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.

JSON Schema Validator

JSON

{
  "id": 42,
  "email": "ana@example.com",
  "roles": ["admin"]
}

JSON Schema

{
  "type": "object",
  "required": ["id", "email"],
  "properties": {
    "id": { "type": "number" },
    "email": { "type": "string", "pattern": "@" },
    "roles": { "type": "array", "items": { "type": "string" } }
  },
  "additionalProperties": false
}

Validation result

JSON is valid for this schema.

How to validate JSON with a schema

Paste JSON and a JSON Schema to find missing fields, type mismatches, enum errors, and common rule violations.

How to use it

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

What the result includes

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

Good inputs

Use representative sample data before applying the result to production work.
Check warnings and edge cases shown by the tool.
Copy only the final output once it matches your expected format.

Local processing

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