Free Schema Markup Checker

Find JSON-LD blocks and validate basic parseability.

Detect structured data scripts and catch invalid JSON-LD that blocks rich results.

Try it now — free

Instant results for any public URL. We may email follow-up tips; no credit card required for this check.

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About this free schema / json-ld checker

Structured data powers rich results — FAQs, products, breadcrumbs, and more. Invalid JSON-LD silently removes eligibility.

Scan any URL for JSON-LD blocks and basic parse validity before you debug in Google Rich Results Test.

What it checks

  • JSON-LD script blocks in the document
  • Whether JSON parses without syntax errors
  • Types declared (@type) at a high level

Why it matters for SEO

  • Rich snippets increase visibility and CTR for eligible queries.
  • Broken schema wastes implementation time and can trigger Search Console warnings.
  • Supports entity clarity for products, articles, and organizations.

How to use this tool

  1. Run the URL after deploying schema changes.
  2. Fix syntax errors and redeploy.
  3. Validate critical templates (product, article) in Google’s Rich Results Test for full eligibility.

Common issues we help you catch

  • Trailing commas or unescaped characters breaking JSON
  • Multiple conflicting Organization schemas
  • Required properties missing for the intended rich result type

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Frequently asked questions

Does schema guarantee rich results?
No — Google chooses when to show enhancements. Valid, relevant schema is a prerequisite, not a promise.