WhatHappened is a free Chrome add-on designed to simplify the process of diagnosing web infrastructure issues. This tool integrates a terminal directly into the browser's side panel, allowing users to run guided commands for checking DNS records, SSL certificates, and more without switching between multiple tools. With its user-friendly interface, it centralizes essential diagnostics, making it a valuable resource for both educational and professional purposes.

The application offers real-time analysis of any domain, providing users with detailed insights into hosting providers, name servers, and security headers. Its context-aware feature automatically detects the website being viewed, enabling one-click audits for a quick assessment of the site's infrastructure. WhatHappened is built for efficiency and security, making it an indispensable utility for anyone looking to understand web diagnostics more effectively.