Inspect the hidden HTTP response headers any server sends. Check for security policies, cache controls, and server configurations to optimize your site's performance and SEO.
Every time you visit a website, your browser and the server engage in a silent conversation. This dialogue happens through HTTP headers. While the content of the page is what you see, the headers contain vital instructions on how that content should be handled. Our HTTP Header Checker allows you to peek behind the curtain and see exactly what a server is communicating.
For developers and SEO specialists, headers are a goldmine of information. They tell you if a page is being cached correctly, what type of server is being used, and whether security protocols are active. For instance, checking the X-Robots-Tag is crucial for SEO, much like using a Robots.txt Generator to manage crawler access.
Furthermore, headers like Content-Type ensure that the browser interprets your data correctly, whether it's an HTML file, a JSON response, or an image. If these are misconfigured, your site might appear broken or fail to load entirely.
Technical SEO isn't just about what's on the page; it's about how the server delivers it. By verifying headers, you can ensure that your URL slugs are resolving correctly without unnecessary redirect chains that bleed "link juice" and slow down user experience.
Request headers are sent by the browser to the server (e.g., "I want this page in English"). Response headers are sent by the server back to the browser (e.g., "Here is the page, it's an HTML file, and don't cache it for more than an hour").
A 404 status code in the HTTP header indicates that the server could not find the requested resource. This is a common error when a URL is mistyped or a page has been deleted without a redirect.
This online tool requires the URL to be publicly accessible. To check headers on a local site (like localhost), you should use your browser's Developer Tools (Network tab) or a command-line tool like cURL.