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A tiny, hackable BitTorrent client written in modern C++. Based on Rasterbar-libtorrent to provide high performance and low memory usage.

Quick facts

  • Full support for BitTorrent 2.0 (BEP-52), v1, v2 and v1+v2 hybrid torrents.
  • Supports DHT, PeX, LSD, UPnP.
  • (Azureus-style) peer ID: -PI-. Example: -PI0151- (major: 0, minor: 15, patch: 1).
  • User agent: PicoTorrent/x.y.z.
  • Native look-and-feel across Windows versions.
  • Easy to use with high performance.

The portable version of PicoTorrent requires manual installation of the Microsoft Visual C++ Redistributable for Visual Studio 2019.

Download for Windows

Download zip

Building PicoTorrent

To successfully build PicoTorrent, you need the following libraries and applications installed,

λ git submodule update --init --recursive
λ dotnet tool restore
λ dotnet cake --platorm=[x86|x64] --configuration=[Debug|Release]


PicoTorrent uses Weblate to handle the translation process. If you want to help, feel free to signup and give your contribution.


Copyright (c) Viktor Elofsson and contributors. PicoTorrent is provided as-is under the MIT license. For more information see LICENSE.