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Find the right check.
Open any SEOMarkup checker or information page directly.
Checker pages
Schema Markup Checker
Check Schema.org markup from a public URL. Find JSON-LD, Microdata and RDFa, review syntax issues, and see the exact source evidence.
Structured Data Checker
Inspect structured data on a public page. Review JSON-LD, RDFa and Microdata types, syntax, identifiers and source evidence in one report.
JSON-LD Validator
Validate JSON-LD blocks from a public URL. Find invalid JSON, review Schema.org types, nested entities, @id values and formatted source.
Social Media Preview Checker
Preview how a public page may look when shared on Facebook, X/Twitter and LinkedIn, plus a Google-style search preview.
Open Graph Checker
Check Open Graph tags from a public URL. Review og:title, og:description, og:image and og:url with Facebook and LinkedIn previews.
Twitter Card Checker
Check Twitter Card metadata and preview X/Twitter link cards. Review card type, title, description and image from a public URL.
Meta Tag Checker
Check SEO meta tags from a public URL, including title, description, canonical, robots, language, viewport, headings and social metadata.
Tracking Pixel Checker
Find common tracking pixels, analytics, advertising, consent, replay and monitoring tags in a public page source, with direct evidence.
Site information
SEOMarkup home
Check a URL, review the extension, and download it for local inspection.
Privacy policy
Understand the separate privacy boundaries for the website and Chrome extension.
XML sitemap
Open the machine-readable list of canonical SEOMarkup pages.
SEOMarkup