Markup Lab.
Paste JSON-LD or fetch a live URL to visualise, validate, and explore your structured data graph, then extract the entities that power rich results and AI search.
How to use Markup Lab
1. Paste or fetch
Paste JSON-LD into the editor, fetch a live URL, or load the example to render the entity graph instantly.
2. Validate
Switch to Validator for a health score, schema.org checks, and Google rich-result eligibility with concrete fixes.
3. Extract
Run Extraction on any URL to discover its on-page signals and copy the recommended markup it should have.
What is JSON-LD structured data?
JSON-LD (JavaScript Object Notation for Linked Data) is the format Google recommends for adding structured data to a web page. It describes the entities on a page — your organisation, products, articles, reviews, FAQs — and how they relate, using the shared vocabulary at schema.org. Search engines read it to power rich results, and AI search systems use it to understand and cite your content.
Markup Lab helps you build and verify that markup: visualise the entity graph to see how everything connects, validate it against schema.org and Google’s rich-result rules, and extract the signals a live page already exposes so you know exactly what to mark up next.