API Breaking-Change Detector

Paste or upload the old and new version of an OpenAPI 3.x / Swagger 2.x spec (JSON or YAML). Every difference is judged from a consumer's point of view: a field removed from a response or a new required request field is breaking; a field removed from a request or a changed validation pattern is a warning; new endpoints and optional fields are non-breaking. Local $refs and allOf are resolved.