What is a schema.org validator?

A schema.org validator checks whether a website's structured data markup follows schema.org specifications correctly. It verifies JSON-LD, Microdata, and RDFa markup to ensure search engines like Google can read and use the data for rich results.

What is JSON-LD and why does it matter for SEO?

JSON-LD (JavaScript Object Notation for Linked Data) is Google's preferred format for structured data markup. It allows search engines to understand your content's context, enabling rich results like star ratings, FAQs, breadcrumbs, and product details in search results.

What schema types does SchemaScan validate?

SchemaScan validates 10 high-impact schema types: Organization, WebSite with SearchAction, BreadcrumbList, Article/BlogPosting, FAQPage, Product, AggregateRating/Review, Person/Author, HowTo, and JSON-LD syntax validity.

Is SchemaScan free to use?

Yes, SchemaScan is completely free to use with no account or login required. Simply paste any public URL to get an instant schema audit score and structured data report.

How do I fix schema.org errors on my website?

After scanning your URL, SchemaScan identifies missing or broken schema types and provides plain-English fix instructions for each issue. Enter your email address to receive a detailed fix-it report with specific recommendations for your site.

Free Schema.org Validator & Auditor

Validate & audit your website's
schema.org structured data

The free schema.org validator for SEOs and developers. Paste any URL to instantly audit JSON-LD markup, check rich results eligibility, and score your structured data coverage.

How it works

Paste any URL to validate

Homepage, product page, blog post — validate schema markup on any publicly accessible page.

Instant schema audit score

We fetch and validate JSON-LD, Microdata, and schema.org type coverage including rich results eligibility.

Get the structured data report

Enter your email for a full schema validator report — every issue explained with plain-English fix instructions.

What our schema validator checks

SchemaScan audits 10 high-impact schema.org types that influence Google rich results, Knowledge Panels, and search appearance.

Organization schema

Validates your brand identity markup for Knowledge Panels and logo display.

WebSite + SearchAction

Checks for Sitelinks Searchbox eligibility in branded search results.

BreadcrumbList

Validates breadcrumb trail markup for navigational rich results.

Article / BlogPosting

Audits news and blog content schema for Google Top Stories eligibility.

FAQPage schema

Checks for FAQ markup that generates expandable dropdowns in SERPs.

Product schema

Validates product markup including pricing, availability, and offers.

AggregateRating

Audits star rating schema that displays in Google Shopping and search.

Person / Author

Validates author markup supporting Google E-E-A-T signals.

HowTo schema

Checks step-by-step guide markup for rich result eligibility.

JSON-LD syntax

Validates all structured data blocks for syntax errors that prevent indexing.