GTM Scanner is a Chrome extension designed to analyze Google Tag Manager (GTM) containers loaded on current web pages. It provides a clear report detailing tags, triggers, and variables, making it an invaluable tool for marketers and developers. Users can quickly verify GTM implementations on their own or client websites, allowing for efficient documentation and auditing of tag management setups.

Key features include automatic detection of GTM containers on any webpage, displaying the count and breakdown of various tags, and listing trigger types along with their firing conditions and associated tags. Additionally, it provides an overview of variables and insights into container size and its impact on page speed. Users can easily export scan results in JSON format for further analysis or documentation.