This post was originally published at Dweb: Serving the Web from the Browser with Beaker

In this series we are covering projects that explore what is possible when the web becomes decentralized or distributed. These projects aren’t affiliated with Mozilla, and some of them rewrite the rules of how we think about a web browser. What they have in common: These projects are open source, and open for participation, and share Mozilla’s mission to keep the web open and accessible for all.

So far we’ve covered distributed social feeds and sharing files in a decentralized way with some new tools for developers. Today we’d like to introduce something a bit different: Imagine what an entire browser experience would be like if the web was distributed… Beaker browser does exactly this! Beaker is a big vision from a team who are proving out the distributed web from top to bottom. Please enjoy this post from Beaker co-creator Tara Vancil. – Dietrich Ayala

Blue Link Labs and Beaker

We’re Blue Link Labs, a team of three working to improve the Web with the Dat protocol and an experimental peer-to-peer browser called Beaker.

Blue Link Labs team

We work on Beaker because publishing and sharing is core to the Web’s ethos, yet to publish your own website or even just share a document, you need to know how to run a server, or be able to pay someone to do it for you.

So we asked ourselves, “What if you could share a website directly from your browser?”

Peer-to-peer protocols like dat:// make it possible for regular user devices to host content, so we use dat:// in Beaker to enable publishing from the browser, where instead of using a server, a website’s author and its visitors help host its files. It’s kind of like BitTorrent, but for websites!


Beaker uses a distributed peer-to-peer network to publish websites and datasets (sometimes we call them “dats”).

dat:// websites are addressed with a public key as the URL, and each piece of
data added to a dat:// website is appended to a signed log. Visitors to a dat://
website find each other with a tracker or DHT, then sync the data between each other, acting both as downloaders and uploaders, and checking that the data hasn’t been tampered with in transit.

a basic illustration of the dat:// network

At its core, a dat:// website isn’t much different than an https:// website — it’s a collection of files and folders that a browser interprets according to Web standards. But dat:// websites are special in Beaker because we’ve added peer-to-peer Web APIs so developers can do things like read, write, and watch dat:// files and build peer-to-peer Web apps.

Create a P2P Website

Beaker makes it easy for anyone to create a new dat:// website with one click (see our tour). If you’re familiar with HTML, CSS, or JavaScript (even just a little bit!) then you’re ready to publish your first dat:// website.

Developers can get started by checking out our API documentation or reading through our guides.

This example shows a website editing itself to create and save a new JSON file. While this example is contrived, it demonstrates a common pattern for storing data, user profiles, etc. in a dat:// website—instead of application data being sent away to a server, it can be stored in the website itself!

// index.html

Submit message

<script src="index.js"></script>

// index.js

// first get an instance of the website's files
var files = new DatArchive(window.location)

document.getElementById('create-json-button').addEventListener('click', saveMessage)

async function saveMessage () 
var timestamp =
var filename = timestamp + '.json'
var content = 
message: document.getElementById('message').value

// write the message to a JSON file
// this file can be read later using the DatArchive.readFile API
await files.writeFile(filename, JSON.stringify(content))

Learn More

We’re always excited to see what people build with dat:// and Beaker. We especially love seeing when someone builds a personal site or blog, or when they experiment with Beaker’s APIs to build an app.

There’s lots to explore on the peer-to-peer Web!

Follow this link – 

This post was originally published at Dweb: Serving the Web from the Browser with Beaker