Schema Markup (JSON-LD) Validator

Extract and validate Schema.org structured data from raw JSON-LD or HTML pages. Structural linting for Articles, Products, FAQs, and Organizations.

Private by architecture: All processing is 100% client-side memory. Your data never leaves this browser tab.

Notice: Structural Schema.org linting tool. Runs entirely in your browser. This tool validates against Schema.org specification rules and is not Google's live Rich Results crawler.

JSON-LD or HTML Containing <script type="application/ld+json">

0 lines • 0 chars JSON-LD

Validation Report & Detected Entities

Paste structured data and click Validate to generate the report.

No report generated

About This Tool

Schema Markup Validator is a client-side structural linter for Schema.org structured data. Paste raw JSON-LD or full HTML source code containing <script type="application/ld+json"> blocks to verify required properties and nesting.

Validates common types including Article, Product, FAQPage, Organization, Person, BreadcrumbList, WebApplication, LocalBusiness, and Event.

Key Features

HTML & JSON-LD Extraction: Extracts embedded <script type="application/ld+json"> snippets directly from full HTML pages or validates standalone JSON-LD.
Multi-Entity Graph Support: Parses @graph collections and nested child entities like ItemList and ListItem hierarchies.
Clear Severity Categorization: Distinguishes between specification-breaking errors and recommended property warnings.
Private & In-Memory: Your staging pages, unreleased product catalogs, and unpublished articles remain strictly in your browser.

Frequently Asked Questions

Is this the same as Google Rich Results Test?

No. This is a local structural Schema.org vocabulary linter. Google's proprietary crawler applies additional search-specific eligibility rules and Googlebot rendering which this local tool does not simulate.

Can I paste an entire web page HTML source?

Yes. The tool scans for all <script type="application/ld+json"> elements in the HTML and validates each JSON-LD block found.

Why does it warn about missing recommended properties?

While recommended properties (like dateModified or image) are not strictly required for valid JSON-LD, search engines recommend them to generate complete rich snippets.