Structured Data Validator
Find and validate JSON-LD schema.org markup on any page.
Free. No account needed. We analyze the page you enter and show only what we actually measured.
What this validator checks
This tool finds every JSON-LD structured-data block on your page, parses each one, and reports which are valid, which fail (with the parser error), and the schema.org @type values they declare. It also detects microdata (itemscope) markup.
Structured data is how search engines and AI answer engines understand what a page is about — an article, a product, an FAQ, an organization. Invalid JSON-LD is silently ignored by crawlers, so a single syntax error can drop you out of rich results. This tool surfaces those errors directly.
We also cross-check content against markup: if a page reads like an FAQ but has no FAQPage schema, that's a missed opportunity for rich results and AI citations — exactly the kind of gap a full SEOGEO Tools audit tracks across your whole site.