Instantly generate JavaScript from JSON

Generate JavaScript models from JSON, JSON Schema, Postman collections, and GraphQL queries.

quicktype is fluent in

Install quicktype with npm

$ npm install -g quicktype$ npm install -g quicktype

Generate JavaScript for a simple JSON sample$ echo '[1, 2, 3.14]' | quicktype --lang javascript$ echo '[1, 2, 3.14]'", "| quicktype -l javascriptGenerate JavaScript for a sample JSON file

$ quicktype person.json -o Person.js$ quicktype person.json -o Person.js

Generate JavaScript from a directory of samples

$ ls spotify-api-samples$ ls spotify-api-samples

album.json artist.json track.json$ quicktype spotify-api-samples -o SpotifyClient.js$ quicktype -o QTSpotifyClient.js", "spotify-api-samples

A better way to work with APIs.

The old way

Find a client library: A good one is golden, however most are outdated or simply unavailable in your app’s programming language.
Write your own client library: Takes a lot of effort and must be updated when the API changes. You should be focused on your app, anyway.
Read API data as dynamic, untyped values: This is an unpleasant way to program and leaves your app vulnerable to API changes.

With quicktype

Generate your client libraries: Given sample API responses, quicktype will generate an easy-to-use client library in your app’s language.
Spend more time on your app: quicktype can regenerate types when APIs change, so you can simply update affected app code, if any.
Access strongly typed API data with help: Get more out of your editor or IDE (autocomplete, refactoring) when working with typed API data.