Articles & Guides

A complete reference of all HTTP status codes from 100 to 599 with descriptions and examples. Learn what each code means and how to handle it.

How to protect your website with HTTP security headers. Configuring Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and other headers.

HTTP request and response headers in depth: every Cache-Control directive, ETag and 304, Vary, Content-Type, X-Forwarded-For, nginx config and curl checks.