Free Schema Markup Checker
Validate your JSON-LD structured data for AI readiness. Check Schema.org types, completeness, and best practices.
Free: 10 checks per hour
What It Checks
Our schema checker validates all JSON-LD blocks on your page, checks for critical Schema.org types (Organization, WebPage, Article, Product, FAQ, HowTo), evaluates schema completeness and nesting, verifies speakable markup, and ensures your structured data follows Google's and AI agents' recommended practices.
Why It Matters
Structured data is the primary way AI agents understand your content's meaning, context, and relationships. Pages with comprehensive schema markup are significantly more likely to be cited by AI systems. It's the single most impactful factor for Generative Engine Optimization.
How to Fix Issues
Add JSON-LD structured data to your pages using Schema.org vocabulary. Start with Organization and WebSite schemas, then add page-specific types like Article, Product, or FAQ. Ensure all required properties are filled, URLs are absolute, and schema is valid JSON. Use Google's Rich Results Test to verify.
Frequently Asked Questions
Which Schema.org types matter most for AI visibility?
Organization, WebSite, WebPage, Article, FAQ, HowTo, and Product are the most impactful. For AI specifically, speakable markup and author/publisher entities are especially valuable.
Should I use JSON-LD or Microdata?
JSON-LD is strongly recommended. It's easier to implement, maintain, and validate. Google and AI agents prefer JSON-LD, and it can be placed anywhere in the page without affecting HTML structure.
How much structured data is enough?
At minimum, every page should have WebPage or a subtype schema. Add Organization and WebSite on your homepage. Use Article for blog posts, Product for product pages, and FAQ for pages with Q&A content. More complete schemas score higher.
Does structured data help with AI-powered search like ChatGPT?
Yes. While AI models don't read schema the same way Google does, structured data helps AI crawlers understand content context, entity relationships, and page purpose — all of which influence whether your content gets cited.
Ready to optimize for AI?
Start scanning your pages for free — no account required for the Chrome extension. Or sign up for the full dashboard experience.