Security Headers & SSL Posture Inspector
Audit your public web application in real-time against OWASP security benchmarks. Get an instant A-F posture grade, detailed vulnerability explanations, and production-ready configuration snippets.
Security Headers & SSL Posture Inspector
Audit your live HTTP response headers against OWASP security benchmarks. Detect missing CSP, HSTS, Clickjacking vulnerabilities, and server info leakage in seconds.
Frequently Asked Questions
Understanding HTTP security header configuration and compliance.
What are HTTP security headers and why do they matter?
HTTP security headers are directives sent by your web server to the user's browser. They establish strict security boundaries, preventing common web attack vectors like Cross-Site Scripting (XSS), Clickjacking, code injection, SSL downgrade attacks, and unauthorized hardware access.
How does Content-Security-Policy (CSP) prevent XSS?
A Content-Security-Policy restricts the sources from which scripts, styles, images, and fonts can load and execute. By blocking inline scripts and unauthorized third-party origins, CSP neutralizes injected malicious JavaScript even if an application has an underlying sanitization vulnerability.
What is HSTS and why should I include the preload directive?
HTTP Strict Transport Security (HSTS) instructs modern browsers to only ever connect to your domain over HTTPS. Submitting your domain to the HSTS Preload list hardcodes this rule directly into Google Chrome, Apple Safari, and Mozilla Firefox, completely preventing SSL stripping and man-in-the-middle attacks on the very first connection.
Do security headers impact website SEO or performance?
No. Security headers are tiny string directives (less than 1KB) processed instantly during the initial HTTP handshake. Implementing them actually protects your domain reputation, prevents search engine malware blacklisting, and improves SOC-2 / ISO compliance.
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