WebTorrent (https://webtorrent.io) is the first torrent client that works in the browser.

It's written completely in JavaScript – the language of the web – and uses WebRTC for true peer-to-peer transport. No browser plugin, extension, or installation is required. The WebTorrent protocol works just like BitTorrent protocol, except it uses WebRTC instead of TCP/uTP as the transport protocol.

Using open web standards, WebTorrent connects website users together to form a distributed, decentralized browser-to-browser network for efficient file transfer.