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 CrispAudit validate?

CrispAudit 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 CrispAudit free to use?

Yes, CrispAudit 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, CrispAudit 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.

Trust

Review & AggregateRating Schema

Generate Review and AggregateRating JSON-LD to display star ratings in Google search results — one of the strongest CTR improvement tactics available.

Rich result type

Star ratings in SERP

Google documentation →

What valid Review JSON-LD looks like

A complete, validator-ready example — drop it in your <head>, swap the values for yours, and you're done.

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Blue Widget Pro",
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": "4.5",
    "reviewCount": 128,
    "bestRating": "5",
    "worstRating": "1"
  }
}
</script>

Want more than Review validation?

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Schema, cookies (GDPR/CCPA), accessibility, SEO — plus AI-generated fixes populated with your page's actual content. Free.

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Required fields

itemReviewed.name
reviewRating.ratingValue
author.name

Recommended fields

reviewBody
datePublished
publisher

Common Review schema errors

✗ratingValue outside 1–5 range
✗reviewCount is 0 or missing
✗Self-serving reviews without verified purchases
✗AggregateRating without individual Review entities

Generate Review schema

Fill in the fields below to generate valid JSON-LD you can paste directly into your page.

Item being reviewed*

Item type

Average rating (1–5)*

Number of reviews*

Best possible rating

Worst possible rating

Review schema — frequently asked questions

Can I add star ratings to my own products?

Yes, but Google's guidelines prohibit self-serving reviews. Ratings must reflect genuine customer opinions. First-party review schema is allowed if reviews are authentic.

What's the difference between Review and AggregateRating?

Review is for a single individual review. AggregateRating summarizes all reviews with an average score and count. Most product pages should include both.

Will star ratings always show in search results?

No — Google only shows review rich results for certain content types (products, recipes, books, movies). Blog posts and most service pages are not eligible.

Other schema types

E-commerceProductProduct snippets, Google Shopping ContentArticleTop Stories, Article rich results Rich ResultsFAQPageFAQ dropdowns in SERP BrandingOrganizationKnowledge Panel, logo in search Local SEOLocalBusinessLocal Knowledge Panel, Google Maps NavigationBreadcrumbListBreadcrumb trails in SERP

Audit your full schema coverage

CrispAudit checks all schema types at once — get a complete score and fix-it report for any URL.

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