HTTP Headers Analyzer

Inspect HTTP response headers from a website and analyze security implications.

HTTP Headers Analyzer

Enter a URL to analyze its HTTP response headers.

About HTTP Headers

HTTP headers are key-value pairs sent in HTTP requests and responses. They provide important metadata about the request or response, and can significantly impact security, caching, and browser behavior.

Security Headers

Security headers are HTTP response headers that help protect against common web vulnerabilities:

Strict-Transport-Security (HSTS): Forces browsers to use HTTPS
Content-Security-Policy (CSP): Prevents XSS attacks by controlling resource loading
X-Content-Type-Options: Prevents MIME type sniffing
X-Frame-Options: Protects against clickjacking
Referrer-Policy: Controls how much referrer information is included with requests

Common Header Categories

Content Headers

Content-Type
Content-Length
Content-Encoding
Content-Language

Caching Headers

Cache-Control
ETag
Expires
Last-Modified

CORS Headers

Access-Control-Allow-Origin
Access-Control-Allow-Methods
Access-Control-Allow-Headers

Server Headers

Server
X-Powered-By
Via

Why Analyze Headers?

Analyzing HTTP headers can help identify security vulnerabilities, debug issues, understand caching behavior, and ensure proper configuration of web servers and applications. Regular header analysis is an important part of web security audits and performance optimization.

HTTP Headers Analyzer