Schema Builder for Structured Data

Building validated JSON-LD structured data markup for any webpage is the purpose of Schema Builder for Structured Data, a Chrome extension from schema.dev. It follows the schema.org specification, so the markup you generate uses standard types and properties. The extension helps developers and owners add structured data to a page without writing the JSON by hand, and the validation step catches mistakes before the markup goes live. It is listed among developer tools and is aimed at anyone who works with schema.org types on their pages.