An agency moved on, a developer left, or the login is simply gone — and now you can’t get into Google Tag Manager. The good news: if the container is still running on your website, you can see exactly what’s inside it without the account. Here’s how, and what you can do next.
A published GTM container is delivered to every visitor as a public JavaScript file (gtm.js). That file has to be public for your tags to run in people’s browsers. The GTM Inspector reads that same file and decodes it back into a readable list of tags, triggers and variables — so a lost login doesn’t mean lost visibility. You see what’s live, not the account.
You need either the website the container runs on, or the container ID (it looks like GTM-XXXXXX). The website is enough — the inspector finds the ID for you.
Paste the URL or GTM ID into the inspector. It reads the published container straight from the live site — no Google login, no account, nothing installed.
You get every tag, trigger and variable that's live, including the internal infrastructure GTM hides in its own UI. Document it, screenshot it, or use it to plan your next move.
Yes — for what's published. A GTM container is served as a public JavaScript file (gtm.js) on every page it runs on. The inspector reads that file, so it can show you the live configuration even when you can't access the account. It cannot show unpublished draft changes, since those were never made public.
No. Reading the public container lets you see what's live, not change it. To edit tags or publish, you need actual account access (see below). The inspector is for seeing, documenting, and recovering knowledge of a setup you've lost the login to.
Ask whoever currently has admin on the container to re-invite your email (GTM → Admin → User Management). If nobody knows who owns it, check the account email it was set up under, or the agency/developer who built it. If the container is genuinely orphaned, Google's support options for Tag Manager are limited — but you can still see and rebuild everything that's live using the inspector.
No. The inspector reads the public file and shows it to you in the browser. Nothing is saved and no login is involved.
Free, no login. Enter your website or GTM ID and read the whole container in seconds.
Open the GTM Inspector →