Structured Data Tester & Validator
Validate JSON-LD schema markup on any URL. Check schema types, required fields, and AI citation readiness in seconds.
What is Structured Data?
Structured data is code you add to your webpage (usually as JSON-LD) that explicitly tells search engines and AI models what your content is about. It uses the Schema.org vocabulary to describe things like articles, products, businesses, events, and FAQs in a machine-readable format. When implemented correctly, structured data enables rich results in Google (star ratings, FAQ dropdowns, product prices) and helps AI chatbots cite your content accurately.
Schema Types for SEO
Article / BlogPosting
For blog posts and news articles. Enables headline, author, and date display in search results. Required: headline, author, datePublished.
Product
For e-commerce product pages. Enables price, availability, and review stars in search. Required: name. Recommended: offers, image, review.
FAQPage
For FAQ sections. Triggers expandable FAQ rich results in Google and is highly cited by AI chatbots. Required: mainEntity with Question/Answer pairs.
Organization / LocalBusiness
Establishes your entity identity. Essential for brand knowledge panels and AI entity recognition. Required: name, address (for LocalBusiness).
BreadcrumbList
Shows navigation breadcrumbs in search results. Improves click-through rate and site structure understanding. Required: itemListElement.
HowTo
For step-by-step tutorials and guides. Can trigger rich how-to results in Google. Required: name, step.
VideoObject
For video content. Enables video thumbnails and key moments in search results. Required: name, description, thumbnailUrl, uploadDate.
Event
For events and webinars. Shows date, location, and ticket info in search. Required: name, startDate, location.
Structured Data and AI Search
As AI-powered search engines like ChatGPT, Perplexity, and Google AI Overviews grow, structured data becomes even more critical. These systems use schema markup to:
- •Understand entities — Organization and Person schemas help AI identify who you are and establish authority
- •Extract factual claims — FAQPage and HowTo schemas provide structured answers that AI models prefer to cite
- •Verify product info — Product schema with pricing and reviews gives AI confidence in recommending your offerings
- •Build content graphs — BreadcrumbList and Article schemas help AI understand your site's topic hierarchy and expertise depth
Frequently Asked Questions
What is JSON-LD and why is it the preferred format?
JSON-LD (JavaScript Object Notation for Linked Data) is a structured data format embedded in a <script> tag. Google recommends JSON-LD over Microdata or RDFa because it separates data from HTML, is easier to maintain, and can be added without modifying your page template. Simply add a <script type="application/ld+json"> block to your page.
Does structured data directly improve rankings?
Structured data itself is not a direct ranking factor, but it indirectly improves SEO by enabling rich results (which increase click-through rates by 20-30%), helping search engines understand your content better, and improving your visibility in AI-generated answers. Sites with proper schema markup tend to outperform those without.
How does structured data help with AI search (GEO)?
AI models like ChatGPT, Claude, and Perplexity use structured data to understand your content's context, verify facts, and attribute sources. FAQPage schema is especially powerful because it provides pre-formatted question-answer pairs that AI can directly cite. Organization schema establishes your brand entity, making AI more likely to reference you as an authoritative source.
Which schema types should I add first?
Start with Organization (or LocalBusiness) schema on your homepage, Article/BlogPosting on blog posts, and FAQPage on any page with FAQ content. These three cover the most important use cases for both traditional SEO rich results and AI citation readiness. Then add Product schema for e-commerce pages and BreadcrumbList for site navigation.
Can I have multiple schemas on one page?
Yes, and you should. A typical blog post might have Article schema, Organization schema for the publisher, BreadcrumbList for navigation, and FAQPage if it contains an FAQ section. Each schema goes in its own <script type="application/ld+json"> block or they can be combined using @graph.