Check HTTP Response Headers

Enter your website URL below to check its HTTP response headers.

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HTTP Response Header Checker

Instantly analyze the HTTP response headers returned by any website. This tool helps web developers, security professionals, and site owners inspect server configurations, security policies, caching rules, and more—just by entering a URL.

What Are HTTP Response Headers?

HTTP response headers are key-value pairs sent by a web server in response to a browser or client request. They provide metadata about the response, such as content type, caching, security, cookies, and redirection information. Understanding these headers is essential for optimizing performance, security, and troubleshooting web issues.

Why Use This Tool?

  • Security: Check for important headers like Strict-Transport-Security, Content-Security-Policy, and X-Frame-Options to ensure your site is protected against common attacks.
  • Performance: Review caching headers such as Cache-Control and Expires to optimize load times and reduce server load.
  • Debugging: Quickly identify issues with redirects, cookies, or content delivery by inspecting headers like Location, Set-Cookie, and Content-Type.
  • Compliance: Ensure your site meets industry standards and best practices for privacy and security.

How to Use the HTTP Response Header Checker

  1. Enter the full website URL (e.g., https://example.com) in the input field above.
  2. Click the Check Headers button.
  3. View a detailed list of all HTTP response headers returned by the server, including their values and explanations.
  4. Use the results to improve your website’s security, performance, and reliability.

Common HTTP Response Headers Explained

  • Content-Type: The media type of the resource (e.g., text/html, application/json).
  • Cache-Control: Directives for caching mechanisms in both requests and responses.
  • Strict-Transport-Security (HSTS): Enforces secure (HTTPS) connections to the server.
  • Content-Security-Policy (CSP): Helps prevent cross-site scripting (XSS) and other code injection attacks.
  • X-Frame-Options: Protects against clickjacking by controlling whether a page can be displayed in a frame.
  • Set-Cookie: Sends cookies from the server to the client.
  • Location: Used for redirection to a different URL.
  • Server: Information about the web server software.

Tip: For best results, make sure to enter the full URL including https:// or http://. This tool only checks response headers and does not follow JavaScript-based redirects or load page content.