Security Header Audit for Public Websites
Check HTTPS, HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and cookie flag signals.
Developers, website owners, agencies, and security-conscious SEO teams.
Scan a URL, identify missing headers, and copy server/CDN-level remediation tasks.
Keyword cluster: security header audit · security headers checker · csp checker · hsts checker
- Scan the public URL.
- Review evidence and top fixes.
- Copy the developer task list.
- Create a monitor or run a bulk scan when the site matters.
What the scanner checks
Themerella checks public response headers and flags missing or weak security posture signals that can often be fixed at CDN, Nginx, framework, or hosting level.
Related action
Run a scan from the first screen, then open the matching tool or fix page below.
How to prioritize fixes
Start with HTTPS/HSTS and Content-Security-Policy, then add clickjacking, content-type sniffing, referrer, permissions, and cookie flag improvements.
Related action
Run a scan from the first screen, then open the matching tool or fix page below.
Monitoring angle
Security headers can disappear after CDN, plugin, or hosting changes. Monitor important client sites after the first cleanup.
Related action
Run a scan from the first screen, then open the matching tool or fix page below.