About Schema Technology

Schema Technology is a free tool for writing and checking schema.org structured data. It has two parts: a generator for the seven types most websites need, and a validator that checks JSON-LD against Google's documented rules.

Who built it. Schema Technology is built by Joel Maldonado (Joel David Maldonado), founder of Neural Command, LLC, which runs NRLC.ai. Neural Command, LLC is at 1639 11th St, Suite 110-A, Santa Monica, CA 90404, and can be reached at contact@neuralcommandllc.com.

Privacy. Everything runs in your browser. There is no account, no tracking and no server-side processing of what you type or paste.

What it won't do. It has no fields for review stars or ratings. Review markup is only allowed for real reviews shown on the page, and Google does not show stars for reviews a business publishes about itself, so a generator that makes them up would only create risk.

Sources. Rules come from Google Search Central's structured data documentation and schema.org, checked in October 2026. How the checks work lists each rule and its source. Found a mistake? Email the address above.

Related. Schema Institute explains each schema.org type in plain English. Ontology Courses has short lessons on entities and knowledge graphs.