Simple Data Layer Viewer by datapip

View and monitor data layers like dataLayer, digitalData, and utag.data. Use a popup or DevTools panel with live updates. Fully local, customizable, and built to support your daily debugging workflow. No hidden tracking or data collection.

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You'll need Firefox to use this extension

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About this extension

The Simple Data Layer Viewer is a lightweight, no-nonsense extension for inspecting data layers on any website.

🔍 Features:

Instantly view detected data layers via a popup or a dedicated Developer Tools panel
Live updates: the DevTools panel refreshes automatically as the data layer changes
Supports common data layer formats out of the box (dataLayer, digitalData, utag.data, etc.)
Fully customizable: define your own data layer names and tweak appearance settings
Easily inject JavaScript code to any website for testing and debugging purposes

🚫 No tracking. No data collection. No external communication.
This extension is purely local and transparent—it simply displays data layers.

Whether you're debugging, analyzing, or just exploring, this tool is designed to support your daily work—just like it does mine.

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Release notes for 3.1.0

The new default setting in the Dev Tools is that the data layer is overwritten on updates. Previously, a history of the data layer was created when changes were detected. This behavior can be changed in the settings.

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