What is a breaking change?

A breaking change is a schema or contract change that can make existing consumers fail, such as removing required elements or tightening types.

Does this fetch external imports?

No. The UI validates local syntax only and does not fetch external imports or includes.

What should I validate before release?

Validate representative payloads, schema compatibility, and any security or namespace warnings reported here.

JSON ⇄ JSON Schema Validator

Validate JSON payloads against JSON Schema with draft selection, detailed error paths, and pass/fail results. Free JSON Schema validator by Graph Tools.

Use this free JSON Schema validator to check any JSON payload against a JSON Schema definition. Select the JSON Schema draft (Draft-04 through 2020-12), paste your schema and JSON document, and get a clear pass/fail report with detailed error messages and paths for every validation failure. Useful for API testing, form validation, and contract enforcement.

Related Tools

JSON Schema Example Generator
JSON Schema → OpenAPI Schema Converter
CSV → JSON Schema Generator