Does this tool upload my input?

No. It runs locally in your browser and does not send the input to a ProntoUso server.

Can I use the result directly?

Yes, but review it first when the output affects production code, SEO files, campaigns, or business calculations.

The tool shows a clear error or warning so you can fix the input before using the result.

Root name

{
  "user": {
    "id": 1,
    "name": "Ana",
    "roles": ["admin", "editor"]
  }
}

export interface ApiResponseUser {
  id: number;
  name: string;
  roles: (string)[];
}

export interface ApiResponse {
  user: ApiResponseUser;
}

Infer TypeScript interfaces from JSON samples so API responses and fixtures are easier to type.

Enter or load your data, adjust the available options, and review the generated result before copying or downloading it.

JSON to TypeScript focuses on the practical output most users need first, with clear validation messages when the input cannot be processed.

This tool runs in your browser. The content you enter or the files you choose are not sent to a ProntoUso server.

Does this tool upload my input?: No. It runs locally in your browser and does not send the input to a ProntoUso server.
Can I use the result directly?: Yes, but review it first when the output affects production code, SEO files, campaigns, or business calculations.
What happens if the input is invalid?: The tool shows a clear error or warning so you can fix the input before using the result.

Generate standards-friendly UUID values locally.

Format JSON, convert YAML, and clean up XML in the browser.

Create QR codes and read QR images locally.