Can I use this for production types directly?

Use as a draft, then refine based on real schema rules.

Does it infer optional fields perfectly?

Only from the provided sample data.

Most PlainUtils tools process inputs directly in your browser unless a page explicitly says otherwise.

Developer Utility

Generate TypeScript interfaces from JSON samples.

Language: JSONUtility: ConvertUtility: Generate

JSON

{
  "id": 1,
  "name": "Project",
  "owner": {"email": "alice@example.com"}
}

TypeScript Interfaces

interface RootObjectOwner {
  email: string;
}

interface RootObject {
  id: number;
  name: string;
  owner: RootObjectOwner;
}

interface RootObjectOwner {
  email: string;
}

interface RootObject {
  id: number;
  name: string;
  owner: RootObjectOwner;
}

Generate starter interfaces from sample payloads to speed up strongly-typed frontend and API work.

Use it to inspect or transform input quickly, then carry validated output into code, tests, or API requests.

Can I use this for production types directly?
Use as a draft, then refine based on real schema rules.
Does it infer optional fields perfectly?
Only from the provided sample data.
Does this tool send data to a backend?
Most tools process input client-side in your browser unless explicitly noted.