Google results
A single missing comma can make structured data invisible to Google. Here's how to test schema markup, read the errors, and fix the problems that come up most.
Structured data (schema markup) only helps if search engines can read it. Testing catches two kinds of problems: syntax errors, where the code itself is broken, and content errors, where the code is valid but missing fields Google needs.
Enter a page in the checker on this page. It finds every JSON-LD block, microdata item and schema type on the page, flags broken JSON, and checks the required and recommended fields for the types Google uses.
Free tool
Paste a page address. See every schema.org item on it, what's wrong, and the exact line where broken JSON-LD fails.
| Tool | What it checks | Use it when |
|---|---|---|
| A schema checker like this one | Syntax, types found, required fields | Quick checks on any page |
| Google Rich Results Test | Eligibility for Google's rich results | Before and after publishing |
| Schema Markup Validator (validator.schema.org) | Full schema.org vocabulary, all types | Types Google doesn't use for rich results |
Google's Rich Results Test only reports on types that produce rich results. If you use other schema types, the schema.org validator covers them.
A trailing comma, a missing quote or a curly quote pasted from a word processor breaks the whole block:
{
"@context": "https://schema.org",
"@type": "Product",
"name": "Trail Shoe",
}That final comma after "Trail Shoe" makes the JSON invalid. Remove it.
A Product needs a name and at least one of offers, review or aggregateRating. An Event needs a name, start date and location. Each type's requirements are listed in Google's structured data documentation.
2026-11-04 or 2026-11-04T19:00:00-05:00."price": "49.99" with "priceCurrency": "USD".https://schema.org/InStock.Ratings, prices or FAQs in the code that visitors can't see on the page break Google's guidelines and can lead to a manual action.
A theme and an SEO plugin each adding their own Product or Organization block, with different values. Keep one.
If you need to build markup from scratch, the schema markup generator produces valid JSON-LD you can paste straight in.
Run the page through a schema checker or Google's Rich Results Test. For schema types Google doesn't use, use the Schema Markup Validator at validator.schema.org.
The Rich Results Test checks eligibility for Google's rich results only. The Schema Markup Validator checks any schema.org type against the full vocabulary.
Warnings don't stop a rich result, but adding the recommended fields gives Google more information to display.
Valid markup makes a page eligible, not guaranteed. Google decides per search, and some types like FAQ and HowTo are restricted or retired.
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