Auto Sleuth: GA4 & GTM Audit

Audits a GA4 property or GTM container in seconds, straight from the UI you are logged in to.

Find what's wrong with a GA4 property or GTM container before your client does. Open any page in Google Analytics 4 or Google Tag Manager, click the Auto Sleuth icon and press Run audit. A couple of seconds later you have a checklist of pass, warn and fail results. Each one says what was found and how to fix it. There are no API keys or service accounts to set up. Auto Sleuth reads the same settings you can see, using the Google sign-in you already have open. GA4 checks • Event data retention left at 2 months when 14 is available • Reporting time zone, currency and industry category • Google signals and reporting identity • Data streams, stream URLs and enhanced measurement • Internal and developer traffic filters, including filters still in Testing • Custom dimensions whose parameter names look like personal data • Automatic events wrongly marked as key events • Event naming, channel groups, audiences and attribution windows • Links to Google Ads, BigQuery, Search Console and other products GTM checks • Unpublished changes, and workspaces nobody has touched in 30 days • Paused tags and tags with no triggers • Universal Analytics tags that are still in the container • Custom HTML tags • Consent Mode setup, and tags with no consent settings • Unused triggers and variables, duplicates and folder organisation • The live version and how versions are named Filter the results to show only failures, open them in a bigger window, or export them to CSV or JSON for a client report. Everything runs in your browser. The extension sends nothing to the developer or anyone else, and it has no analytics or tracking of its own. Auto Sleuth reads GA4 and GTM through Google's own web interface rather than an official API. If Google changes something on their side, the affected check is marked "manual" with the reason, so you know to look at it yourself.