Turn JSON into typesafe code in any language.

{
  "people": [
    { "name": "Atticus",
      "high score": 100 },
    { "name": "Cleo",
      "high score": 900 },
    { "name": "Orly" },
    { "name": "Jasper" }
  ]
}

Start with what you have: sample JSON,
API URLs, JSON Schema, or GraphQL queries.

class MyData {
  people: Person[];
  
  static fromJson(json: string) {…}
}

class Person {
  name: string;
  highScore: int?;
}

quicktype infers the types and generates
models, serializers, and validators.

let data = MyData.fromJson('{
  "people": [ { "name": "Olivia" } ]
}')

for person in data.people {
  print(person.name)
  person.highScore++
}

highScore may be undefined

Ship code that your compiler, your IDE,
and your AI agent can all reason about.