Free Schema Markup Checker
Validate your structured data for precision SEO. Audit your JSON-LD, Microdata, and RDFa markup for errors and schema.org compliance.
Why Structured Data is Essential for 2025
Structured data provides a standard way to give search engines information about your page. It helps Google understand that a sequence of numbers is a 'price' or that a name is an 'author.' This clarity is crucial for winning rich results and improving AI search relevance.
Recommended guides
Use these guides to fix the issues you found and improve your SEO performance.
Professional Schema Validation
Nuwtonic's Schema Checker uses strict validation rules based on schema.org standards. We help you find hidden syntax errors and 'property mismatch' issues that basic validators might miss, ensuring your structured data is perfectly readable by search engines.
What is a Schema Markup Checker?
A schema markup checker is a technical SEO validator that inspects your code (JSON-LD, Microdata, etc.) for syntax errors, mandatory properties, and compliance with the official Schema.org vocabulary.
How to Validate Your Schema Code
Enter your page URL or paste your JSON-LD markup directly.
Click 'Validate' to begin the technical code audit.
Review the detected schema types and property status.
Fix any red syntax errors or yellow 'missing property' warnings.
Understanding Your Validation Report
Valid Schema
Your code is technically correct and follows all mandatory syntax rules.
Invalid Markup
Critical syntax errors found. Search engines will likely ignore this schema entirely.
Missing Properties
You've missed recommended fields that could improve your search presence.
Types Detected
Specific schema categories (e.g., Product, Organization) found in your code.
Schema Markup FAQ
What is JSON-LD schema?
JSON-LD is the format Google recommends for adding structured data to a page. It's easy to implement and doesn't interfere with your page's visual design.
How does schema markup help SEO?
It helps search engines understand the meaning of your content, which can lead to better indexing, rich results, and higher relevance for specific queries.
Where should I put schema markup on my page?
Google recommends placing JSON-LD in the '<'head'>' or '<'body'>' section of your HTML. Most SEO plugins handle this placement for you.
Is Schema.org the same as Google Schema?
Schema.org is the collaborative vocabulary used by all major search engines. Google follows these standards but has its own specific requirements for rich results.
Can I have multiple schema types on one page?
Yes! You can have several types (e.g., WebPage, Article, and FAQ) on a single page to provide as much context as possible.
How often should I validate my schema?
Whenever you make changes to your site's templates or add new types of content, you should run a validation check to ensure everything is still correct.
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