This tool reads JSON on stdin and generates Open API Spec components based on the data types it finds. It's very basic at the moment, but it's a great starting point to start modifying by hand
Installation
npm install -f json-to-oas-component-cli
Usage
$ echo '{"foo":"bar", "baz": [{"hello":"world"}]}' | node json-to-oas-component
components: schemas: AnonymousObject: foo: type: string maxLength: 32 description: Description goes here example: bar baz: type: array items: type: object properties: hello: type: string maxLength: 32 description: Description goes here example: world