JSON Schema Validator
Validate JSON against a Draft-07 schema — offline, fast and precise.
What is JSON Schema Validator?
JSON Schema Validator checks a JSON document against an explicit schema and reports where the data violates that contract. It is valuable for API payloads, configuration files, imports, events, and test fixtures whose syntax may be valid while required fields or value types are still wrong.
How to use JSON Schema Validator
Provide the JSON data and the JSON Schema, run validation, and review whether the data satisfies the schema rules.
When is JSON Schema Validator useful?
JSON Schema Validator is useful when testing API payloads, backend validation rules, fixtures, or structured configuration before integration.
Example
A practical example is validating a user object against a schema that requires an id, email, and role.
Practical notes
This tool supports JSON Schema Draft-07 with standard formats and local references. Other drafts, unknown keywords or formats, asynchronous schemas and unresolved external references produce a schema error. Resolve errors from the outer structure inward, test valid and invalid examples, and remember that business rules spanning multiple fields may require application logic beyond JSON Schema.