Skip to content
SEO Optimizer is live, Audit on page SEO and AI-search readiness. Try it free
Sign in
Schema Markup Checker

Does your page have anything structured to read?

Check whether a page ships JSON-LD structured data - the markup that gives search engines and AI agents a machine-readable description of what your content actually is.

Check my structured data

Common schema types

What each one is for - use the type that actually matches your content.

Organization / WebSite

Establishes who runs the site and what it's called - the baseline entity markup most sites should carry site-wide.

Article

Marks a page as an article with a headline, author, and publish date - used for blog posts and guides.

Product

Marks a page as a product listing with price and availability - relevant for ecommerce pages.

FAQPage

Marks a set of visible questions and answers as structured Q&A content, matching what's actually on the page.

BreadcrumbList

Marks a page's breadcrumb trail as structured navigation data.

Honest scope note: this is a presence check, not a validator. It tells you whether JSON-LD exists on the page - not whether every property is correctly typed. See the SEO Audit for how this fits into the broader Agent Readiness score.

How it works

Checked from the rendered page, not just the raw HTML.

Paste your URL

A real browser renders the page first, so JSON-LD injected by client-side JavaScript is caught too.

We check for JSON-LD

The rendered HTML is scanned for a script type="application/ld+json" block - present or not.

See what it's worth

Structured data presence contributes to your Agent Readiness score, alongside llms.txt and semantic landmarks.

FAQ

Frequently asked questions

No - this checks whether JSON-LD is present at all, not whether every property is correctly typed or matches Google's specific requirements for rich results. Google's own Rich Results Test is the right tool for full schema validation once you've confirmed something is there to validate.

Organization and WebSite markup on your homepage is the highest-leverage starting point - it establishes the base entity every other schema type on the site can reference. After that, add the type that matches your content: Article for blog posts, Product for ecommerce, FAQPage only where you have real, visible FAQ content on the page.

JSON-LD gives a machine-readable description of what a page is about - entities, relationships, and types - instead of forcing an AI system to infer meaning purely from prose. It's part of why this check feeds into Scanverra's Agent Readiness score alongside llms.txt and semantic HTML landmarks.

Only where the page has genuine, visible FAQ content matching the schema exactly - adding FAQPage markup that doesn't match what's visibly on the page is a real risk for a manual action from Google, not just wasted effort.

Related audits

Website Audit

Run a free instant audit for performance, SEO, accessibility, and best practices.

SEO Audit

Check crawlability, metadata, structured data, and AI-agent discoverability.

Performance Audit

A full lab performance audit across desktop and mobile, with framework-aware fixes.

Accessibility Audit

See exactly which WCAG 2.1/2.2 success criteria your site fails, and why.

Security Audit

Turn a header/vulnerability scan into SOC 2 and GDPR control evidence.

Website Speed Audit

How fast your site loads, in plain language - one number, no jargon.

Core Web Vitals Audit

Check LCP, CLS, and INP against Google's thresholds, lab and field.

Broken Link Checker

Crawl a page's links and find the ones that are dead before your users do.

Security Headers Checker

CSP, HSTS, and every other HTTP security header - analyzed, not just listed.

Open Graph Checker

See whether your page has the og:title, og:description, and og:image tags social platforms need.

Sitemap Checker

Check whether your sitemap.xml is reachable, valid, and free of common mistakes.

Redirect Checker

Trace a URL's redirect chain and catch loops, excess hops, and HTTPS-to-HTTP downgrades.

SSL Checker

Test your SSL certificate for expiry, hostname match, chain trust, TLS version, key strength and HSTS in seconds.

Color Contrast Checker

Calculate the WCAG contrast ratio of any two colors and see AA and AAA results, with a suggested accessible color.

Website Technology Checker

Find out which CMS, framework, ecommerce platform and libraries a website is built with.

robots.txt Checker

Check syntax, sitemap lines and size limits, and test whether Googlebot or any crawler can access a URL.

Canonical Checker

Find missing, duplicate, relative or conflicting canonical tags and check that the canonical URL loads.

Hreflang Checker

Validate language codes, x-default and self-references, and confirm every alternate page links back.

Meta Tag Checker

Check title tags, meta descriptions, H1 headings, robots, viewport and Open Graph tags on any page.

HTTP Status Checker

Check up to 20 URLs at once for 200, 301, 404 and 500 responses and redirect chains.

CSP Evaluator

Check a Content-Security-Policy for unsafe-inline, unsafe-eval, wildcards, missing object-src and base-uri, from a URL or pasted policy.

Mixed Content Checker

Find http:// scripts, stylesheets, iframes and images on HTTPS pages that browsers block or warn about.

Alt Text Checker

Find images with missing, empty, file-name or overly long alt text on any page, for accessibility and image SEO.

API Key Leak Checker

Scan a website's public HTML and JavaScript for exposed API keys, tokens and secrets.

MCP Security Scanner

Find unpinned MCP servers, leaked tokens and risky agent settings in your repo.

Vibe Coding Security

Check AI-written code for secrets, injection flaws and risky dependencies.

ADA Compliance Checker

Test your site against the WCAG criteria ADA cases reference.

EAA Compliance Checker

Check your site against the WCAG basis of the European Accessibility Act.

For Agencies

Audit client sites for SEO, speed, accessibility and security on one team plan.

Free - no sign-up required

Check your structured data for free

See whether your page has JSON-LD, and how that feeds your Agent Readiness score.

Run free audit