Generate TypeScript Types from a JSON Payload

Manually writing TypeScript interfaces from a large API response is a chore that Claude can knock out in seconds.

Just paste the JSON and ask:

Convert this API response into TypeScript interfaces.
Use strict types — no `any`. Mark optional fields where they might be absent.

{
  "user": {
    "id": 42,
    "name": "Jane Doe",
    "email": "jane@example.com",
    "roles": ["admin", "editor"],
    "address": {
      "street": "123 Main St",
      "city": "London",
      "postcode": "SW1A 1AA"
    },
    "verified_at": null
  }
}

Claude will produce properly nested interfaces, handle nullable fields with string | null, and use readonly arrays where appropriate — far better than a basic JSON-to-type generator.

You can push further and ask Claude to also generate a Zod schema for runtime validation alongside the static types, or request that it add JSDoc comments explaining each field based on its name and shape.

Also generate a Zod schema that matches these interfaces,
and add JSDoc comments to each field.

Paste the response, get the types — your IDE autocomplete will thank you.