Schema Markup & JSON-LD Validator

Test your structured data before Google indexes it.

Fetch structured data from a live URL or paste raw JSON code to find missing commas, validate syntax, and explore your schema in a clean, interactive tree viewer.

Use the Tool​

What This Tool Does​

What the tool does​

This free tool automatically scrapes <script type="application/ld+json"> tags from any web URL, parses the raw strings, validates the JSON syntax, and presents the resulting Schema.org objects in an easy-to-read, collapsible tree structure.

What problems it solves​

Writing raw JSON-LD is incredibly prone to human error. A single missing quote or trailing comma will immediately invalidate the entire block, causing search engines to ignore your structured data. This tool catches those invisible syntax errors instantly.

Who should use it​

Technical SEO specialists, developers, and content managers who rely on structured data to gain competitive visibility in search results.

Why it matters​

Valid JSON-LD schema is required to obtain Google Rich Snippets (like product star ratings, recipe times, FAQ drop-downs, and event carousels). These rich results occupy significantly more visual space on the SERP, drastically improving organic Click-Through-Rates (CTR).

How It Works​

Input​

You can perform tests in two ways:

1. Fetch URL: Type in the address of a live page to scrape its existing Schema data.
2. Paste Code: Directly paste unformatted JSON-LD into the text area to test code before you deploy it to production.

Processing​

Our engine evaluates the data using strict JSON parsing standards. If the string fails validation, the tool catches the browser exception and pinpoints exactly what went wrong.

Limitations​

The URL-fetching feature requires the target page to be publicly accessible. It cannot scrape schema injected dynamically via client-side JavaScript routers (like Single Page React/Vue apps) unless they utilize Server Side Rendering (SSR) or have valid meta-tags present in the initial HTML payload.

Output​

Valid schema is formatted into interactive UI blocks grouped by their \@type (e.g., Article, Product, WebSite). Invalid code will output a distinct bright red warning highlighting the specific error message generated during the JSON parse step.

Frequently Asked Questions​

Why is my code failing validation?​

The most common cause for invalid JSON-LD is a "trailing comma" (a comma placed after the the very last item in an array or object). The JSON specification strictly forbids trailing commas. Another common error is using single quotes (') instead of double quotes (") around keys and string values.

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