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HTTP Response headers

HTTP response headers on your website are packed with tonnes of information, use our free test to check yours now.

What Are HTTP Response Headers and Why Do They Matter?

When a browser or tool requests your site, your server responds with headers—tiny metadata that carry big impact. These headers control caching, redirects, content types, security settings, and more. Whether you’re debugging, securing your app, or improving page speed, inspecting your HTTP response headers is a vital first step.

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