Security Header Checker
1. Paste HTTP Headers
Load Sample
2. Security Evaluation
How to Use the Security Header Checker
- Enter the URL you wish to test.
- Click “Scan Security Headers”.
- Review your overall security grade.
- Identify missing or misconfigured headers.
- Apply the suggested configurations to your web server.
Technical Logic
The tool fetches the HTTP response headers. It checks for the presence and syntax of essential security headers like HSTS, CSP, and X-Frame-Options. It scores the configuration based on industry best practices and flags deprecated headers.
Key Features
- Automated grading system.
- Content Security Policy (CSP) validation.
- Strict Transport Security (HSTS) detection.
- Actionable remediation advice.
Reference Table: Essential Security Headers
| Header Name | Primary Purpose |
|---|---|
| Strict-Transport-Security | Enforces HTTPS connections. |
| Content-Security-Policy | Prevents XSS and data injection. |
| X-Frame-Options | Prevents clickjacking attacks. |
| X-Content-Type-Options | Stops MIME-sniffing. |
FAQ
What is Content-Security-Policy (CSP)?
CSP is a header that restricts the resources (like scripts and images) a browser is allowed to load, drastically reducing the risk of cross-site scripting (XSS).
Do I need all security headers?
While not all are strictly mandatory for every site, implementing the core headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options) is a baseline best practice for modern web security.