Free tool

Schema Markup Validator

Paste your JSON-LD and see what is broken or missing. This checks syntax and the properties Google documents as required. Google's Rich Results Test and the Schema Markup Validator remain the authority.

JSON-LD, a script tag, or page HTML

Results

Paste your markup to see errors, warnings and passes here.

How to use the schema validator

Paste raw JSON-LD, a whole script tag, or the HTML source of a page. Every JSON-LD block in the paste is checked.
Fix each line marked Error first. These are invalid JSON, a missing @context or @type, or a property Google requires.
Read each line marked Warning and add the property if it applies to your page.
Confirm the result in Google's Rich Results Test before you publish.

What this validator checks

Any type is parsed and checked for @context and @type. These types also get property checks, based on Google's structured data documentation:

Product: name, and at least one of offers, review or aggregateRating. Nested ratings and reviews are checked too.
Article, BlogPosting, NewsArticle: Google lists no required properties, so a missing headline, image, datePublished or author is a warning.
FAQPage: mainEntity, with every Question carrying a name and an acceptedAnswer with text.
BreadcrumbList: itemListElement, with a position, name and item on each entry. The last entry may leave out item.
LocalBusiness: name and address. Restaurant and Store are checked the same way.
Event: name, startDate and location.
Recipe: name and image.
VideoObject: name, thumbnailUrl and uploadDate.
Review and AggregateRating: author and reviewRating on a review; ratingValue plus ratingCount or reviewCount on an aggregate rating.
Organization: no required properties, so a missing name, url or logo is a warning.

It does not check value formats such as dates and URLs, or whether a property belongs to a type. The Schema Markup Validator does that for the whole schema.org vocabulary. Need markup to start from? Build it with the schema markup generator, or see the other free SEO tools.

Frequently asked questions

What does this schema validator check?

Three things: that the JSON parses, that each item has a schema.org @context and an @type, and that the common rich result types carry the properties Google documents as required. It reads raw JSON-LD, a script tag, or page HTML with several JSON-LD blocks, including @graph arrays.

Is this the same as Google's Rich Results Test?

No. This is a quick first check. Google's Rich Results Test and the Schema Markup Validator at validator.schema.org remain the authority. Use them before you ship, because they check every property and value type and this tool does not.

What is the difference between an error and a warning?

An error is invalid JSON, a missing @context or @type, or a missing property that Google lists as required for that rich result. A warning is a property Google recommends, or one that is only required in some situations.

Does valid schema markup guarantee a rich result?

No. Google says structured data makes a page eligible for a rich result but does not guarantee one. The markup also has to match what visitors can see on the page and follow Google's structured data policies.

Can it check Microdata or RDFa, or fetch a URL?

No. It reads JSON-LD that you paste, which is the format Google recommends. It does not fetch pages. To test a live URL, use Google's Rich Results Test.

Does this tool store what I paste?

No. The checks run in your browser. Nothing you paste is sent to Seology.

Want schema checked across your whole site?

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