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Schema Builder and Validator
Create useful JSON-LD and run basic structural validation.
Public information only. Do not enter passwords, private URLs, or confidential data.
What this schema builder and validator checks and how to act on it
The schema builder and validator drafts JSON-LD for common page types, WebPage, BreadcrumbList, FAQPage, HowTo, Article, and Product, and validates an existing page's structured data for syntax and for the mismatch that matters most: markup describing content that is not visible on the page. Google's guidelines require marked-up content to be visible, and violations are among the few schema issues that draw manual actions.
On programmatic sites, generate schema from the same content object that renders the visible page so the two cannot drift, and validate a random sample after every template change. Structured data is not a ranking factor; its value is accurate description at scale for search engines and for AI systems that read it.
Read the guide
Step-by-step explanations of what this tool checks and how to fix what it finds.