Security Header Checker

Check website security headers and get recommendations to improve your site's security posture.

Use this tool to check if your website implements recommended security headers. Good security headers can protect your site from common web vulnerabilities like XSS, clickjacking, and data injection attacks.

Simply enter your website URL below, and the tool will check its HTTP response headers and provide a security score and recommendations for improvement.

Enter the URL of the website you want to check.

About Security Headers

Security headers are HTTP response headers that, when set by a web server, can enhance the security of a website by enabling browser security features and protecting against common web vulnerabilities.

Critical Headers

  • Content-Security-Policy (CSP): Helps prevent Cross-Site Scripting (XSS) and data injection attacks by controlling which resources can be loaded by the browser.
  • Strict-Transport-Security (HSTS): Forces browsers to use HTTPS connections to your site, preventing man-in-the-middle attacks and SSL stripping.

Important Headers

  • X-Content-Type-Options: Prevents browsers from MIME-sniffing a response away from the declared content-type, reducing the risk of drive-by downloads.
  • X-Frame-Options: Protects against clickjacking attacks by disallowing your site to be embedded in frames on other sites.

Recommended Headers

  • Referrer-Policy: Controls how much referrer information is included with requests, enhancing privacy.
  • Permissions-Policy: Restricts which browser features and APIs can be used in a document, reducing attack surface.
  • Cross-Origin headers: COEP, COOP, and CORP headers provide additional isolation for web applications.

Useful Resources

Why Security Headers Matter

  • Prevent Common Attacks

    Protection against XSS, clickjacking, code injection, and other common web vulnerabilities.

  • Enforce HTTPS

    Keep connections secure and prevent downgrade attacks with HSTS.

  • Enhance Privacy

    Control what information is shared between sites with Referrer-Policy.

  • Improve Security Scores

    Many security scanners and assessments check for these headers.

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