ALAB Tag Doctor is a free Chrome extension designed for real-time web tagging audits. It provides a side panel that reveals the active tracking tags on the current webpage, their firing frequency, and any detected issues. The tool supports various platforms including Google Analytics 4, Google Ads, Meta Pixel, and more, ensuring thorough coverage of the most common tracking tools used in digital marketing.

Key features include automatic alerts for issues such as duplicate tags, excessive script weight, and missing consent modes, alongside a timeline that tracks conversion events. It updates every three seconds as users navigate, providing a dynamic view of tag performance. Additionally, it assesses performance metrics like FCP and LCP, and ensures privacy by processing all data locally without external servers.