Missing headers are invisible
Security headers are not visible when browsing a website. You need to inspect response headers to check them.
How-To Guide
How to Check Security Headers: Audit HSTS, CSP, and More
To check security headers, inspect the HTTP response headers of a website. Security headers like HSTS, X-Frame-Options, and Content-Security-Policy protect against common web attacks. Tools like MonitorMojo make this quick and repeatable.
Common issues teams face
Headers change during updates
CMS updates, plugin changes, and server config changes can remove security headers without anyone noticing.
Clients do not track headers
Most website owners do not check security headers. Agencies add value by including them in health reviews.
How MonitorMojo helps
Inspect HSTS headers
HTTP Strict Transport Security forces HTTPS connections. Check if it is configured correctly.
Check X-Frame-Options
This header prevents clickjacking by controlling whether your site can be embedded in frames.
Review Content-Security-Policy
CSP controls which resources can load on your site, reducing XSS and data injection risks.
Run regular header checks
Include security header checks in your regular website monitoring workflow.
Who this is for
Web agencies
Add security header checks to client onboarding and maintenance workflows.
Developers
Verify headers during development and after deployments to catch misconfigurations.
Security teams
Quickly audit security headers across multiple websites.
Check security headers now
MonitorMojo checks key security headers alongside uptime, SSL, and response time. See which headers are present and which are missing.
Run Website Check