bittorrent-tracker Review, Pricing & Features

bittorrent-tracker is a free, open-source Node.js library for building BitTorrent tracker clients and servers, used by WebTorrent.

Category
File Management
Pricing
Free (open source), from Free
Verified
Not yet
Last updated
July 18, 2026
APIOpen SourceSelf-Hosted

Overview

bittorrent-tracker is an open-source Node.js library, maintained by Feross Aboukhadijeh and WebTorrent, LLC, that implements both the client and server sides of the BitTorrent tracker protocol under the MIT license. It underpins WebTorrent, a widely used streaming/browser-based torrent client, and is also used by tools like peerflix.

Rather than being a hosted service, it is a code library developers install via npm and embed into their own applications to add BitTorrent tracker client or server functionality.

Key Features

The library supports all three mainstream tracker transport protocols: HTTP trackers, UDP trackers (BEP 15), and WebSocket-based WebTorrent trackers needed for browser peer-to-peer connections, plus IPv4/IPv6 support and the tracker scrape extension for querying stats on multiple torrents in one request.

It exposes a Client class for announcing to trackers and retrieving peer lists, and a Server class for running your own tracker with HTTP, UDP, and WebSocket endpoints plus a built-in web statistics dashboard.

Pricing

bittorrent-tracker is free and open source under the MIT license, installable via `npm install bittorrent-tracker`. There is no paid tier; developers who run a tracker server built on this library are responsible only for their own hosting costs.

Key Features

Pros & Cons

Pros

  • Free, open-source (MIT license) and actively maintained by the WebTorrent team
  • Battle-tested in production via WebTorrent and other popular torrent tools
  • Supports all three major tracker transport protocols, including browser-compatible WebSocket trackers
  • Offline-runnable test suite makes contributions and validation straightforward

Cons

  • A code library, not a hosted product, so developers must integrate and deploy it themselves
  • No official commercial support; help comes from community/GitHub issues
  • Requires Node.js and JavaScript development expertise to use
  • Running a public tracker server carries the same legal/compliance considerations as any BitTorrent infrastructure

Frequently Asked Questions

Is bittorrent-tracker free?

Yes, it is free and open source under the MIT license, installable via `npm install bittorrent-tracker` with no licensing fees.

What is a BitTorrent tracker?

A tracker is a web service that BitTorrent clients query to discover other peers sharing the same torrent; it coordinates peer discovery but does not transfer file data itself.

What protocols does bittorrent-tracker support?

It supports HTTP trackers, UDP trackers (BEP 15), and WebSocket-based WebTorrent trackers, covering both traditional desktop torrent clients and browser-based peer-to-peer connections.

Who uses bittorrent-tracker?

It is used by WebTorrent and other Node.js-based torrent tools like peerflix, and is maintained by Feross Aboukhadijeh and WebTorrent, LLC.

Can I run my own tracker server with this library?

Yes, the package includes a Server class that lets developers stand up their own HTTP, UDP, and WebSocket tracker endpoints, complete with a built-in statistics dashboard.

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