JSON Schema Validator

This checks data against a JSON Schema draft-07 subset in your browser: type, required, properties, patternProperties, additionalProperties, items, contains, minItems, maxItems, uniqueItems, minimum, maximum, exclusiveMinimum, exclusiveMaximum, multipleOf, minLength, maxLength, pattern, minProperties, maxProperties, enum, const, format, allOf, anyOf, oneOf, not, if/then/else, dependencies, dependentRequired, dependentSchemas and local $ref pointers into definitions or $defs. Remote $ref URLs are not fetched — nothing leaves the page — and any keyword outside that list is listed as unchecked rather than quietly ignored.