Simple, secure^[1] & standards compliant^[2] web server for the most demanding^[3] of applications. Read more...

💡 In a nutshell

Think of it as a complete replacement to both Express.js and Socket.IO, written entirely in C/C++ for maximum performance and reliability. Browse the documentation. There are tons of examples but here's the gist of it all:

/* Non-SSL is simply App() */
require('uWebSockets.js').SSLApp({

  /* There are tons of SSL options */
  key_file_name: 'misc/key.pem',
  cert_file_name: 'misc/cert.pem',
  
}).ws('/*', {

  /* For brevity we skip the other events */
  message: (ws, message, isBinary) => {
    let ok = ws.send(message, isBinary);
  }
  
}).any('/*', (res, req) => {

  /* Let's deny all Http */
  res.end('Nothing to see here!');
  
}).listen(9001, (listenSocket) => {

  if (listenSocket) {
    console.log('Listening to port 9001');
  }
  
});

🚀 Ready all thrusters

Install with npm install uNetworking/uWebSockets.js#v18.1.0 or any such release. No compiler needed.

Real-world tests over TLS 1.3 and Ethernet puts us 5x as efficient as Socket.IO, 2x as efficient as websockets/ws.

💵 Pay what you want

Commercially developed on a sponsored/consulting basis; BitMEX, Bitfinex and Coinbase are current or previous sponsors. Contact me, the author for support, feature development or consulting/contracting.

🎓 Know thy legal matters

µWebSockets.js is intellectual property licensed Apache 2.0 with limitations on trademark use. Forks must be clearly labelled as such and must not be confused with the original.