JSON to TypeScript Interface

Paste JSON and generate TypeScript interfaces with inferred nested object and array types.

Root Type Name

JSON Input

TypeScript Output

export interface RootObject {
  id: number;
  name: string;
  active: boolean;
  tags: string[];
  owner: Owner;
}

export interface Owner {
  email: string;
  roles: string[];
}

100% free — no account needed
Runs in your browser
Nothing is uploaded

Frequently asked questions

What input format does this converter accept?

Paste valid JSON such as an object or array, and the tool infers matching TypeScript types.

Does it generate nested interfaces automatically?

Yes. Nested objects and arrays are converted into generated interfaces and typed array fields.

Can I customize the root interface name?

Yes. Set your own root type name before generating the TypeScript output.

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