Serves JSON files through REST routes.

JSON Server

Get a full fake REST API with zero coding in less than 30 seconds (seriously)

Created with <3 for front-end developers who need a quick back-end for prototyping and mocking.

For a live running version, see JSONPlaceholder.

Create a db.json file

  "posts": [
    { "id": 1, "title": "json-server", "author": "typicode" }
  "comments": [
    { "id": 1, "body": "some comment", "postId": 1 }

Start JSON Server

$ json-server db.json

Now if you go to http://localhost:3000/posts/1, you'll get

{ "id": 1, "title": "json-server", "author": "typicode" }

Also, if you make POST, PUT, PATCH or DELETE requests, changes will be saved to db.json

Here are all the available routes.

GET   /posts
GET   /posts/1
GET   /posts/1/comments
GET   /posts?title=json-server&author=typicode
POST  /posts
PUT   /posts/1
PATCH /posts/1
DEL   /posts/1

To slice resources, add _start and _end. An X-Total-Count header is included in the response.

GET /posts?_start=0&_end=10
GET /posts/1/comments?_start=0&_end=10

To sort resources, add _sort and _order (ascending order by default).

GET /posts?_sort=views&_order=DESC
GET /posts/1/comments?_sort=votes&_order=ASC

To make a full-text search on resources, add q.

GET /posts?q=internet

Returns database.

GET /db

Returns default index file or serves ./public directory.

$ npm install -g json-server

You can use JSON Server to serve your HTML, JS and CSS, simply create a ./public directory.

You can access your fake API from anywhere using CORS and JSONP.

You can load remote schemas:

$ json-server http://example.com/file.json
$ json-server http://jsonplaceholder.typicode.com/db

You can use JS to programmatically create data:

module.exports = function() {
  data = { users: [] }
  // Create 1000 users 
  for (var i = 0; i < 1000; i++) {
    data.users.push({ name: 'user' + i })
  return data
$ json-server index.js

You can use JSON Server as a module:

var jsonServer = require('json-server')
var server = jsonServer.create()         // Express server 
server.use(jsonServer.defaults)          // Default middlewares (logger, public, cors) 
server.use(jsonServer.router('db.json')) // Express router 

For an in-memory database, you can pass an object to jsonServer.route().

You can deploy JSON Server. For example, JSONPlaceholder is an online fake API powered by JSON Server and running on Heroku.

MIT - Typicode