Audit your Google Tag Manager container for unused tags, missing consent configuration, vendor-specific checks, governance issues and more. Generate full dependency documentation from a JSON export in seconds with no account needed, or connect to your GTM account to list all your containers.
Load a Container
Connect via GTM API
Authorize read-only access via OAuth.
Fetches live data.
Upload JSON Export
Export from GTM under Admin.
No account needed.
What GTM Audit and Doc generator by Assertionhub does
Load a container and the tool immediately flags configuration issues, maps dependencies between every element, and generates exportable documentation. Everything runs locally in your browser.
Automated health checks
The tool scans your container for configuration issues: missing consent setup, unused tags, ecommerce tracking gaps, broad triggers, and tells you how to fix each one.
Element dependency map
Every tag, trigger, and variable mapped as an interactive graph. See what depends on what before you change anything.
Documentation export
Export your full container as CSV, JSON, or a self-contained HTML file with clickable links between all elements. Useful for handovers, reviews, or keeping a record.
Inline notes per element
Annotate any tag, trigger, or variable. Notes are saved in your browser and included in every export.
Runs in your browser
Everything is processed locally. Your container data is never uploaded to any server, useful when working with client accounts.
JSON export or live API
Upload a container export from GTM Admin, or connect via read-only OAuth to fetch live data. Both paths work the same way.
| Tool | Audit results | Documentation generator | Format | Element dependency map |
|---|---|---|---|---|
| AssertionHub GTM Auditthis tool | Yes – instant | Yesexportable | JSON · CSV · HTML | ✓visual |
| GTM Utility | – | YesNot Exportable | – | ✓ |
| Optizent GTM Auditor | Score, via email | – | – |
Based on publicly available information as of early 2026. Some features may have changed, corrections welcome.
Automated auditthis tool
Run instantly against your container export. Applies fixed rules and returns results immediately. Fast and repeatable, but limited to what those rules cover. No understanding of context, business logic, or intent.
Expert audit service
A person reviews your container with knowledge of your business, tracking goals, and implementation history. They prioritize what actually matters, spot patterns no rule can catch, and give recommendations grounded in experience. That takes time and costs money.
Export your GTM container as JSON from GTM under Admin, then Export Container. Upload the file to this tool and you will instantly see unused tags, broken triggers, missing consent configuration, and a full dependency map.
The audit checks for unused tags, paused elements, missing Google Consent Mode V2 configuration, GA4 ecommerce setup, governance issues, and generates a full dependency map showing which triggers and variables each tag depends on.
No. Upload a JSON export from GTM and the tool works entirely in your browser with no account or login required.
Yes. After loading your container you can export the full documentation as CSV, JSON, or a self-contained HTML file with hyperlinks between all elements.