Tag ManagementIs your Google Tag (gtag.js) set up correctly?
Enter your website URL and TagStack scans the live page to verify your Google Tag (gtag.js) implementation — duplicates, missing events, and consent problems — in seconds. Free, no login or code access needed.
1,146,883 sites in our index run Google Tag (gtag.js) — and a large share have at least one setup issue.
What the Google Tag (gtag.js) check looks for
- Only one Google Tag loads per destination — duplicates cause double-counting.
- Consent defaults are set before the tag configures Google products.
- The tag routes to the correct GA4 / Ads destination IDs.
About Google Tag (gtag.js)
The Google Tag (gtag.js) is the shared foundation that loads and configures Google products — GA4 and Google Ads — from a single snippet. It is the most common single technology in our scan corpus because nearly every Google-powered setup relies on it.
Learn more about Google Tag (gtag.js)Check other tools
Google Tag (gtag.js) setup FAQ
Enter your website URL above and TagStack scans the live page, reading the actual tags loaded in the browser. It reports whether Google Tag (gtag.js) is present and flags the most common configuration and consent problems — no login or code access required.