Schema Markup Checker
Detect JSON-LD structured data on a webpage and review the Schema.org types the page declares.
What is a Schema Markup Checker?
Structured data gives machines explicit information about entities and content on a webpage. JSON-LD is a common format for implementing Schema.org vocabulary.
Why this check matters for SEO
Valid structured data can help search engines understand eligible content, but markup must accurately represent what users can see and does not guarantee a rich search result.
SEO best practices
- Use schema types that genuinely describe the visible content.
- Keep structured data consistent with page information.
- Do not mark up fabricated reviews, ratings or content.
- Validate important implementations after template changes.
Schema Markup Checker FAQs
Does schema guarantee rich results?
No. Correct structured data can make content eligible for supported search features, but search engines decide whether to display them.
What is JSON-LD?
JSON-LD is a structured-data format commonly embedded in a script element within a webpage.
Can I add every schema type to a page?
No useful purpose is served by unrelated markup. Use types that accurately describe the page and follow applicable search-engine requirements.
Validate relevant JSON-LD structured data
JSON-LD can describe organisations, articles and eligible page types, but a detected script is not proof that it is valid or eligible for a special Google result.
How to interpret a result
An Article page can contain facts such as its headline and real author. It should not claim a rating, price or review count that is not visible and supported by the page.
Example only — this is not a result from a real customer scan.
What to do next
- Inspect the detected JSON-LD type and fields.
- Confirm the markup describes the visible subject accurately.
- Use the Schema Markup Validator and applicable Google Rich Results Test for eligible content.
- Correct malformed JSON or inaccurate details, then retest.
Common mistake to avoid
Adding many unrelated schema types will not manufacture rich results and can misrepresent the content.
Need to check more than one page? Start with a free SEO Scan Lab summary, then review a full crawl if you need site-wide coverage and the source URLs behind issues.