Schema Markup Validator
Free schema markup validator — fetch a page or paste JSON-LD to validate structured data syntax, list detected types, and catch parse errors.
About the Schema Markup Validator
Structured data (schema.org markup) helps search engines understand your content and unlocks rich results like star ratings, FAQs and breadcrumbs. This free schema markup validator fetches any page server-side or accepts pasted JSON-LD, then parses it to confirm the syntax is valid and lists every schema type it detects.
It extracts all JSON-LD script blocks from a page, parses each one, and reports syntax errors precisely — a trailing comma or unclosed brace that would stop search engines reading your markup entirely. Valid blocks are summarised by @type, so you can confirm your Article, Product, FAQPage or Organization data is present and well-formed.
Use it to catch broken structured data before it costs you rich results, or to inspect how a competitor marks up their pages. It focuses on JSON-LD, the format Google recommends, and gives you a clear pass or fail on parseability.
How to Use the Schema Markup Validator
- 1Enter a page URL to fetch, or paste your JSON-LD directly.
- 2Click Validate to parse the structured data.
- 3Review detected schema types and any syntax errors.
- 4Fix reported errors and re-validate until it parses cleanly.
Frequently Asked Questions
What is schema markup?
Schema markup is structured data — a standardised vocabulary from schema.org — added to your pages so search engines understand what the content represents: an article, product, recipe, event or business. It powers rich results, the enhanced listings with images, ratings and extra details in search.
What is JSON-LD and why is it preferred?
JSON-LD is a script-based format for structured data that sits in the page head or body without touching your visible HTML. Google recommends it because it is the easiest to add and maintain, keeps markup separate from content, and is simple to generate dynamically. This validator focuses on it.
What does this validator check?
It confirms your JSON-LD is syntactically valid — that it parses without errors — and lists the schema @types it contains. Syntax mistakes like trailing commas or unmatched brackets break structured data silently, so catching them is the first and most important validation step.
Will valid schema guarantee rich results?
No. Valid markup is required but not sufficient — Google decides when to show rich results based on content quality, guidelines compliance and relevance. Validate here to ensure your markup is error-free, then use Google's Rich Results Test to confirm eligibility for specific rich features.
Can I validate markup before publishing?
Yes. Paste your JSON-LD directly into the tool without a live URL and it validates the syntax immediately, so you can confirm your structured data parses cleanly before deploying it to your site.