GLOSSARY
JSON-LD
IN ONE SENTENCE
JSON-LD is the JSON-based syntax for embedding structured data in a page, and the recommended schema.org format.
JSON-LD is the JSON-based syntax for embedding structured data in a page, and the recommended schema.org format.
01
In detail
The common failure is injecting it with a client-side script: it then exists only in the post-execution DOM, not in the returned HTML, so crawlers that do not run JavaScript see no structured data at all. The check is simple — request the page without executing scripts and grep for ld+json.
Updated 2026-08-06