Security Headers Guide

Complete reference for implementing essential HTTP security headers to protect your web application.

Forces browsers to use HTTPS connections, preventing protocol downgrade attacks.

Prevents XSS attacks by controlling which resources can be loaded and executed.

Prevents clickjacking attacks by controlling whether your site can be embedded in frames.

Prevents MIME type sniffing attacks by forcing browsers to respect declared content types.

Controls how much referrer information is sent with requests.

Controls which browser features and APIs can be used in your site.

Isolates your browsing context from cross-origin documents.

Prevents other sites from loading your resources.

Requires resources to explicitly opt-in to being embedded.

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