CodeCraft

JSON Schema Validator

Validate JSON data against a JSON Schema (Draft-07). Supports required, type, format, minimum, and more. Powered by Ajv.

✓ Draft-07✓ Powered by Ajv✓ 100% Local

JSON Schema

JSON Data

How to Use

  1. Write or paste your JSON Schema in the left editor to define the expected data structure.
  2. Paste the JSON data you want to validate in the right editor.
  3. Click Validate. The tool uses Ajv to check the data against the schema.
  4. A green banner means the data is valid. Errors are listed with the field path and a description of each issue.
  5. Use the 'Try invalid data' and 'Try valid data' buttons to quickly switch between example inputs.

About JSON Schema Validator

JSON Schema defines the structure, types, and constraints a JSON document must follow. It is the standard for API request/response validation. Schema specifies field types (string, number, boolean, array, object, null), required fields, value ranges, and string formats (email, uri, date-time). This tool uses Ajv for browser-side validation supporting Draft-07 and above. All validation runs locally.

Frequently Asked Questions

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