Marketing Tag Radar - GA4/GTM Debugger

Local browser diagnostics for marketing measurement tags on the current page.

Marketing Tag Radar is a Chrome extension for teams that need to review browser-visible marketing measurement implementation quickly. It visualizes captured tag requests, page-level implementation signals, cookies, consent hints, dataLayer activity, JavaScript variable summaries, and technology candidates in the Chrome side panel. Diagnostics run locally in the browser. The extension does not automatically send captured diagnostic data to the developer's servers or third-party servers. Key capabilities: - Review measurement events, IDs, collection routes, session quality, and conversion-quality signals - Review tag management, dataLayer activity, page variables, duplicate firing, and consent-related signals - Organize cookie attributes, unknown traffic, and technology candidates with supporting evidence - Show an implementation score, firing timeline, prioritized action queue, and expected-vs-observed comparisons - Export audit reports as JSON, Markdown, or CSV This extension does not claim to prove every admin setting or server-side send. It helps teams quickly understand the marketing-measurement signals that are visible from the browser: network requests, HTML, cookies, dataLayer, JavaScript variables, and captured tag activity.