Schema Markup Validator

Identify malformed JSON-LD and missing @context or @type fields.

Evidence, not a scoreLive HTML fetch · deterministic checks · no login · no paid AI tokens

Check a webpage

Passing this syntactic check does not guarantee Schema.org semantic validity or rich results.

What this check can tell you

The tool reports what it actually observes in fetched HTML. It does not verify JavaScript-rendered changes, indexing, Google rich-result eligibility, ranking impact, or social-platform previews.

Some findings are suggestions for human review, not SEO errors. A failed fetch is reported as a failed fetch — never as a missing tag.

Move from diagnosis to continuous improvements

Connect Search Console to prioritize pages with real traffic changes, then plan safe, reviewed improvements using RefreshAgent.

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