CodeQuest.workSEO

Free Structured Data Checker Tool

Is your site's structured data implemented correctly?Errors prevent Google from understanding your content accurately.

Learn the differences between structured data, JSON-LD & schema in detail

Just enter a URL — 3 free checks without registration

What is Structured Data (Schema.org / JSON-LD)?

A machine-readable format that tells search engines what a page is about, and the key requirement for Google rich results and AI-search citation.

Recommended format
JSON-LD (Google's official recommendation)
Main types
Organization, WebSite, BreadcrumbList, FAQPage, Product, Article
Benefits
Rich result eligibility, higher AI-search citation rate
Coverage
10+ Schema.org types

Best for: E-commerce, media and corporate site owners targeting rich results and AI citations

What Is Structured Data?

Structured data is markup that describes page content in a machine-readable format for search engines.

FAQ Schema

Mark up FAQs to display accordion-style answers in search results. Increases visible area and improves CTR.

Breadcrumb

Display site hierarchy in search results. Helps users understand site structure and improves click-through rates.

Product / Service

Product/Offer schema shows price, availability, and review stars in search results. Essential for e-commerce and SaaS.

HowTo & Article

Mark up step-by-step guides for step display in search results. Article schema adds author information to content.

Why Structured Data Boosts SEO

Google uses structured data to display rich results (FAQs, review stars, breadcrumbs, etc.) in search. Studies show rich results improve CTR by an average of 20-30%.

Our tool allocates 40 out of 40 points to structured data diagnosis, thoroughly checking JSON-LD implementation. This is because structured data is one of the highest-ROI SEO tactics available.

With the rise of AI search (ChatGPT, Perplexity, Gemini, etc.), structured data has become even more important. AI search engines use JSON-LD schemas like Organization, FAQPage, and Product to assess source reliability — proper implementation increases your chances of being cited in AI search results. Our tool goes beyond validation: it auto-generates the improvement code you need, so you can fix issues in minutes instead of hours.

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40-point diagnosis

Check your site's structured data now

Automatically diagnose JSON-LD and Schema.org implementation. See your rich results readiness.

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FAQ

What is a structured data check?▾
It's a tool that automatically diagnoses JSON-LD and Schema.org implementation. Check your readiness for rich results in search.
Does missing structured data affect SEO?▾
Structured data isn't a direct ranking factor, but it helps Google understand page content and is used as an information source by AI search (ChatGPT, Perplexity, etc.). In practice, sites with structured data tend to get indexed faster by Google. While FAQ rich results were restricted in 2023, Google still uses structured data internally, and other schema types (Product, HowTo, etc.) continue to show rich results. Our tool allocates 40% of the SEO score to structured data.
Which structured data types can you check?▾
We check FAQ schema, breadcrumbs, Product/Offer, HowTo, Article, Organization, WebSite, and other major schema types.
How is this different from Google's Rich Results Test?▾
Google's tool focuses on detecting syntax errors. Our tool evaluates structured data within the overall SEO score and auto-generates improvement code for missing schemas.
How does FAQPage schema appear in search results?▾
FAQ accordions may appear in search results, increasing page visibility and improving CTR.
How do structured data errors affect SEO?▾
Syntax errors prevent Google from recognizing your markup, so rich results won't appear. Our tool detects errors and generates fix code.
What is the difference between JSON-LD and Microdata?▾
JSON-LD is written inside a <script> tag as JSON, so you can add it without modifying existing HTML. Microdata embeds attributes directly into HTML elements, making maintenance harder. Google officially recommends JSON-LD, and our tool auto-generates improvement code in JSON-LD format.
How do I validate my structured data?▾
Just enter your URL in our tool to automatically check JSON-LD syntax and detect missing schemas. For a complete picture, combine our tool with Google's Rich Results Test to verify both syntax errors and SEO impact.
Can I use this structured data checker on WordPress sites?▾
Yes. Just enter a URL — it works with any CMS or static site. Copy the generated improvement code into your theme files or configure it through a plugin.
Is structured data effective for AI search engines like ChatGPT and Perplexity?▾
Yes. AI search engines use structured data to assess source reliability. Properly implemented Organization, WebSite, and FAQPage schemas increase the likelihood of being cited in AI search results.

Which Structured Data Works for Each Page Type

Structured data (JSON-LD) is a supplementary signal that helps Google understand content — it aids rich result acquisition and AI Overview comprehension. Implementing the right schema for each page type is key.

Page Type × Recommended Schema

Page typeRecommended schema
Articles & BlogsArticle, BreadcrumbList
FAQ PagesFAQPage
Product PagesProduct, Offer, AggregateRating
Local BusinessesLocalBusiness
Site-wideOrganization, WebSite
Authors & OperatorsPerson, Organization

Common JSON-LD Syntax Errors

  • •Missing required properties
  • •Missing commas or unclosed curly braces
  • •Misspelled @type values
  • •Using properties that do not exist in schema.org

3 Ways to Use Structured Data

1.Rich result acquisition (FAQ, breadcrumbs, etc.)

Correctly implementing schemas like FAQPage, BreadcrumbList, and Product increases the chance of rich results appearing in search — widening your footprint and potentially improving click-through rates.

2.Helping AI Overview understand your content accurately

Structured data acts as a supplementary signal for Google AI Overview to understand page type, authorship, and Q&A. FAQPage and Article schemas in particular help AI organize context when citing answers.

3.Declaring E-E-A-T signals with Person/Organization schema

Person and Organization schemas provide explicit signals for Google to evaluate expertise, experience, authority, and trust (E-E-A-T). Keeping your author page content and JSON-LD in sync is essential.

An honest note: Implementing structured data does not guarantee rich results or AI Overview citations. Google ignores markup that violates its guidelines — such as content that differs from what is actually displayed on the page.