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SEO & PerformanceFree In-Browser / WASM

Schema.org Markup Validator

Official Schema.org structured data and JSON-LD validator.

Visit Official Website
🔒 External link to validator.schema.org. Verified clean & active.
Account Required No signup needed
Pricing StructureFree
Execution ModeClient-Side (In-Browser)
Last Inspected2026-08-27

About Schema.org Markup Validator

Maintained by the Schema.org community, this validator checks structured data embedded in web pages. It tests for syntax errors, missing mandatory properties, invalid type nestings, and schema conformance for entities like Organizations, Products, Articles, FAQs, Breadcrumbs, and WebSites.

Best for: Technical SEO specialists and web engineers implementing rich structured data.

Pros & Cons Analysis

What We Liked
  • Authoritative Schema.org standard conformance testing
  • Pinpoints exact line numbers of missing required schema properties
  • Zero ads and completely free
Considerations & Limits
  • Validates general Schema.org specifications rather than Google-specific rich snippet eligibility

Key Features & Capabilities

Official Schema.org standard validation
Validates JSON-LD, Microdata, and RDFa markup formats
Interactive split-pane code editor to fix syntax errors live
Direct URL scraping or code snippet testing

Pricing & Plan Information

100% Free.

Specifications

Supported Formats
JSON-LDMICRODATARDFAHTML
Available Platforms
Web
Developer / Team: Schema.org

Associated Tasks

Schema Markup & Rich Snippet ValidatorJSON Formatter & ValidatorMeta Tags & Open Graph Generator

Ready to use Schema.org Markup Validator?

Launch the official Schema.org Markup Validator web app in a new tab to complete your document or image task.

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