TagCheckerKI

About

TagCheckerKI is a marketing audit tool that shows which analytics and tracking technologies are installed on any website — without opening DevTools.

How it works

Click the extension icon on any page. TagCheckerKI automatically reloads the page, intercepts all outgoing requests, and displays detected tools with their IDs in a clean table. Tags appear in real time as the page loads.

What you can detect

The extension recognizes over 40 popular platforms across several categories:

Analytics platforms — including session recording and product analytics tools used to measure user behavior and site performance.

Tag management systems — containers that load and manage third-party scripts on a page.

Advertising and retargeting pixels — scripts that track conversions and enable audience targeting across ad networks.

CRM and end-to-end analytics — platforms used for lead management, sales tracking, and revenue attribution.

Call tracking services — tools that assign phone numbers to traffic sources for offline conversion measurement.

Live chat and support widgets — customer communication tools embedded on a page.

Push notifications and email marketing — subscription and messaging platforms loaded via script.

Key features

Shows tracker IDs directly in the popup — no need to dig through page source or network requests manually.

Flags deprecated technologies in red so you can spot outdated implementations and recommend upgrades.

Real-time detection — tags appear as they are fired during page load.

One-click ID copy for quick reference.

Works as both a toolbar popup and a DevTools panel.

Search and filter to find a specific tool on complex pages.