Free browser-based converter

JSON to TypeScript Converter

Turn raw API responses into TypeScript interfaces without hand-writing every field. Typify infers nested objects, arrays, and optional properties so you can move from sample data to typed code in seconds.

Everything runs client-side in your browser, which makes it useful for quick schema drafting, debugging payloads, and cleaning up mock data during frontend work.

Output mode

JSON input

188 / 50 KB

→

TypeScript interfaces

export interface Settings {
  region: string;
  retries: number;
}

export interface Project {
  id: number;
  name: string;
  active: boolean;
  maintainers: string[];
  settings: Settings;
}

export interface Root {
  project: Project;
}

Example

Start with the sample below, then replace it with your own data to generate output instantly.

Input JSON

{
  "project": {
    "id": 101,
    "name": "Typify",
    "active": true,
    "maintainers": ["Ada", "Grace"],
    "settings": {
      "region": "us-east-1",
      "retries": 3
    }
  }
}

TypeScript output

export interface Root {
  project: Project;
}

export interface Project {
  id: number;
  name: string;
  active: boolean;
  maintainers: string[];
  settings: Settings;
}

export interface Settings {
  region: string;
  retries: number;
}