WebTorrent

The streaming torrent client. For node.js and the web.

Features

Torrent client for node.js & the browser (same npm package!)
Insanely fast
Download multiple torrents simultaneously, efficiently
Pure Javascript (no native dependencies)
Exposes files as streams
- Fetches pieces from the network on-demand so seeking is supported (even before torrent is finished)
- Seamlessly switches between sequential and rarest-first piece selection strategy
Supports advanced torrent client features
- magnet uri support via ut_metadata
- peer discovery via dht, tracker, lsd, and ut_pex
- protocol extension api for adding new extensions
Comprehensive test suite (runs completely offline, so it's reliable and fast)

Browser/WebRTC environment features

WebRTC data channels for lightweight peer-to-peer communication with no plugins
No silos. WebTorrent is a P2P network for the entire web. WebTorrent clients running on one domain can connect to clients on any other domain.
Stream video torrents into a <video> tag (webm (vp8, vp9) or mp4 (h.264))
Supports Chrome, Firefox, Opera and Safari.

Install

To install WebTorrent for use in node or the browser with require('webtorrent'), run:

npm install webtorrent

To install a webtorrent command line program, run:

npm install webtorrent-cli -g

To install a WebTorrent desktop application for Mac, Windows, or Linux, see WebTorrent Desktop.

Ways to help

Join us in Gitter or on freenode at #webtorrent to help with development or to hang out with some mad science hackers :)
Create a new issue to report bugs
Fix an issue. WebTorrent is an OPEN Open Source Project!

Who is using WebTorrent today?

Lots of folks!

WebTorrent API Documentation

Read the full API Documentation.

Usage

WebTorrent is the first BitTorrent client that works in the browser, using open web standards (no plugins, just HTML5 and WebRTC)! It's easy to get started!

In the browser

Downloading a file is simple:

var WebTorrent = require('webtorrent')

var client = new WebTorrent()
var magnetURI = '...'

client.add(magnetURI, function (torrent) {
  // Got torrent metadata!
  console.log('Client is downloading:', torrent.infoHash)

  torrent.files.forEach(function (file) {
    // Display the file by appending it to the DOM. Supports video, audio, images, and
    // more. Specify a container element (CSS selector or reference to DOM node).
    file.appendTo('body')
  })
})

Seeding a file is simple, too:

var dragDrop = require('drag-drop')
var WebTorrent = require('webtorrent')

var client = new WebTorrent()

// When user drops files on the browser, create a new torrent and start seeding it!
dragDrop('body', function (files) {
  client.seed(files, function (torrent) {
    console.log('Client is seeding:', torrent.infoHash)
  })
})

There are more examples in docs/get-started.md.

Browserify

WebTorrent works great with browserify, an npm package that lets you use node-style require() to organize your browser code and load modules installed by npm (as seen in the previous examples).

Webpack

WebTorrent also works with webpack, another module bundler. However, webpack requires the following extra configuration:

{
  target: 'web',
  node: {
    fs: 'empty'
  }
}

Or, you can just use the pre-built version via require('webtorrent/webtorrent.min.js') and skip the webpack configuration.

Script tag

WebTorrent is also available as a standalone script (webtorrent.min.js) which exposes WebTorrent on the window object, so it can be used with just a script tag:

<script src="webtorrent.min.js"></script>

The WebTorrent script is also hosted on fast, reliable CDN infrastructure (Cloudflare and MaxCDN) for easy inclusion on your site:

<script src="https://cdn.jsdelivr.net/npm/webtorrent@latest/webtorrent.min.js"></script>

Chrome App

If you want to use WebTorrent in a Chrome App, you can include the following script:

<script src="webtorrent.chromeapp.js"></script>

Be sure to enable the chrome.sockets.udp and chrome.sockets.tcp permissions!

In Node.js

WebTorrent also works in node.js, using the same npm package! It's mad science!

NOTE: To connect to "web peers" (browsers) in addition to normal BitTorrent peers, use webtorrent-hybrid which includes WebRTC support for node.

As a command line app

WebTorrent is also available as a command line app. Here's how to use it:

$ npm install webtorrent-cli -g
$ webtorrent --help

To download a torrent:

$ webtorrent magnet_uri

To stream a torrent to a device like AirPlay or Chromecast, just pass a flag:

$ webtorrent magnet_uri --airplay

There are many supported streaming options:

--airplay               Apple TV
--chromecast            Chromecast
--mplayer               MPlayer
--mpv                   MPV
--omx [jack]            omx [default: hdmi]
--vlc                   VLC
--xbmc                  XBMC
--stdout                standard out [implies --quiet]

In addition to magnet uris, WebTorrent supports many ways to specify a torrent.

Talks about WebTorrent

Sep 2017 - Nordic JS - Get Rich Quick With P2P Crypto Currency
May 2017 - Char.la - WebTorrent and Peerify (Spanish)
Nov 2016 - NodeConf Argentina - Real world Electron: Building Cross-platform desktop apps with JavaScript
May 2016 - SIGNAL Conference - BitTorrent in the Browser
May 2015 - Data Terra Nemo - WebTorrent: Mother of all demos
May 2015 - Data Terra Nemo - WebRTC Everywhere
Nov 2014 - JSConf Asia - How WebTorrent Works
Sep 2014 - NodeConf EU - WebRTC Mad Science (first working WebTorrent demo)
Apr 2014 - CraftConf - Bringing BitTorrent to the Web
May 2014 - JS.LA - How I Built a BitTorrent Client in the Browser (progress update; node client working)
Oct 2013 - RealtimeConf - WebRTC Black Magic (first mention of idea for WebTorrent)

Modules

Most of the active development is happening inside of small npm packages which are used by WebTorrent.

The Node Way™

"When applications are done well, they are just the really application-specific, brackish residue that can't be so easily abstracted away. All the nice, reusable components sublimate away onto github and npm where everybody can collaborate to advance the commons." — substack from "how I write modules"

Modules

These are the main modules that make up WebTorrent:

module	tests	description
webtorrent		torrent client (this module)
bittorrent-dht		distributed hash table client
bittorrent-peerid		identify client name/version
bittorrent-protocol		bittorrent protocol stream
bittorrent-tracker		bittorrent tracker server/client
bittorrent-lsd	]	bittorrent local service discovery
create-torrent		create .torrent files
magnet-uri		parse magnet uris
parse-torrent		parse torrent identifiers
render-media		intelligently render media files
torrent-discovery		find peers via dht, tracker, and lsd
ut_metadata		metadata for magnet uris (protocol extension)
ut_pex		peer discovery (protocol extension)

Enable debug logs

In node, enable debug logs by setting the DEBUG environment variable to the name of the module you want to debug (e.g. bittorrent-protocol, or * to print all logs).

DEBUG=* webtorrent

In the browser, enable debug logs by running this in the developer console:

localStorage.debug = '*'

Disable by running this:

localStorage.removeItem('debug')

valverde-marcelo/webtorrent

WebTorrent

The streaming torrent client. For node.js and the web.

Sponsored by

Features

Browser/WebRTC environment features

Install

Ways to help

Who is using WebTorrent today?

WebTorrent API Documentation

Usage

In the browser

Downloading a file is simple:

Seeding a file is simple, too:

Browserify

Webpack

Script tag

Chrome App

In Node.js

As a command line app

Talks about WebTorrent

Modules

The Node Way™

Modules

Enable debug logs

License