Fast and low overhead web framework, for Node.js
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Latest commit 70ac47a Mar 8, 2018

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An efficient server implies a lower cost of the infrastructure, a better responsiveness under load and happy users. How can you efficiently handle the resources of your server, knowing that you are serving the highest number of requests as possible, without sacrificing security validations and handy development?

Enter Fastify. Fastify is a web framework highly focused on providing the best developer experience with the least overhead and a powerful plugin architecture. It is inspired by Hapi and Express and as far as we know, it is one of the fastest web frameworks in town.


npm i fastify --save


// Require the framework and instantiate it
const fastify = require('fastify')()

// Declare a route
fastify.get('/', function (request, reply) {
  reply.send({ hello: 'world' })

// Run the server!
fastify.listen(3000, '', function (err) {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)

with async-await:

const fastify = require('fastify')()

fastify.get('/', async (request, reply) => {
  return { hello: 'world' }

fastify.listen(3000, '', function (err) {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)

Do you want to know more? Head to the Getting Started.


.listen binds to the local host,, interface by default. See the documentation for more information.

Core features

  • Highly performant: as far as we know, Fastify is one of the fastest web frameworks in town, depending on the code complexity we can serve up to 30 thousand requests per second.
  • Extendible: Fastify is fully extensible via its hooks, plugins and decorators.
  • Schema based: even if it is not mandatory we recommend to use JSON Schema to validate your routes and serialize your outputs, internally Fastify compiles the schema in a highly performant function.
  • Logging: logs are extremely important but are costly; we chose the best logger to almost remove this cost, Pino!
  • Developer friendly: the framework is built to be very expressive and help the developer in their daily use, without sacrificing performance and security.


Machine: Intel Xeon E5-2686 v4 @ 2.30GHz (4 cores, 8 threads), 16GiB RAM (Amazon EC2 m4.xlarge)

Method:: autocannon -c 100 -d 40 -p 10 localhost:3000 * 2, taking the second average

Framework Version Router? Requests/sec
micro (microrouter) 9.1.0 (microrouter@3.1.1 ) 18,314
hapi 17.2.1 18,402
Express 4.16.2 19,401
spirit (spirit-router) 0.6.1 (spirit-router@0.5.0) 20,923
total.js 2.9.4 21,992
Restify 6.3.4 22,039
Koa (koa-router)  2.5.0 (koa-router@7.4.0) 22,737
Koa 2.5.0 23,115
take-five 1.3.4 23,597
connect (router) 3.6.6 (router@1.3.2) 27,066
spirit 0.6.1 31,013
Fastify 1.0.0 31,634
micro 9.1.0 31,793
connect 3.6.6 31,925
http.Server 8.9.4 34,680

Benchmarks taken using This is a synthetic, "hello world" benchmark that aims to evaluate the framework overhead. The overhead that each framework has on your application depends on your application, you should always benchmark if performance matters to you.



  • Core - Core plugins maintained by the Fastify team.
  • Community - Community supported plugins.



Fastify is the result of the work of a great community. Team members are listed in alphabetical order.

Long Term Support

Fastify's support schedule is detailed in the LTS document.

Lead Maintainers



This project is kindly sponsored by:


Licensed under MIT.