What is an HTTP security header?

Security headers are response parameters that direct browser clients on how to handle content execution, mitigating cross-site scripting (XSS) and clickjacking attacks.

How does the security grader rate sites?

It evaluates headers like Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), and Referrer-Policy, yielding grades from A+ to F.

What is a Content Security Policy (CSP)?

CSP restricts dynamic resource sources (scripts, images, styles) that browsers are permitted to load on a webpage.

How can I fix missing security headers?

Add proper configuration lines inside your web server files, such as `.htaccess` for Apache or `nginx.conf` for Nginx.

Does this tool query endpoints directly?

Yes, it uses a secure proxy to fetch server response headers, keeping your client IP hidden.

HSTS (HTTP Strict Transport Security) forces browsers to connect to websites only via secure HTTPS protocols.

Why is X-Content-Type-Options important?

It prevents browser clients from sniffing MIME types, blocking drive-by download attacks.

Can I inspect private local servers?

The proxy endpoint can only inspect public, reachable internet domains.

Is my website audit logged?

No, all queries are temporary, and results are never stored.

Is this header analyzer free?

Yes, it is 100% free with no registration required.

Is the HTTP Header Analyzer & Security Grader tool on HandyToolsBox safe to use?

Yes, absolutely! The HTTP Header Analyzer & Security Grader runs entirely locally inside your browser sandbox. No file uploads or textual contents are ever sent to our remote servers, protecting your security and privacy 100%.

Do I need to install any software to use the HTTP Header Analyzer & Security Grader?

No installation, extensions, or setup is required. All tools are fully web-based and execute using native HTML5 and JavaScript client-side operations.

HTTP Header Analyzer & Security Grader

Free online http header analyzer & security grader tool. Analyze HTTP response headers for any URL and get a security grade. Check for HSTS, CSP, X-Frame-Options, and CORS headers. Free online tool, no signup required. No signup or download required, processes completely in your browser for maximum privacy.

HTTP Header Analyzer & Security Grader

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