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Free Structured Data & Schema Tool
Free schema markup checker for checking structured data.
Check a page’s JSON-LD schema markup, detected schema types, valid structured data blocks, microdata hints, and common SEO schema signals.
✓ No signup required
✓ On-page SEO checks
✓ Built-in abuse protection
How the schema markup checker works.
This tool fetches the public HTML for a page and extracts JSON-LD structured data blocks plus detected schema types.
Scan JSON-LD schema
The tool checks application/ld+json scripts, schema types, valid JSON-LD, microdata hints, and RDFa hints.
Review structured data
Use the report to catch missing schema, invalid JSON-LD, or structured data types that do not match the page content.
Common schema markup issues this tool can reveal.
Schema markup problems can affect structured data clarity and rich result eligibility.
Missing JSON-LD schema
Pages with no structured data may miss opportunities to clarify content for search engines.
Invalid JSON-LD
Invalid JSON-LD can prevent search engines from understanding your structured data.
Missing relevant schema types
Important pages may benefit from relevant schema types such as Article, FAQPage, BreadcrumbList, WebSite, or Organization.
Schema markup checker FAQ.
Quick answers about JSON-LD, schema markup, structured data, rich results, FAQ schema, Article schema, and BreadcrumbList schema.
What does this schema markup checker test?
It checks JSON-LD blocks, valid structured data, detected schema types, microdata hints, RDFa hints, and common schema types.
What is schema markup?
Schema markup is structured data added to a page to help search engines understand the content more clearly.
What is JSON-LD?
JSON-LD is a common structured data format placed inside application/ld+json script tags.
Does schema guarantee rich results?
No. Schema can help eligibility, but search engines decide whether rich results appear.
Which schema types are useful for SEO?
Useful schema types can include Organization, WebSite, Article, FAQPage, BreadcrumbList, Product, LocalBusiness, and SoftwareApplication depending on the page.
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