Structured Data Tester
Test and validate schema markup (JSON‑LD, Microdata, RDFa) on any web page. Paste your HTML or enter a URL, and instantly see extracted structured data, warnings, and errors.
What is a Structured Data Tester?
A Structured Data Tester validates the schema markup (JSON‑LD, Microdata, RDFa) embedded in your web pages. It extracts the structured data items, checks them for common errors, and displays the properties in a readable format. This helps you ensure your pages are eligible for rich results in Google Search and other search engines.
How to Test Structured Data
- Paste your HTML code in the text area or enter a URL to test a live page.
- Click "Test Structured Data" or "Fetch & Test".
- The tool extracts all JSON‑LD scripts, Microdata items, and RDFa annotations.
- Review the extracted items and any warnings/errors below.
- Download the extracted data as a JSON file if needed.
Why Use This Free Structured Data Tester?
- 100% free: No sign‑up, no limits, no watermarks.
- Private & offline: All parsing happens in your browser. URL fetching uses a public CORS proxy – only the page HTML is retrieved.
- Supports all major syntaxes: JSON‑LD, Microdata, and RDFa.
- Detailed reports: See item types, property values, and validation errors.
- Exportable: Download all extracted structured data as a JSON file for further analysis.
- Mobile friendly: Works on smartphones and tablets.
Frequently Asked Questions
It parses the HTML you provide (or fetches a URL) and extracts JSON‑LD scripts, Microdata, and RDFa annotations. It then displays the extracted items and validates them against basic Schema.org rules.
Yes, completely free. No sign‑up, no page limits. Test as many pages as you want.
Yes, enter a URL and the tool will attempt to fetch the page HTML via a CORS proxy. If the fetch fails, paste the page source directly.
It detects JSON‑LD (application/ld+json), HTML Microdata (itemscope), and RDFa (typeof). It extracts the types and properties for all of them.
It performs basic validation (required properties, correct types). For a full Google Rich Results check, use Google's official tool. This tool gives you a fast first pass.
No. All parsing happens directly in your browser. When fetching a URL, the request goes through a public CORS proxy – only the page HTML is retrieved.
Yes, the tool is fully responsive and works on smartphones and tablets.
This Nyxbo Structured Data Tester is one of the best – it's free, private, and gives you instant schema extraction without any sign‑up.
You can download all extracted items as a .json file for offline analysis or documentation.