🧩 Schema Markup Validator

Structured data (Schema.org markup, usually written as JSON-LD) is how you tell search engines what a page actually represents — an article, a product, a FAQ, a local business — in a machine-readable way. Done right, it can unlock rich results in Google: star ratings, FAQ dropdowns, breadcrumbs, and more. Done wrong (missing required fields, invalid syntax), it either does nothing or triggers errors in Search Console. This tool finds every JSON-LD block on a page, lists the schema types used, and flags missing recommended fields.

How to Use This Tool

Enter a page URL and click Validate Schema. The tool extracts all <script type="application/ld+json"> blocks and parses them.

What This Tool Checks

How many JSON-LD structured-data blocks exist on the page, whether each is valid parseable JSON, what @type each declares (Article, Product, FAQPage, Organization, etc.), and whether common required/recommended fields for that type are present.

Understanding Your Results

An "invalid JSON" flag means the block has a syntax error and search engines will ignore it entirely. A "missing fields" warning means the schema will likely still be read, but may not qualify for the corresponding rich result until you add the missing properties. This tool checks structure, not Google's full eligibility rules — always confirm with Google's own Rich Results Test before relying on a rich result appearing.

How to Fix Common Problems

Add the flagged missing fields to your JSON-LD. If you're on WordPress, most schema is generated by your SEO plugin or theme — a missing field usually means a piece of post data (like an author or a featured image) isn't filled in, rather than a code problem. For hand-written schema, validate the JSON syntax carefully; a single misplaced comma breaks the whole block.

SEO Best Practices

Only mark up content that's actually visible on the page — marking up information a user can't see violates Google's structured-data guidelines and can earn a manual penalty. Don't add Review or AggregateRating schema with invented ratings; fake review markup is a common cause of structured-data penalties.

Example

An FAQ page with FAQPage schema that's missing the "mainEntity" field won't produce the expandable FAQ rich result in Google — adding properly structured question/answer pairs fixes it.

Common Mistakes to Avoid

Don't stuff a page with schema types that don't match its actual content. Don't rely on this tool alone for rich-result eligibility — it validates structure, while Google's Rich Results Test checks their specific display requirements. Never fabricate ratings, prices, or review counts in schema.