indicates how long the results of a preflight request can be cached in a preflight result cache
Quick facts
Description
indicates how long the results of a preflight request can be cached in a preflight result cache
Syntax
Access-Control-Max-Age: 600
Frequently asked questions
indicates how long the results of a preflight request can be cached in a preflight result cache
It is classified as a response 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 Access-Control-Max-Age, the HTTP Header Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
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