GTM Checker

Purpose & audience: This tool validates Google Tag Manager deployments, focusing on container structure, data layer presence, tag firing logic, and GA4 integration. It targets marketers, developers, and analytics teams during onboarding or after site changes to ensure data collection is accurate and consistent across pages.
Conceptual operation: It accepts a publicly accessible URL or a GTM container snippet, parses configuration, and performs data-layer schema checks, tag firing validation, and GA4 property linkage verification. The tool computes a health score, enumerates issues by severity, and provides concrete remediation steps with exportable outputs.
Value proposition and differentiators: The tool emphasizes domain-specific checks, severity-based issue lists, exportable reports, and remediation guidance. Its focus on data layer integrity and cross-page validation helps reduce analytics discrepancies compared with generic validators, supporting governance, QA, and privacy audits.
Core features and use cases: container validation, data layer validation, GA4 integration checks, per-page and site-wide scope analysis, issue severity tagging, remediation guidance, and exportable JSON/CSV reports for stakeholders. Typical use cases include QA testing before deployment, privacy compliance reviews, and analytics readiness verification.