Generate TypeScript interfaces from JSON

JSON in, TypeScript out.

Paste a JSON object. Get TypeScript interfaces. Handles nested objects, arrays, union types, and nullable fields. Pure browser; no login.

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Input (JSON)

Output (TypeScript)

export interface Address_ {
  city: string;
  zip: string;
}

export interface Root {
  name: string;
  age: number;
  tags: string[];
  address: Address_;
}