Missing headers expose vulnerabilities
Websites without proper security headers are more vulnerable to clickjacking, MIME-type sniffing, and other common attacks.
Best Tools
Best Security Header Checker Tools for 2026
Security headers protect websites against common attacks. Checking whether HSTS, X-Frame-Options, X-Content-Type-Options, and other headers are present helps agencies and developers identify missing security configurations.
No credit card required · Real checks only · Sample monitoring workflow shown
Example check preview
Website health signals, not live monitoring data
Website reachableok
HTTPS activeok
Response time signalreview
SSL/domain notereview
Risk summaryreview
The Problem
Small misses turn into public failures fast.
Headers change during updates
Security headers can be removed or misconfigured during site updates, redeployments, or CMS changes.
Agencies need a quick check
Manually inspecting response headers for each client site is time-consuming. A tool that automates the check saves time.
How It Works
1
Add your domain
Enter the website, subdomain, or client property you need to protect.
2
MonitorMojo checks it
Run a real reachability, HTTPS/SSL, response time, and configured health check.
3
Review what needs attention
Use the returned signals to decide what to fix before a browser error or complaint.
Features
Website health checks built for the signals teams forget until they hurt.
security
MonitorMojo
Checks security headers alongside uptime, SSL, and response time. Includes HSTS, X-Frame-Options, X-Content-Type-Options, and more.
security
SecurityHeaders.com
Dedicated security header analysis with letter grading. Deep technical assessment of header configurations.
security
Mozilla Observatory
Open-source security header scanner with best-practice recommendations. Good for compliance checks.
Who This Is For
Built for teams closest to the website.
Web agencies
Check security headers for client websites as part of regular health reviews.
Developers
Verify headers during staging and after production deployments.
Security consultants
Quickly audit multiple client websites for missing or misconfigured security headers.
FAQ
Questions teams ask before they check website health.
What are security headers?
HTTP security headers are response headers that tell browsers how to handle website content securely. Common headers include HSTS, X-Frame-Options, X-Content-Type-Options, and Content-Security-Policy.
Why are security headers important?
Security headers protect against attacks like clickjacking, MIME-type sniffing, and cross-site scripting. Missing headers leave websites more vulnerable.
Does MonitorMojo check security headers?
Yes. MonitorMojo checks for key security headers including HSTS, X-Frame-Options, X-Content-Type-Options, and others as part of its website health check.