Free tool

Schema markup validator

Paste JSON-LD structured data and instantly check it for syntax errors and required fields. Catches missing @context, @type, and type-specific properties.

100% free
No sign-up
No limits
Instant results

Paste JSON-LD

Valid

@type · Product

errors + warnings

No issues

What this tool does

JSON-LD syntax validation
Required field checks per @type
Product / Article / FAQ / Organization rules
Strips <script> wrapper automatically

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What is Schema Markup Validator?

A schema markup validator is an essential tool for checking whether your JSON-LD structured data is correctly formatted and contains the required properties for Google rich results. Schema markup (structured data) is code you add to your pages to help search engines understand your content -- it powers rich snippets like star ratings, FAQ dropdowns, product prices, recipe cards, and breadcrumbs in Google search results. Invalid or incomplete schema markup is silently ignored by search engines, meaning you miss out on rich results that dramatically increase click-through rates. This validator parses your JSON-LD, checks for valid JSON syntax, verifies the @context points to schema.org, confirms the @type is present, and runs type-specific validation rules for Product, Article, BlogPosting, NewsArticle, Organization, FAQPage, and BreadcrumbList schemas. It also automatically strips <script> wrappers so you can paste code directly from your page source.

How to use Schema Markup Validator

1
Paste your JSON-LD structured data
Copy the JSON-LD code from your page source (with or without the <script type="application/ld+json"> wrapper) and paste it into the editor. A sample Product schema is pre-loaded so you can see how it works.
2
Review errors and warnings
The validator instantly checks for JSON syntax errors, missing @context and @type properties, and type-specific required fields. Errors prevent rich results; warnings indicate recommended properties that improve eligibility.
3
Fix issues and re-validate
Edit your JSON-LD directly in the editor and see results update in real time. Once all errors are resolved and the status shows Valid, your schema is ready to deploy on your site.

Features

JSON syntax validation with clear error messages pointing to the exact parsing issue
Checks @context is set to schema.org and @type is present on every schema object
Type-specific rules for Product, Article, BlogPosting, NewsArticle, FAQ, Organization, and BreadcrumbList
Warns about missing recommended fields like author, datePublished, offers, and aggregateRating
Automatically strips <script type="application/ld+json"> wrappers for easy copy-paste from page source
Supports arrays of schema objects for pages with multiple structured data blocks

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Frequently asked questions

What is JSON-LD and why is it the preferred schema format?

JSON-LD (JavaScript Object Notation for Linked Data) is a script-based format for embedding structured data in web pages. Google recommends JSON-LD over Microdata and RDFa because it is easier to implement, does not require modifying your HTML markup, and can be injected dynamically with JavaScript.

What are the most important schema types for SEO?

The highest-impact schema types are Product (star ratings and prices), FAQPage (expandable FAQ snippets), Article/BlogPosting (news carousels), Organization (knowledge panel), LocalBusiness (local pack), BreadcrumbList (breadcrumb trails), and HowTo (step-by-step snippets). Each triggers different rich result formats in Google.

Will fixing schema errors guarantee rich results in Google?

No. Valid schema is necessary but not sufficient. Google decides whether to show rich results based on page quality, content relevance, and user behavior. However, invalid schema guarantees you will NOT get rich results, so validation is a critical first step.

Can I have multiple JSON-LD blocks on the same page?

Yes. You can include multiple <script type="application/ld+json"> blocks on a single page, each containing different schema types. For example, a product page might have Product schema, BreadcrumbList schema, and Organization schema all on the same page.

What is the difference between an error and a warning in this validator?

Errors indicate structural problems that will prevent Google from parsing your schema at all -- like invalid JSON syntax or missing @type. Warnings indicate missing recommended properties that reduce your chances of earning rich results but do not break the schema entirely.

Does this validator check everything Google checks?

This tool validates JSON syntax, schema.org structure, and type-specific required fields. For full Google Rich Results eligibility testing (which also checks page context and rendering), use this tool for quick iteration, then do a final check with Google Rich Results Test before going live.

What is Schema Markup Validator?

How to use Schema Markup Validator

Paste your JSON-LD structured data

Copy the JSON-LD code from your page source (with or without the <script type="application/ld+json"> wrapper) and paste it into the editor. A sample Product schema is pre-loaded so you can see how it works.

Review errors and warnings

The validator instantly checks for JSON syntax errors, missing @context and @type properties, and type-specific required fields. Errors prevent rich results; warnings indicate recommended properties that improve eligibility.

Fix issues and re-validate

Edit your JSON-LD directly in the editor and see results update in real time. Once all errors are resolved and the status shows Valid, your schema is ready to deploy on your site.

Features

JSON syntax validation with clear error messages pointing to the exact parsing issue

Checks @context is set to schema.org and @type is present on every schema object

Type-specific rules for Product, Article, BlogPosting, NewsArticle, FAQ, Organization, and BreadcrumbList

Warns about missing recommended fields like author, datePublished, offers, and aggregateRating

Automatically strips <script type="application/ld+json"> wrappers for easy copy-paste from page source

Supports arrays of schema objects for pages with multiple structured data blocks

Frequently asked questions

What is JSON-LD and why is it the preferred schema format?

What are the most important schema types for SEO?

Will fixing schema errors guarantee rich results in Google?

Can I have multiple JSON-LD blocks on the same page?

What is the difference between an error and a warning in this validator?

Does this validator check everything Google checks?