Preview GTM dataLayer, debug with GTM inject, and fix Shopify Custom Pixel preview issues.
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LeoMeasure DataLayer Checker is a powerful Chrome Extension for GTM dataLayer preview real time. It helps you preview and debug dataLayer events and data without relying on GTM’s built-in preview mode or the browser console for Shopify Custom Pixel.
Key Features:
DataLayer Checker: Easily preview and debug the dataLayer on any website — even when GTM's native preview mode is not available.
Copy DataLayer Path: Instantly copy the path of any object inside the dataLayer to create GTM variables quickly and accurately in Google Tag Manager.
DataLayer Checker for Shopify Custom Pixel: Shopify Custom Pixel events don’t appear in GTM preview mode by default. This extension lets you view those dataLayer events directly, without opening the browser console.
Simulate GTM Preview for Shopify: Enable GTM-like preview behavior for Shopify Custom Pixel integrations with a single toggle.
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LeoMeasure – DataLayer Checker & GTM Inspector is an incredibly useful extension. I highly recommend it to anyone working with Google Tag Manager or managing complex tracking setups.
Excellent extension! It seamlessly supports all types of data layers, making tag implementation and debugging much easier. Highly recommended for anyone working with Google Tag Manager or advanced tracking setups.
Awsome Chrome Extension
It does what exactly I wanted! Great work LeoMeasure!
Thank you so much bhai, appreciate it
LeoMeasure - DataLayer Checker & GTM Inspector has quickly become an essential part of my workflow as a web analyst. It does exactly what you'd hope for—providing real-time, crystal-clear visibility into the dataLayer—but it goes beyond that by solving pain points that other tools simply miss. What really sets LeoMeasure apart is how effortlessly it handles complex environments like Shopify’s sandboxed dataLayer, which is notoriously tricky to inspect. With this extension, you can finally validate events and parameters without digging through the console or guessing what’s firing when. The user interface is clean, fast, and intuitive—ideal for both deep debugging sessions and quick QA checks. Whether you're just starting with GTM or you're managing enterprise-level tracking setups, this tool saves time, reduces errors, and gives you confidence in your implementation. Hats off to the LeoMeasure team for building something this thoughtful, efficient, and genuinely helpful. Highly recommended for anyone serious about data accuracy and technical analytics.
"LeoMeasure - DataLayer Checker & GTM Inspector" is a powerful and reliable tool for web analysts, marketers, and developers working with Google Tag Manager and eCommerce platforms like Shopify. It offers a clear and real-time visualization of the dataLayer, making it significantly easier to validate events, parameters, and tracking setups without relying on the browser console. One of the key strengths of this extension is its ability to accurately display Shopify’s sandboxed dataLayer, which is often hidden from standard tools. The intuitive interface enhances productivity and helps streamline the debugging process, making it suitable for both beginners and seasoned professionals in the analytics space. Overall, this is one of the most practical, time-saving, and insightful tools in my data stack. Huge respect to the LeoMeasure team for building a tool that truly understands the needs of web analysts and marketers. — Nazmul Islam, GA4 & GTM Specialist