Security Headers Checker
Check website security headers online for free. Analyze CSP, HSTS, X-Frame-Options, and other security headers with grading and recommendations.
The full version of Security Headers Checker is being built right now. We add new fully functional tools every week. In the meantime, you can use the basic workspace below.
About Security Headers Checker
Check website security headers online for free. Analyze CSP, HSTS, X-Frame-Options, and other security headers with grading and recommendations.
This tool is completely free and runs 100% in your browser. Your data is never uploaded to any server — everything is processed locally on your device for maximum privacy and speed.
About Security Headers Checker
Check website security headers online for free. Analyze CSP, HSTS, X-Frame-Options, and other security headers with grading and recommendations.
Features
- 100% free with no sign-up required
- Runs entirely in your browser for full privacy
- No data stored, no files uploaded to servers
- Works on desktop and mobile devices