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BrainScan Media

Schema Checker

Check your page’s structured data—and find JSON-LD errors worth fixing.

Free structured data check

Check your Schema.org markup.

Structured data describes your business, services, products, articles, and other page content in a format search engines can understand. Enter a page URL to inspect its embedded JSON-LD.

Find invalid JSON, unknown Schema.org types and properties, and properties that may not fit the declared type. Review the collected source separately from the findings, with each issue pointing to its JSON-LD block.

This checks the fetched HTML. It does not run JavaScript or verify Google rich-result eligibility, required Google fields, or every JSON-LD rule. Microdata, RDFa, and unsupported contexts are flagged for further review.

Enter a domain or an HTTP/HTTPS page URL. We preserve its path and try HTTP if HTTPS cannot be reached. Up to 30 embedded JSON-LD blocks, 128 KB of markup, and 5,000 source lines.

Recently updated your website?

Results are cached for up to one hour to reduce repeated requests and help protect our tools from abuse. If you update your website or files after a check, you may still see the previous results. Please allow up to one hour, then run the check again.

Check Your Website’s SEOFor titles, indexing, and other homepage signals, use our SEO Checkup.

A practical review of your structured data

JSON-LD syntax

Find broken JSON, invalid type declarations, and malformed graph containers before they interfere with data processing.

Schema.org vocabulary

Check type and property names against a local official vocabulary snapshot, including inherited property associations.

Clear findings

Separate the collected markup from errors and suggestions. Inspect detected entities, then print or save your report.

SEO & AI Searchability Services

Turn your checkup into a plan for better discovery.

BrainScanMedia offers technical SEO and AI searchability services, including structured data, crawlability improvements, content organization, and clear page identity and accurate Schema.org markup. Let us help make your website easier for search engines and AI systems to understand.

Explore SEO & AI Searchability