Your GTM container, audited in seconds
Upload your Google Tag Manager export and get an instant health score, prioritized issues, consent gaps, and a shareable report — all without creating an account.
Audit Your ContainerInstant Audit
85 rules run client-side across consent, GA4, performance, security, and dead code. Results in under 3 seconds.
Detailed Observations
Every finding includes a priority tier, affected items, and specific context — structured for investigation, not just flagging.
Easy Export
Download a narrative PDF, detailed report, CSV remediation spreadsheet, or machine-readable JSON — your choice.
A complete picture of your container
From overall health to individual tag issues — every layer of your GTM setup, examined.
See your container’s health at a glance
The first thing you see: an overall score from 0–100, a letter grade, and category-level breakdowns across consent, measurement quality, infrastructure, and more. Errors deduct 8 points, optimizations deduct 2 — so you always know where you stand.
Every issue ranked by impact
Findings are sorted by severity — errors first, optimizations second, informational notes last. Filter by category, search by keyword, or browse all 85 rules. Each card shows the issue title, category, affected item count, and a two-line summary.
Context for every finding
Expand any finding to see the full picture: what was detected, which tags are involved, and a specific recommendation you can investigate or hand to a developer. Code evidence is included where relevant.
Know what’s firing — and what’s not covered
See whether a Consent Management Platform is detected, which consent types are configured, and how many tags are covered. DMA readiness, ad_storage, and ad_user_data checks are built in — so consent gaps surface before an audit does.
Export and share with your team
Download a narrative PDF for stakeholders, a detailed report with all evidence, a CSV spreadsheet for ticket-by-ticket remediation, raw JSON for automation, or an MCP server file for AI assistant integration. No login required.
Three steps to a healthier container
From raw JSON export to prioritized action plan — in seconds.
Export
Download your container JSON from Google Tag Manager. Admin → Export Container → choose your workspace.
Upload
Drop the JSON file into TagManifest. Everything runs client-side — your data never leaves your browser.
Review & Fix
Issues ranked by severity — errors first, then optimizations, then informational. Export or share the report with your team.
Common questions
A JSON export of your Google Tag Manager container. In GTM, go to Admin → Export Container → choose your workspace → download. The file is typically named something like GTM-XXXXXX_workspace.json.
Yes. Your container file is parsed and audited entirely in your browser using client-side JavaScript. No data is uploaded to any server. You can verify this in your browser’s network tab — the only requests are for the page assets themselves.
TagManifest currently runs 85 rules across 10 categories: consent management, GA4 configuration, security, performance, dead code, naming conventions, tag quality, ecommerce tracking, ad platform setup, and infrastructure.
Yes. 25 rules are dedicated to GA4: event naming conventions, parameter limits, reserved event names, PII detection in parameters, debug mode left on, measurement ID handling, and ecommerce event validation.
The audit checks for Consent Mode v2 configuration, CMP detection (CookieBot, OneTrust, etc.), consent initialization timing, ad_storage and ad_user_data coverage, and Digital Markets Act (DMA) readiness.
The scanner is free to use with no account required. Upload your container, get your report, and export it — no limits, no paywalls.
Yes. Export as a narrative PDF for stakeholders, a detailed PDF with all evidence for developers, or a CSV spreadsheet with one row per finding for ticket tracking. All exports are generated client-side.
TagManifest works in all modern browsers: Chrome, Firefox, Safari, and Edge. The entire audit runs client-side, so there are no server compatibility concerns.
Ready to audit your container?
No account needed. No data leaves your browser. Just upload and go.
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