MetoolzyJSON-LD Checker
16 Schema Types
Article, Product, FAQPage, Recipe, Event and more.
URL Extraction
Fetch and validate JSON-LD from any webpage.
Error Report
Detailed errors, warnings, and field info.
Client-side
All processing in your browser. No data uploaded.
เกี่ยวกับ JSON-LD Checker
The JSON-LD Structured Data Validator checks your Schema.org markup for errors, missing required properties, and best-practice recommendations. JSON-LD (JavaScript Object Notation for Linked Data) is Google's preferred format for structured data — embedding it in your pages enables rich results like star ratings, recipe cards, FAQ accordions, event listings, job postings, and breadcrumbs directly in search results. These rich snippets dramatically increase visibility and click-through rates. This tool supports 16 Schema.org types including Article, Product, FAQPage, Recipe, Event, LocalBusiness, HowTo, and more. You can paste JSON-LD directly or fetch it automatically from any URL. Validation runs entirely in your browser with no data uploaded to any server.
วิธีใช้ JSON-LD Checker
- Paste your JSON-LD code into the editor, or switch to the "Fetch from URL" tab to extract it from a live page.
- Click "Load Sample" to see a correctly formatted Article example as a starting point.
- Review the validation results panel — a green "Valid" badge means no errors; red "Invalid" means issues need fixing.
- Fix any errors listed in red (missing @context, missing required fields) and warnings listed in orange (missing recommended fields).
- Once valid, copy the JSON-LD and add it inside a <script type="application/ld+json"> tag in your HTML <head>.
- Test your live page in Google's Rich Results Test tool to confirm eligibility for rich snippets in search results.
คำถามที่พบบ่อย
What is the difference between JSON-LD, Microdata, and RDFa?
All three are formats for embedding structured data in web pages. JSON-LD is a standalone script block in the <head> — it is the easiest to add and maintain and is Google's recommended format. Microdata and RDFa are embedded inline within HTML elements, making them harder to manage and more prone to breaking during HTML changes.
Which schema types are most valuable for SEO?
The types with the highest impact on search appearance are: Article (news ticker, top stories), Product (price, availability, ratings), FAQPage (FAQ accordion in results), Recipe (cooking cards), Event (event rich results), LocalBusiness (knowledge panel), and BreadcrumbList (breadcrumb trail under result URLs).
Does invalid JSON-LD hurt my SEO?
Invalid JSON-LD will not negatively affect your existing rankings, but it will prevent Google from understanding and displaying rich results. Errors like missing required properties or invalid JSON syntax cause Google to silently ignore the markup.
How do I add JSON-LD to a Next.js or React application?
In Next.js, add a <script type="application/ld+json"> tag inside the <Head> component of your page or use the newer metadata API. For React SPAs, inject it via a Helmet component or add it directly to your index.html. The JSON-LD only needs to be present when the page first loads.
Can I have multiple JSON-LD blocks on the same page?
Yes. Google supports multiple <script type="application/ld+json"> blocks on a single page. This is useful for pages that represent multiple schema types — for example, an Article page might also have BreadcrumbList and Organization markup in separate script blocks.
เครื่องมือที่เกี่ยวข้อง
Top 10 Free Tools Every Developer Needs
Boost your productivity instantly. Get our exclusive cheatsheet featuring the most essential web utilities you didn't know you needed, delivered straight to your inbox.
We respect your inbox. Unsubscribe at any time.
The Ultimate JSON-LD Checker
JSON-LD Checker is a powerful, free online tool designed to simplify your digital workflow. ตรวจสอบข้อมูล JSON-LD สำหรับ SEO ตรวจสอบ schema.org
In today's fast-paced digital world, efficiency is key. Whether you're a developer, designer, or digital marketer, finding reliable utilities is crucial. With our JSON-LD Checker, you can get things done instantly right in your browser, with absolutely no signup required.
Why Use Our JSON-LD Checker?
Our tool is built with performance and privacy in mind. All processing is incredibly fast, ensuring you don't waste any time.
- 100% Free: No hidden fees or premium paywalls.
- No Installation: Works instantly in any modern web browser.
- Privacy First: We respect your data. Most processing happens directly on your device.
- User-Friendly: A clean, intuitive interface that anyone can use without technical skills.
Try it out today and experience the easiest way to handle your tasks!
Ultimate Technical SEO Checklist
Stop guessing what Google wants. Download our step-by-step checklist to perfectly optimize your new website and start ranking faster.
We respect your inbox. Unsubscribe at any time.