JSON → TypeScript

generate interfaces from a JSON sample: nested objects, arrays, union types, optional fields

JSON

Root type name

New keys as optional

TypeScript

export interface Root {
  id: number;
  name: string;
  price: number;
  in_stock: boolean;
  tags: string[];
  sizes: Sizes[];
  meta: Meta;
}

Everything runs locally in the browser — nothing is sent anywhere. Same-named objects in different places merge into one interface; mixed-type arrays become unions. For production, validate the result with zod/io-ts if runtime checking is needed.

About Json To Types

Json To Types — free online tool on usefulhub.cloud. IT Tools: Developer utilities. Use our tools without registration or installing software. All calculations happen in your browser — your data is never sent to a server.