WhatHappened

Tracking since Apr 23, 2026.

Changelog

• May 16, 2026
  description

  Stop jumping between ten different web tools just to check a single DNS record or verify an SSL certificate. WhatHappened centralizes essential web infrastructure diagnostics into a single, keyboard-driven terminal located right in your browser side panel. It is built to eliminate the friction of modern web debugging.
  
  This tool allows you to analyze any domain in real-time, providing comprehensive data on hosting providers, name servers, and security headers. It is context-aware, meaning it automatically detects the website you are viewing, allowing for one-click audits that reveal the "ground truth" of any site's infrastructure.
  
  By installing WhatHappened, you gain a powerful educational and professional utility that translates complex technical data into actionable information. It is the fastest way to understand what is happening under the hood of the web, maintained with a strict commitment to performance and security.

  WhatHappened is a terminal emulator that lives in your Chrome side-panel for web infrastructure auditing.
  
  It provides a set of diagnostic tools for web developers and researchers to audit websites without leaving the active tab. All queries are executed locally, ensuring your diagnostic data remains private.
  
  WHAT CAN YOU DO?
  - Network Audits: Check DNS records (A, MX, TXT, CNAME) and verify DNSSEC.
  - Security Checks: Inspect SSL/TLS certificates and security headers (CSP, HSTS, etc.).
  - Stack Detection: Identify hosting providers and server-side technologies using live network data.
  - Environment Testing: Simulate different network conditions using throttling and user-agent overrides.
  
  CORE PRINCIPLES:
  - Local Execution: No servers, no tracking. Everything runs in your browser.
  - Open and Safe: Uses standard libraries like DOMPurify for sanitization. No hidden remote code.
  - POSIX-style: Supports basic piping (e.g., dig | grep) for simple data filtering.
  - Non-intrusive: Works from the Chrome Side Panel to keep your main window clear while you work.
  
  KEY FEATURES:
  - Commands: dig, host, map, ssl, headers-check, waf, cookies, vitals.
  - Sudo Mode: A simulated privilege layer to prevent running high-impact tools by mistake.
  - Guided Help: Every command includes technical context on what it does and when to use it.
  
  NO DATA COLLECTION:
  WhatHappened does not collect, store, or transmit any user data. It is a free tool for the developer community.

• May 16, 2026
  permissions

  activeTab, tabs, sidePanel, storage, scripting, cookies, clipboardRead, browsingData, contentSettings

  activeTab, tabs, sidePanel, storage, scripting, cookies, browsingData, contentSettings, declarativeNetRequest, debugger, alarms

• May 10, 2026
  description

  A terminal in your Chrome side panel to debug web infrastructure (DNS, SSL, HTTP headers, emails).
  We built this because we were tired of jumping between 10 different web tools just to check a DNS record or see why an SSL cert is failing.

  Stop jumping between ten different web tools just to check a single DNS record or verify an SSL certificate. WhatHappened centralizes essential web infrastructure diagnostics into a single, keyboard-driven terminal located right in your browser side panel. It is built to eliminate the friction of modern web debugging.
  
  This tool allows you to analyze any domain in real-time, providing comprehensive data on hosting providers, name servers, and security headers. It is context-aware, meaning it automatically detects the website you are viewing, allowing for one-click audits that reveal the "ground truth" of any site's infrastructure.
  
  By installing WhatHappened, you gain a powerful educational and professional utility that translates complex technical data into actionable information. It is the fastest way to understand what is happening under the hood of the web, maintained with a strict commitment to performance and security.

• May 10, 2026
  short_description

  An educational side panel terminal. Learn how to diagnose DNS, SSL, and email infrastructure using simple, guided commands.

  Your friendly side panel terminal! Learn how to diagnose DNS, SSL, and email infrastructure using simple, guided commands.

• May 10, 2026
  name

  WhatHappened Terminal

  WhatHappened

• May 10, 2026
  host_permissions

  https://dns.google/*, https://rdap.org/*, https://crt.sh/*, https://*/*, http://*/*

  https://dns.google/*, https://rdap.org/*, https://crt.sh/*, https://isitdown.site/*, https://*/*, http://*/*

• May 10, 2026
  permissions

  activeTab, tabs, sidePanel, storage, scripting, clipboardRead

  activeTab, tabs, sidePanel, storage, scripting, cookies, clipboardRead, browsingData, contentSettings

Permissions & access

Permissions

activeTabtabssidePanelstoragescriptingcookiesbrowsingDatacontentSettingsdeclarativeNetRequestdebuggeralarms

Host access

https://dns.google/*, https://rdap.org/*, https://crt.sh/*, https://isitdown.site/*, https://*/*, http://*/*

Screenshots