Datalayer Lens

Monitor Google Tag Manager dataLayer events in real-time. Essential for analytics developers, QA engineers, and GTM implementers.

DataLayer Lens is a powerful debugging tool for anyone working with Google Tag Manager and dataLayer implementations. Monitor, inspect, and validate your dataLayer pushes in real-time as you interact with any website.

Key Features
• Real-time event monitoring. Watch dataLayer events appear instantly as they're pushed, with clear visual indicators for new activity.
• Multiple viewing modes. Choose between an on-page overlay, a persistent side panel, or integration with Chrome DevTools to suit your workflow.
• Smart event categorisation. Events are automatically colour-coded by type (page views, clicks, e-commerce transactions, form submissions, and more) for quick, visual scanning.
• Flexible filtering. Include or exclude specific event types to focus on what matters. Filter out noisy GTM lifecycle events or isolate specific interactions.
• Event grouping. Group related events by time window or trigger events to understand the sequence of dataLayer activity.
• Event persistence. Optionally retain events across page refreshes, ideal for testing multi-step funnels and form submissions.
• Multiple dataLayer support. Monitor custom dataLayer array names alongside the standard dataLayer.
• Data export. Export captured events as JSON for documentation, debugging, or sharing with colleagues.
• Per-domain configuration. Save different settings for different websites.

Who is this for?
• Google Tag Manager developers validating implementations
• Analytics engineers debugging tracking issues
• QA teams verifying analytics requirements
• Digital marketers auditing tag firing behaviour
• Developers integrating analytics into web applications

Privacy
DataLayer Lens operates entirely within your browser. No data is collected, transmitted, or stored externally. All captured events remain local to your machine.