allows backwards compatibility with HTTP/1.0 caches, so that clients can specify a "no-cache" request that they will understand (as Cache-Control was not defined until HTTP/1.1).
Quick facts
Description
allows backwards compatibility with HTTP/1.0 caches, so that clients can specify a "no-cache" request that they will understand (as Cache-Control was not defined until HTTP/1.1).
Syntax
Pragma: no-cache
Frequently asked questions
allows backwards compatibility with HTTP/1.0 caches, so that clients can specify a "no-cache" request that they will understand (as Cache-Control was not defined until HTTP/1.1).
It is classified as a general header and can appear in requests or responses depending on context.
Sources & standards
Updated 2026-09-13
about this tool
This page provides original, human-reviewed information about HTTP headers such as Pragma, the HTTP Header Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.