and a web interface
- Windows UI is Qt-based and described as Windows 11 ready
- Version 4.1.3 fixes a security issue tied to remote access
Cons
- The interface cannot be previewed before installing
- Minimum system requirements are not listed
- Remote access users must update to be covered by the CSRF fix
Is Transmission safe?
Transmission comes from the Transmission Project and is released under the GPLv3 licence. Version 4.1.3 is a bugfix release that closes a potential CSRF issue for people who turn on remote access, and it also fixes a use-after-free bug in the peer code. If you use the web interface from other machines, the project encourages upgrading to this version.
How to install Transmission
- Press the download button to get the official file.
- Run the installer you saved and confirm the Windows security prompt if the publisher matches.
- Follow the setup steps, then start Transmission from the Start menu.
