Initial HTML
In short
Initial HTML is the version many agents read, so prices and policies must be in it. Making pages readable goes into the detail. JavaScript rendering and Structured data (JSON-LD) sit beside it in the glossary. Ora's experiment found an answer hidden in JavaScript failed a plain-fetch client on 5 of 5 topics (October 2026).
Definition
The page as your server first sends it, before any scripts run. Many agents read only this version.
A dated example
- Read 4 Nov 2026
Ora's experiment found an answer hidden in JavaScript failed a plain-fetch client on 5 of 5 topics (October 2026).
Where it matters
It is the version many agents read, so prices and policies must be in it.
Related terms
- JavaScript renderingBuilding page content in the visitor's browser with scripts after the page loads.
- Structured data (JSON-LD)Facts such as price, availability and opening hours written in a machine-readable format inside the page, usually Schema.org in JSON-LD.
Sources
- AgentReady.org guide (agentready.org), read 4 Nov 2026. Vendor claim.
Last reviewed