What is Structured Data Validator?
Structured Data Validator is a free, browser-based tool that validates JSON-LD structured data against schema.org specifications and previews how your content may appear as rich snippets in Google search results. It supports 10 common schema types including Article, Product, FAQPage, Recipe, Event, LocalBusiness, Organization, Person, BreadcrumbList, and HowTo. Paste raw JSON-LD or full HTML — the tool auto-detects embedded script tags, checks for required and recommended properties, validates value types, and renders a simulated search result preview. All processing runs entirely in your browser.
Common Use Cases
SEO Audit
Validate structured data on your pages to ensure all required properties are present and correctly formatted before submitting to search engines.
Rich Snippet Debugging
Preview how your JSON-LD will render as a rich snippet in search results to catch display issues before they go live.
Schema Development
Test and iterate on JSON-LD markup during development without leaving your browser or waiting for Google to re-crawl.
Content Migration
Verify structured data integrity when migrating content between CMS platforms or redesigning page templates.
How to Use This Tool
- Paste your JSON-LD markup or full HTML page source into the input textarea (or click Load Sample for an example)
- Click the Validate button to run all checks against schema.org rules
- Review the summary bar showing error, warning, and info counts
- Examine each validation message with its property path and severity level
- Check the Rich Snippet Preview to see how your data would appear in Google search results
Related Tools
Learn More
- Schema.org Official schema.org vocabulary reference
- Google Rich Results Test Google official structured data testing tool
- Google Structured Data Docs Google guide to structured data for search