Structured Data Validator Pro — JSON-LD, Open Graph & Schema Markup Testing Tool

A structured data testing tool and schema markup validator that extracts and validates structured data from any URL — JSON-LD, Open Graph, Twitter Cards, microdata, RDFa, and meta tags — in one pass. Run a rich results check and schema.org validation across a whole sitemap, not one URL at a time. Local schema.org validation, Google rich-result eligibility check, and an AI-discovery readiness score. Pure HTTP, no browser.

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Structured Data Validator & Schema Markup Checker Features

• Extracts six structured-data formats per URL: JSON-LD, Open Graph, Twitter Cards, microdata, RDFa, and meta tags.
• Validates JSON-LD blocks against a bundled schema.org rule set with required-field gates per type (Article, Recipe, Product, Event, FAQPage, HowTo, VideoObject).
• Flags Google rich-result eligibility — true when any block satisfies the relevant rich-result requirement set.
• Scores AI-discovery readiness on a 0-100 scale, weighted toward the signals LLM crawlers actually use.
• Detects and lists every schema.org @type found across all formats.
• Optional raw-HTML dump to KVS for offline debugging.

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Who Uses Structured Data Audits?

• SEO teams — audit rich-result eligibility across a sitemap before chasing rank changes that turn out to be markup bugs.
• Content engineering — verify JSON-LD blocks ship with every article, product, or recipe page.
• AI / LLM-discovery auditors — score how well a site speaks to AI crawlers, since LLMs lean heavily on structured data.
• Migration QA — diff structured-data coverage before and after a CMS swap or template refactor.
• Competitive research — see exactly which schema.org types competitors mark up, and which ones they miss.

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How Structured Data Validator Works

1. Pass in a list of URLs. The actor caps at 15 per run by default to stay inside the Apify tester's 5-minute timeout.
2. CoreCrawler fetches the static HTML over plain HTTP. The handler runs all six extractors in parallel.
3. JSON-LD blocks are validated against the bundled schema.org rule set. Each issue is recorded with severity, path, type, and message.
4. The actor flags Google rich-result eligibility and computes the AI-discovery readiness score, then emits one row per URL.

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Input

{
  "urls": [
    "https://schema.org/Article",
    "https://www.apify.com"
  ],
  "maxItems": 5,
  "extractWhich": ["json-ld", "open-graph", "twitter-cards", "microdata", "rdfa", "meta-tags"],
  "validateAgainst": "schema.org",
  "includeRawHtml": false
}

Field	Type	Default	Description
urls	array	required	URLs to extract and validate structured data from.
maxItems	integer	5	Hard cap on URLs per run. Range 1-15.
extractWhich	array	all six	Formats to extract: json-ld, open-graph, twitter-cards, microdata, rdfa, meta-tags.
validateAgainst	enum	schema.org	Validation rule set. schema.org runs the bundled gates; none skips validation.
includeRawHtml	boolean	false	Save the fetched HTML to KVS and link via rawHtmlKvsKey on each row.

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Structured Data Validator Output Fields

{
  "url": "https://www.apify.com",
  "finalUrl": "https://www.apify.com/",
  "jsonLd": [
    "{\"@context\":\"https://schema.org\",\"@type\":\"Organization\",\"name\":\"Apify\"}"
  ],
  "openGraph": {
    "og:title": "Apify - The Web Scraping Platform",
    "og:type": "website",
    "og:url": "https://apify.com/",
    "og:image": "https://apify.com/img/social.png"
  },
  "twitterCard": { "twitter:card": "summary_large_image" },
  "microdata": [],
  "rdfa": [],
  "metaTags": { "viewport": "width=device-width, initial-scale=1", "robots": "index, follow" },
  "validationErrors": [],
  "schemaTypes": ["Organization"],
  "googleRichResultEligible": false,
  "aiDiscoveryReadiness": {
    "hasJsonLd": true,
    "hasArticleSchema": false,
    "hasFAQ": false,
    "hasHowTo": false,
    "hasOpenGraph": true,
    "score": 60
  },
  "rawHtmlKvsKey": "",
  "status": "success",
  "errorMsg": "",
  "extractedAt": "2026-04-30T12:00:00Z"
}

Field	Type	Description
url	string	Audited URL.
finalUrl	string	URL after redirects.
jsonLd	array	Parsed JSON-LD blocks as JSON-stringified objects (CSV/Excel safe).
openGraph	object	All og:* meta tags flattened into a single object.
twitterCard	object	All twitter:* meta tags flattened into a single object.
microdata	array	itemscope/itemtype blocks as JSON-stringified objects.
rdfa	array	property/typeof/resource blocks as JSON-stringified objects.
metaTags	object	All <meta name> and <meta http-equiv> tags as a flat object.
validationErrors	array	Issues formatted as <severity> [<path>] (<type>) <message>.
schemaTypes	array	Detected schema.org types (e.g. Article, Recipe, Product).
googleRichResultEligible	boolean	True when any block satisfies a Google rich-result requirement set.
aiDiscoveryReadiness	object	{hasJsonLd, hasArticleSchema, hasFAQ, hasHowTo, hasOpenGraph, score 0-100}.
rawHtmlKvsKey	string	KVS key for raw HTML when includeRawHtml=true (else empty).
status	string	success, not_found, or error.
errorMsg	string	Error message on failure (empty on success).
extractedAt	string	ISO timestamp.

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Pricing

Token charge — functionally free. Apify rejects truly $0 PPE events, so the per-record price is the smallest practical floor.

Event	Price
Actor start	$0.10
Per record	$0.0001

Volume	Cost
100 records	$0.11
1,000 records	$0.20
10,000 records	$1.10

This actor is the cheap discovery primitive that pairs with paid downstream actors. Audit liberally.

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Limits

• maxItems caps at 15 per run by default — sized for the Apify tester's 5-minute timeout.
• The schema.org validator covers the common Google-rich-result types (Article, Recipe, Product, Event, FAQPage, HowTo, VideoObject). Other types parse but skip required-field validation.
• The actor uses HTTP fetch only. Sites that require JS rendering for structured data won't surface anything — pair with a render crawler upstream.
• includeRawHtml=true writes one KVS entry per URL. KVS quotas apply.
• Validation severity is internal — validationErrors strings start with error, warn, or info for downstream filtering.

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FAQ

How do I test JSON-LD and schema markup across a whole site instead of one URL? Feed the actor a URL list (or pipe in a sitemap from Sitemap Walker Pro). It runs the same rich results check and schema.org validation on every URL in one run, so you audit the whole site in a single pass rather than pasting URLs into a single-page validator one at a time.

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Related Actors

• Sitemap Walker Pro — feed discovered URLs straight into this validator for site-wide structured-data audits.
• SSL & Security Headers Checker — pair for full SEO + security audits per URL.
• Angular SSR State Extractor — for sites where the structured data lives inside Angular's TransferState payload.

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Need More Features?

Need additional schema.org types, custom validation rules, or a render-crawler variant? File an issue or get in touch.

Why Use Structured Data Validator Pro?

• Functionally free — $0.0001 per record. Audit your whole sitemap and barely move the needle.
• Six formats, one pass — JSON-LD, Open Graph, Twitter Cards, microdata, RDFa, and meta tags in a single dataset row. Most tools cover one, maybe two.
• AI-discovery score baked in — rich-result eligibility plus an LLM-readiness score, so you know how the site reads to both Google and Claude.

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