Schema Markup Validator
Validate JSON-LD structured data against Schema.org standards. Check syntax, debug missing required properties, and preview Google Rich Results eligibility.
Validation Diagnostics
VALID SCHEMAInspect Schema & Meta Tags with 1 Click in Chrome
The OsaniRank Chrome Extension extracts JSON-LD schemas, OpenGraph tags, and Moz Domain Authority on every webpage you browse.
What Is Schema Markup & Why Does Structured Data Matter?
Schema markup is code (structured data) that you put on your website to help search engines understand the context of your content. While search engine crawlers are skilled at reading human text, structured data provides an unambiguous machine-readable layer that declares whether a number is a price, a rating, or an ISBN.
When Google understands your content through schema, it can display Rich Results — visual enhancements such as star ratings, pricing, FAQ accordions, author credentials, and sitelinks search boxes. Studies show that rich results can lift search click-through rates (CTR) by 20% to 35% compared to standard blue link listings.
Higher Search CTR
Eye-catching rich snippets (star ratings, thumbnail carousels, and FAQs) take up more vertical SERP screen space, capturing user attention over plain listings.
Knowledge Graph Entity
Organization and Person schemas help Google connect your brand entity to official social accounts, author profiles, and Wikipedia/Wikidata entries.
Voice & AI Search Readiness
Large language models and voice assistants (Google Assistant, Perplexity, ChatGPT) parse structured data directly to synthesize direct answers.
JSON-LD vs Microdata vs RDFa: Which Is Best?
| Format | Implementation | Google Preference | Maintenance Complexity |
|---|---|---|---|
| JSON-LD | <script type="application/ld+json"> | Strongly Recommended | Low — isolated in script tags, never breaks page CSS layout. |
| Microdata | itemscope itemtype="..." | Supported (Legacy) | High — tightly coupled with HTML markup; theme edits easily break schema. |
| RDFa | vocab="..." typeof="..." | Supported (Rare) | High — complex HTML attribute syntax rarely adopted by modern CMSs. |
Google\'s Quality Guidelines: Avoiding Schema Penalties
Content marked up in JSON-LD must be visible to human visitors on that page. Adding hidden FAQs, fake reviews, or pricing not shown to users triggers Google structured data manual actions.
Use the most specific type available from Schema.org. For instance, prefer TechArticle or NewsArticle over generic CreativeWork.
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Frequently Asked Questions
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