JSON Schema Validator

Validate JSON data against a JSON Schema.

JSON Schema Validation

JSON Schema defines the structure JSON data should have - required fields, data types, allowed values. This tool validates JSON against a schema and reports any mismatches.

Useful for API development where you need to ensure requests and responses match the expected format. Catch structure errors before they cause runtime bugs.

What Schemas Validate

  • Required and optional properties
  • Data types (string, number, boolean, array, object, null)
  • Value constraints (min/max, patterns, enums)
  • Nested object structure
  • Format validation (email, uri, date, uuid)