// inspect structured data blocks
Instantly detect and inspect JSON-LD structured data blocks on any page. Summarize schema types, key properties, and validate structure — free and browser-based.
Paste the full HTML of any webpage to extract all JSON-LD blocks.
No structured data yet
Paste HTML or JSON-LD and click InspectCopy the full HTML of a webpage (Ctrl+U in browser) or just paste your JSON-LD script blocks.
The tool scans for all application/ld+json script tags and extracts their content.
Each block is displayed with its schema type, key properties, and a copy button for the raw JSON.
Structured Data Tester Lite extracts and summarizes all JSON-LD blocks found in any HTML document. It shows you the schema @type, key properties, and nesting structure — helping you verify your schema markup without needing Google's Search Console.
All processing happens client-side. Your HTML is never uploaded to any server.
JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding structured data in a <script> tag. Search engines like Google use it to understand page content and generate rich results in search listings, such as star ratings, event dates, and product prices.
This tool performs a lightweight structural inspection — it detects all JSON-LD blocks, parses them, and surfaces key properties. For full Google-specific validation including rich result eligibility, use Google's Rich Results Test alongside this tool.
Yes — open the page in your browser, press Ctrl+U (or Cmd+U on Mac) to view the source, select all, and paste it into the input. This gives you the exact HTML the browser received, including all JSON-LD blocks.
This tool detects any valid schema.org type — Article, Product, FAQ, Organization, BreadcrumbList, Event, Recipe, Review, Person, LocalBusiness, and hundreds more. It reads the @type field and surfaces it regardless of the specific vocabulary used.
No. All parsing and extraction happens entirely in your browser using JavaScript. Your HTML source is never transmitted to any external server, making this safe to use with sensitive or private page content.
Absolutely. Simply paste the full HTML of your page and the tool will detect and display every JSON-LD block found, including nested or graph-based structures. Each block gets its own card with a type badge and property breakdown.
A structured data tester is a tool that helps developers, SEO professionals, and content publishers verify that their schema markup is correctly implemented. Structured data — most commonly implemented as JSON-LD — tells search engines like Google, Bing, and others what your page content actually means, not just what it says. When implemented correctly, structured data can unlock rich results in search listings: star ratings for reviews, price ranges for products, event schedules, FAQ dropdowns, and more.
The Structured Data Tester Lite scans any HTML document for application/ld+json script tags, extracts all JSON-LD blocks, and presents them in a readable, organized format. You see the schema @type (the vocabulary term used), all top-level properties, and nested data structures — instantly, with no server upload required.
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Google recommends JSON-LD over Microdata and RDFa because it's easy to implement, doesn't require modifying existing HTML markup, and can be placed anywhere in the document (typically in the <head>). A JSON-LD block looks like this:
{
"@context": "https://schema.org",
"@type": "Article",
"headline": "My Page Title",
"author": {
"@type": "Person",
"name": "Jane Doe"
}
}This tells search engines that the page is an article, who authored it, and what the headline is — all in a clean, separate script block that doesn't affect the visible HTML at all.
Not all structured data types generate visible rich results in search — but many do. Here are the most impactful schema types and what they can unlock:
There are several ways to get the HTML you need for testing. The simplest approach is to right-click any webpage and choose "View Page Source" (or press Ctrl+U). This opens the raw HTML as served to the browser. Select all (Ctrl+A), copy, and paste it into the input above.
Alternatively, if you already know what your JSON-LD looks like, you can switch to "Raw JSON-LD" mode and paste just the JSON object directly. This is useful during development before the page is live.
Testing structured data well means using multiple tools at different stages. Start with this tester to quickly verify that your JSON-LD is syntactically valid and that all expected properties are present. Then use Google's Rich Results Test to confirm eligibility for rich search features. Finally, check Google Search Console's Enhancement reports after your pages have been indexed to see how Google actually processed your markup in production.
Common problems this tool helps you catch early include: missing required properties (like name on a Product), malformed JSON that causes parse errors, missing @context declarations, and accidentally nested or duplicated blocks that could confuse search engine parsers.
For best results with schema markup, keep these principles in mind. Only mark up content that is actually visible on the page — Google's guidelines explicitly prohibit marking up content that users cannot see. Use the most specific schema type that accurately describes your content. For example, prefer BlogPosting over the generic Article when appropriate. Always include the required properties for each type, as missing required fields typically prevent rich results from appearing. Test after every significant change to your templates, and monitor Search Console for structured data errors on an ongoing basis.
When implementing JSON-LD on large sites, placing the script in the <head> ensures it is discovered early in the parse process. Avoid dynamically injecting JSON-LD via JavaScript only — while Google can generally process client-rendered content, server-side or static JSON-LD is more reliable.