The Structured Data Linter is a fast and reliable tool that validates and debugs structured data on any webpage. Whether you’re using JSON‑LD, RDFa, or Microdata, this tool helps ensure your markup is accurate, SEO-friendly, and fully understood by search engines. Unlike other schema validators, it works with local contexts and provides human-readable feedback for all three major formats.
What the Structured Data Linter Does
This tool analyzes both raw structured data and live URLs. It checks for required and recommended fields using a curated set of type definitions across schema.org and other vocabularies like FOAF and vCard. It flags missing or unexpected fields and groups common issues into a frontend-friendly summary for easy review.
Key Features and Capabilities
- Supports JSON‑LD, RDFa, and Microdata
- Accepts raw input or full webpage URLs
- Parses structured data using the extruct and pyLD libraries
- Checks for missing types, fields, and required attributes
- Summarizes repeated issues with grouped results and examples
- Provides type-specific hints using a FIELD_SPECS guide
- Fully compliant with W3C and schema.org principles
Benefits for Site Owners and Developers
- Improves eligibility for Google rich results
- Finds hidden schema errors before publishing
- Faster and more versatile than many other schema tools
- Works offline with local context files for speed and privacy
- Helps non-developers understand and fix markup issues
Real-World Use Cases
- Bloggers testing VideoObject or Article schema
- Ecommerce owners fixing Product and Offer markup
- Agencies running audits on client site structured data
- SEO professionals validating FAQPage, Review, and BreadcrumbList types
Why This Tool Stands Out
- Multi-format support including raw input and URL fetch
- Grouped feedback for easier debugging and faster corrections
- No reliance on external schema fetches unless approved
- Helpful warnings designed to educate and inform
Try It for Free
Our Structured Data Linter tool is free and easy to use. Just paste your JSON-LD schema or test a live url to see more details. See exactly what’s missing, what needs improvement, and how to fix it with clear explanations. It’s not perfect but at the moment, there are no other tools like it on the internet.
Are you looking for a Video Schema Generator? We have one of those too! Check out: Free Video Schema Generator Structured Data For SEO➤JSON-LD
Conclusion
Whether you’re managing a personal blog or an enterprise platform, clean structured data is essential for visibility and indexing. The Structured Data Linter helps you catch issues early and optimize markup fast, giving your site the best chance to appear in search features and enhance user experience.
Structured Data Linter Tool FAQs
It supports JSON‑LD, RDFa, and Microdata across schema.org, w3.org, and related vocabularies.
Yes, the tool allows full-page testing through the /validate-url endpoint.
Yes. It helps novice and experienced web developers quickly locate issues.
