Online Tools

JSON Schema Validator

Validate JSON data against a JSON Schema draft with detailed error reporting.

Ctrl+Enter to validate

Step by step

How to use JSON Schema Validator

  1. 1

    Paste the JSON instance and the JSON Schema that should describe it.

  2. 2

    Validate both documents and review every returned path-specific error.

  3. 3

    Correct the instance or schema until the result matches the contract you intend to enforce.

Capabilities

What this tool handles

  • Supports Draft 7 subset
  • Collects all validation errors
  • Local refs with $defs

Common uses for JSON Schema Validator

  • Test API request and response examples against a schema during development.
  • Debug required fields, types, enums, arrays, and local definition references.

What to check before using the result

The validator supports a documented Draft 7 subset and should not replace the production validator when unsupported keywords affect the contract.

Privacy and accuracy

Questions about JSON Schema Validator

Does this tool upload my input?

The conversion or analysis runs in your browser. The application does not intentionally send the value you enter to a processing API. Standard hosting infrastructure can still receive request metadata when the page loads; see the privacy page for details.

Can I rely on the output without checking it?

Use the result as a focused development aid and verify it in the system where it will be used. Test representative edge cases and confirm the destination uses the same format, standard, and assumptions described on this page.

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