A tool for analyzing and understanding HTTP security headers in web applications. HeaderSentry checks for the presence of important security headers, explains their significance, and guides developers in implementing them correctly.
Security Analysis
Check your website's security headers and understand your security posture
Educational Resource
Learn about each security header's purpose and the risks it helps mitigate
Implementation Help
Get code snippets and examples for proper security header implementation
Context-Aware
Understand which headers matter for your specific use case
Key Features
🛡️ Security Header Checking
- Analysis of 10 important security headers
- Clear visual indicators for present/missing headers
- Priority indicators for each header
- Contextual information
📚 Developer Education
- Clear explanations of security concepts
- Common vulnerability examples
- Implementation best practices
- Use-case guidance
💻 Developer Experience
- Simple, clean interface
- Implementation examples
- Easy-to-understand results
- Straightforward header checking
Technology Stack
- Framework: Next.js 14
- Language: TypeScript
- Styling: Tailwind CSS
- Icons: Lucide
Security Headers Analyzed
| Header | Protection | Priority |
|---|---|---|
| Content-Security-Policy | XSS, Injection Attacks | Critical |
| Strict-Transport-Security | MITM Attacks | Critical |
| X-Frame-Options | Clickjacking | High |
| X-Content-Type-Options | MIME Sniffing | Medium |
| Permissions-Policy | Feature Control | High |
| Referrer-Policy | Information Leakage | Medium |
| Cross-Origin Headers | Resource Isolation | Medium |
| Cache-Control | Data Exposure | Medium |
| Clear-Site-Data | Data Cleanup | Medium |
Made With
- 💡 Security-focused design
- 🎯 Developer-friendly interface
- 📊 Clear result visualization
Open Source
HeaderSentry is open source and welcomes contributions. The project aims to help developers better understand and implement web security headers.
Visit github.com/dmc2015/header-sentry to contribute.