How does the Security Headers Checker check work?

Enter or paste the content you want to check, then click the Check button. The tool analyzes your input and provides a detailed report with findings and suggestions. Everything runs locally: Target URL and other values are processed on your device, never sent to a server.

Is the Security Headers Checker free to use?

Yes, this tool is completely free with no signup required. Everything runs locally: Target URL and other values are processed on your device, never sent to a server — your data is never uploaded to any server, ensuring complete privacy and security.

What does the Security Headers Checker report include?

The report includes a detailed analysis of your input with specific findings, severity levels, and actionable suggestions. All checks run locally in your browser for instant, private results.

Security Headers Checker

Online security headers checker. Analyze CSP, HSTS, X-Frame-Options and more. Client-side detection, no registration needed.

🔗 Enter URL

Target URL

📋 Results

            Enter a URL to check...
          

🛡️ Security Checks

🔒 Content-Security-Policy

🔒 Strict-Transport-Security

🔒 X-Frame-Options

🔒 X-Content-Type-Options

🔒 Referrer-Policy

🔒 Permissions-Policy

🔒 X-XSS-Protection

What is Security Headers Checker?

Security Headers Checker is a free online tool that runs entirely in your browser. No download or signup needed — enter a URL to analyze security headers like CSP, HSTS, X-Frame-Options and more. All data is processed locally.

Use Cases

Check security headers before deploying a website
Audit compliance with security best practices
Identify missing security headers on your server
Compare security configurations across domains

Key Features

Completely Free: No registration, no limits
Privacy Safe: Data never leaves your browser
Cross-Platform: Any modern browser
Zero Dependencies: Open and use