Schema.org Markup Validator
Official Schema.org structured data and schema markup checker.
100% Free.
What is Schema.org Markup Validator & Schema Markup Checker?
The Schema.org Markup Validator is the official web-based schema markup checker endorsed by the Schema.org community (founded by Google, Microsoft, Yahoo, and Yandex). It allows developers and SEO professionals to inspect and debug structured data embedded in web pages, ensuring adherence to the official Schema.org standards across JSON-LD, Microdata, and RDFa formats.
Core Capabilities of the Schema Markup Checker
Everything needed to validate and audit structured data before pushing to production:
Real-Time Schema Syntax Validation
Scans for missing required attributes, unrecognized Schema.org types, improper JSON formatting, and invalid date or URI formats.
Interactive Split-Screen Code Editor
Allows on-the-fly corrections to your JSON-LD code block and provides instant re-validation without refreshing the page.
Multi-Format Parsing Engine
Accepts modern JSON-LD script tags, legacy Microdata attributes, and RDFa semantic annotations interchangeably.
Frequently Asked Questions: Schema.org Markup Validator
Direct answers regarding safety, usage, limits, and technical details.
You can either enter your live page URL to fetch and parse the HTML automatically, or paste a raw JSON-LD or HTML code snippet directly into the editor pane, then click "Run Test".
Technical Specifications
Editorial Assessment
- Authoritative Schema.org standard schema markup checker
- Pinpoints exact line numbers of missing required schema properties
- Zero ads and completely free
- Validates general Schema.org specifications rather than Google-specific rich snippet eligibility