JSON to TypeScript Interface

Paste any JSON and get TypeScript interface definitions instantly. Handles nested objects, arrays, optional fields, and custom root names. 100% client-side.

Root interface name

Optional fields (?)Add export

JSON input

TypeScript interfaces

export interface Address {
  street: string;
  city: string;
  zip: string;
}

export interface User {
  id: number;
  name: string;
  email: string;
  isPro: boolean;
  score: number;
  tags: (string)[];
  address: Address;
}

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