Free schema markup checker

What it checks

• Whether every JSON-LD block parses as valid JSON, and what microdata the page carries.
• Required and recommended properties for Article and BlogPosting, Product, Offer, AggregateRating, Review, Organization, LocalBusiness, WebSite, ProfilePage, Person, BreadcrumbList, FAQPage, QAPage, DiscussionForumPosting, Event, Recipe, VideoObject, JobPosting, SoftwareApplication, Course, Dataset and HowTo, plus their common subtypes.
• Which Google rich result each item can earn, and which ones Google has limited or retired.
• Dates in ISO 8601, and dateModified that isn't earlier than datePublished.
• Relative URLs in url, image, logo and sameAs, which should be full https:// addresses.
• Misspelled or wrongly capitalised types, like Organisation or organization.
• Headlines and FAQ questions that don't appear on the page itself.
• Organization items that name different things, and @id links that point to nothing.
• Articles credited to an Organization instead of a named Person.

How to use it

• Enter a page address, or switch to Paste code to check JSON-LD before it goes live.
• Fix the errors first: they stop search engines using the item.
• Work through the suggestions: they're recommended properties that make an item more useful.
• Check the rich result line on each item to see whether it's eligible.
• Open Show properties to see exactly what each item says, or copy the JSON-LD to edit it.

What schema markup is

Schema markup is structured data written with the schema.org vocabulary. It tells search engines and AI systems exactly what a page is about: an article by a named author, published on a given date; a product with a price and stock level; a business with an address and opening hours. Without it, they have to infer those facts from the text.

JSON-LD, microdata and RDFa

Which rich results Google still shows

Eligible doesn't mean guaranteed. Google decides whether to show a rich result based on the query, the page and its own quality checks.

Which schema to add first

For blog posts in detail, see the schema every blog post should ship.

Common schema errors and how to fix them

Adding schema on WordPress, Shopify, Webflow and custom sites

• WordPress: SEO plugins such as Yoast and Rank Math output Organization, WebSite, Article and BreadcrumbList for you. Check a post here for duplicates if your theme adds its own.
• Shopify: most themes output Product markup. Review apps usually add the rating; check a product page to confirm the offer and rating both come through.
• Webflow: paste JSON-LD into the page's custom code, and use CMS fields in collection templates so each item gets its own values.
• Custom sites and frameworks like Next.js: render a script tag of type application/ld+json on the server, built from the same data as the page.

Why structured data matters for AI search

Schema doesn't make a page rank on its own. It makes the page unambiguous: who published it, who wrote it, when it last changed, and what kind of thing it describes. That clarity is what rich results depend on, and it gives AI systems facts they don't have to guess, which is part of what makes a page citable by AI.

This checker, Google's Rich Results Test and the Schema Markup Validator

After you fix it

Changes take effect when search engines next crawl the page. To speed that up, request indexing with the URL Inspection tool in Google Search Console, and use its rich result reports to find the same problem across the rest of your site.