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JSON Schema Validator

Validate JSON data against a JSON Schema.

Supports common JSON Schema keywords including type, required, properties, additionalProperties, items, enum, const, length/range rules, allOf, anyOf and oneOf.

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What is JSON Schema Validator?

JSON Schema Validator compares a JSON document against common JSON Schema rules and returns specific validation errors for mismatched structures and values.

What this tool checks

  • JSON syntax
  • type rules
  • required properties
  • properties and additionalProperties
  • array items and uniqueness
  • enum and const
  • string length and pattern
  • numeric ranges
  • allOf, anyOf and oneOf

How to use it

  1. Paste the JSON document.
  2. Paste the JSON Schema.
  3. Run validation.
  4. Review each path-specific validation error.
Important: The current utility implements commonly used JSON Schema keywords. Extremely advanced dialect-specific features may require a dedicated standards-complete validator.

Frequently asked questions

Can it tell me which property failed?

Yes. Validation messages include paths such as $.user.name where possible.

Does it support every JSON Schema draft feature?

No. It focuses on common validation keywords used in everyday API work.

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