🔍 HTTP Header Analyzer

Analyze HTTP headers for security vulnerabilities and best practices

Version 2.0.0 - Updated November 2025
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Enter the full URL (including https://) to fetch and analyze its HTTP headers automatically.
85
Security Score

Security Issues & Recommendations

Detected Headers

đŸŽ¯ HTTP Header Examples

✅ Secure Headers Example

A well-configured set of security headers:

Strict-Transport-Security: max-age=31536000; includeSubDomains X-Frame-Options: DENY X-Content-Type-Options: nosniff Content-Security-Policy: default-src 'self' X-XSS-Protection: 1; mode=block Referrer-Policy: strict-origin-when-cross-origin

⚠ī¸ Missing Security Headers

Common but insecure configuration:

Content-Type: text/html; charset=UTF-8 Server: Apache/2.4.41 Date: Mon, 01 Nov 2025 12:00:00 GMT

Issues: No HSTS, CSP, frame protection, or XSS protection

🔐 Content Security Policy

Example of a strict CSP header:

Content-Security-Policy: default-src 'none'; script-src 'self' https://cdn.example.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' https://fonts.gstatic.com;

🛡ī¸ CORS Headers

Proper CORS configuration:

Access-Control-Allow-Origin: https://trusted-site.com Access-Control-Allow-Methods: GET, POST, PUT Access-Control-Allow-Headers: Content-Type Access-Control-Max-Age: 86400

📚 HTTP Security Headers Tutorials

🔒

Understanding Security Headers

A complete guide to HTTP security headers and why they matter for web application security.

Read Tutorial →
🛡ī¸

Content Security Policy (CSP)

Master CSP configuration to prevent XSS attacks and unauthorized content injection.

Read Tutorial →
🔐

HSTS Best Practices

Learn how to implement HTTP Strict Transport Security for maximum HTTPS enforcement.

Read Tutorial →
🌐

CORS Configuration Guide

Properly configure Cross-Origin Resource Sharing without compromising security.

Read Tutorial →
đŸŽ¯

Cookie Security Flags

Understand Secure, HttpOnly, and SameSite cookie attributes for better protection.

Read Tutorial →
⚡

Performance vs Security

Balance security headers with website performance and user experience.

Read Tutorial →

⚖ī¸ Security Headers Tools Comparison

Compare our HTTP header analyzer with other popular security testing tools:

Feature Our Tool SecurityHeaders.com Mozilla Observatory Chrome DevTools
Free to Use ✅ ✅ ✅ ✅
URL Scanning ✅ ✅ ✅ ❌
Manual Header Input ✅ ❌ ❌ ✅
Security Score ✅ ✅ ✅ ❌
Detailed Explanations ✅ ✅ ✅ ❌
Educational Content ✅ ❌ (Limited) ✅ ❌
Report Download ✅ ❌ ✅ (PDF) ❌
Offline Analysis ✅ ❌ ❌ ✅
Mobile Friendly ✅ ✅ ✅ ❌

Key Security Headers Explained

🔒 Strict-Transport-Security

Purpose: Forces browsers to use HTTPS connections only

Recommended: max-age=31536000; includeSubDomains; preload

🛡ī¸ Content-Security-Policy

Purpose: Prevents XSS attacks by controlling resource sources

Recommended: default-src 'self'; script-src 'self'

đŸšĢ X-Frame-Options

Purpose: Prevents clickjacking attacks

Recommended: DENY or SAMEORIGIN

🔐 X-Content-Type-Options

Purpose: Prevents MIME type sniffing

Recommended: nosniff

📝 Version History & Changelog

Version 2.0.0 - Latest

November 1, 2025
  • 🎉 Added dual input methods: URL fetching and manual paste
  • 📊 Enhanced security scoring algorithm
  • 🔍 Improved header detection and analysis
  • 💾 Added report download functionality
  • 📱 Better mobile responsiveness
  • 🎨 Complete UI redesign with modern styling

Version 1.5.0

October 15, 2025
  • 🛡ī¸ Added CSP directive parsing
  • 📚 Expanded educational content and examples
  • ⚖ī¸ Added tool comparison feature
  • 🔧 Fixed CORS header detection issues
  • ✨ Improved recommendations clarity

Version 1.0.0

September 20, 2025
  • 🎉 Initial release of HTTP Header Analyzer
  • 🔍 Basic header detection and analysis
  • 📊 Security scoring system
  • 📋 Copy and share functionality
  • ✨ Clean, modern user interface

🔮 Upcoming Features

📋 Planned for Next Release:

  • Historical header comparison
  • Batch URL scanning
  • API integration for automated testing
  • Custom security policy templates
  • Integration with CI/CD pipelines
  • Scheduled monitoring and alerts

Understanding HTTP Security Headers

HTTP security headers are directives sent by web servers to browsers, instructing them how to handle content and protect against common web vulnerabilities. Proper implementation of these headers is crucial for web application security.

đŸŸĸ Essential Security Headers

✅ Must-Have Headers:

  • Strict-Transport-Security (HSTS): Enforces HTTPS connections and prevents protocol downgrade attacks
  • Content-Security-Policy (CSP): Mitigates XSS attacks by controlling resource loading
  • X-Frame-Options: Protects against clickjacking by controlling frame embedding
  • X-Content-Type-Options: Prevents MIME type sniffing attacks
  • Referrer-Policy: Controls what referrer information is sent with requests

🔴 Common Security Misconfigurations

❌ What to Avoid:

  • Missing HSTS header on HTTPS sites
  • Overly permissive Content-Security-Policy (using 'unsafe-inline' or 'unsafe-eval')
  • Exposing server version information
  • Using ALLOW-FROM for X-Frame-Options (deprecated)
  • Not implementing security headers at all
  • Misconfigured CORS allowing any origin (*)

How Our Analyzer Works

Our HTTP Header Analyzer performs comprehensive security analysis by:

  1. Fetching or parsing HTTP response headers
  2. Checking for presence of critical security headers
  3. Validating header configurations against best practices
  4. Calculating an overall security score
  5. Providing actionable recommendations for improvements

Best Practices for Implementation

🛡ī¸ Recommended Security Tools

Enhance your web security with these professional tools and services:

Cloudflare

DDoS Protection & CDN

Sucuri

Website Security Platform

Qualys SSL Labs

SSL/TLS Testing

Burp Suite

Security Testing Tool

OWASP ZAP

Vulnerability Scanner