Schema Validator

Schema Validator: check structured data online

Schema.org is a shared vocabulary that search engines use to better understand page content and build rich snippets — star ratings, FAQs, breadcrumbs, product prices — directly in search results. The most common format is JSON-LD: a <script type="application/ld+json"> block independent of the page's HTML markup.

What the tool checks

• Finds every JSON-LD block on the page, including nested items under @graph
• Detects the Schema.org type of each object (Article, Product, FAQPage, LocalBusiness, etc.)
• Checks for fields Google considers required for rich results of that type
• Flags syntactically invalid JSON that search engines will simply ignore

Frequently asked questions

• What does this tool check?

  Fetches the page, extracts all JSON-LD blocks, detects type, and checks Google's required/recommended fields for common Schema.org types.

• How is this different from Rich Results Test?

  Google's official tool checks eligibility for specific rich result features and may have rate limits. This is a fast independent structural check with no restrictions.

• No JSON-LD found — is that bad?

  It means the page doesn't use JSON-LD structured data. Not an indexing error, but adding markup can improve the search snippet.

See also

• Open Graph Checker — check og: and twitter: tags
• CMS Detection — identify a site's CMS
• HTTP Headers — server response headers