# Schema Validator

> Agent-friendly Markdown of https://www.buildseo.org/free-tools/schema-validator — full index for AI agents: https://www.buildseo.org/llms.txt

Extract and validate a page's JSON-LD structured data.

## How it works

Enter a URL and the validator extracts every application/ld+json block on the page, parses each one, and reports JSON syntax errors — because a single stray comma silently disables an entire block for every crawler.

It inventories the declared @type values (walking @graph containers too) and runs required-field checks for the types that earn rich results: Article, Product, FAQPage, Organization, and BreadcrumbList.

Microdata (itemscope) markup is noted when present. Everything downloads as CSV or JSON, free and instant.

## Frequently asked questions

### Why did my structured data disappear from search results?
The most common cause is a JSON syntax error introduced by a template change — crawlers drop the whole block, not just the broken field. This validator surfaces the exact parse error per block.

### Which fields are actually required?
It depends on the type: Article needs a headline, Product a name, FAQPage a mainEntity of Questions with acceptedAnswers, BreadcrumbList positioned items. Missing required fields disqualify the rich result; missing recommended fields just weaken it — the validator distinguishes the two.

### Do you validate microdata too?
Microdata presence is reported so you know it exists, but validation runs on JSON-LD only — the format Google recommends and the one worth migrating to.

## Schema valid. Now feed it authority.

BuildSEO AI builds the verified backlinks that turn valid markup into rich results.

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