Structured data formats: what it measures

The check reads the response your server returns and records what it found. That observation is stored with the report, so reopening an old audit shows what was true on the day it ran rather than what the page says now. It is not a live measurement, and it is not a model’s opinion of your page.

Ruleset schema-presence · category schema · can count towards the checklist score

• —Whether the markup is valid. That is the JSON-LD syntax check.
• —Whether the values are true statements about the business.

Add JSON-LD for the entity the page represents, when the page actually represents one.

Then verify it yourself rather than trusting the next report: reload the page, view the source, and look at the thing the check described. A check you can falsify in ten seconds is the only kind worth having.

The free schema validator checks this on one URL and needs no signup — the same rule, on the same page, with no credit spent. When you want the whole page assessed, an audit is covered by the trial credit.

• JSON-LD syntax
• JSON-LD context
• Common schema properties

All checks and their definitions as JSON