Security & Headers · Security Headers Check
Security Headers Checker
Inspect HTTP security headers on any public URL.
- slug
- security-headers-checker
- visibility
- Public
- risk
- safe
- level
- 0
activesafemvp
01overview
What this tool does.
Fetches a URL server-side and reports on the presence, absence and value of the most common security response headers.
Useful to quickly audit the security posture of a public endpoint without running a full scanner.
02documentation
Dev-docs · 2 documents.
editorial
Related articles.
articleApr 20, 2026
What Security Headers Actually Tell You
Security headers are not magic. Here is what they do, what they don't, and how to read them.
guideApr 20, 2026
Getting Started with Public Surface Analysis
A beginner-friendly walkthrough of what you can responsibly learn from a public URL.
guideApr 20, 2026
A Responsible Method for Reconnaissance on Public Web Surfaces
Reconnaissance is not inherently malicious. Here is how to do it ethically, legally and systematically.
articleApr 20, 2026
How to Turn Weak Signals into Better Questions
OSINT is not about finding smoking guns. It is about asking better questions.