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HTTP Headers Analyzer

Enter a URL to fetch the complete HTTP response headers returned by the server. This tool automatically analyzes key security configurations (Security Headers) and points out potential security risks or privacy leakage issues.

Why are HTTP Headers Important?​

HTTP response headers not only tell the browser how to handle content (such as caching, encoding) but also bear important security responsibilities. For example, configuring Strict-Transport-Security forces the browser to use HTTPS, and configuring X-Frame-Options prevents clickjacking attacks.

Common Security Headers​

  • Strict-Transport-Security (HSTS): Forces clients (browsers) to use HTTPS to connect to the server, preventing man-in-the-middle attacks.
  • Content-Security-Policy (CSP): Restricts the sources of resources (scripts, images) that can be loaded in the webpage, effectively defending against XSS attacks.
  • X-Frame-Options: Controls whether the webpage can be embedded in <frame> or <iframe>, preventing clickjacking.
  • X-Content-Type-Options: Prohibits browsers from sniffing file types, forcing the use of the Content-Type declared by the server.