Official Schema.org structured data and schema markup checker.
Maintained by the Schema.org community, this authoritative schema markup checker and structured data validator inspects web pages for semantic markup errors. It tests for syntax errors, missing mandatory properties, invalid type nestings, and schema conformance for entities like Organizations, Products, Articles, FAQs, Breadcrumbs, and WebSites.
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.
Everything needed to validate and audit structured data before pushing to production:
Scans for missing required attributes, unrecognized Schema.org types, improper JSON formatting, and invalid date or URI formats.
Allows on-the-fly corrections to your JSON-LD code block and provides instant re-validation without refreshing the page.
Accepts modern JSON-LD script tags, legacy Microdata attributes, and RDFa semantic annotations interchangeably.
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".
The Schema.org Markup Validator checks conformance to the complete, generic Schema.org vocabulary. Google Rich Results Test specifically checks whether your structured data qualifies for Google-specific search enhancements (like star ratings, FAQs, or recipe cards).
100% Free.
Launch the official Schema.org Markup Validator web app in a new tab to complete your vector optimization task.
Launch Schema.org Markup ValidatorCompare other verified online tools that perform similar tasks.
The online diff tool to compare text, images, PDFs, and spreadsheets.
Diffchecker compares text, source code, images, PDFs, and Excel files, highlighting character-level and line-level differences side by side.
Real-time word, character, sentence, and reading time counter.
WordCounter is a clean text statistics tool that calculates word counts, character lengths, reading time, keyword density, and Flesch reading ease.
Seamless visualization of JSON, YAML, XML, and CSV data into interactive graphs.
JSON Crack transforms complex JSON, YAML, and CSV structures into interactive node graphs, making nested API payloads immediately understandable.