Simple Data Layer Viewer

Visualize data layers on any website.

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 > Data layer history: track how the data layer evolves across the full session > Console logging: stream data layer changes directly to the browser console > Supports common data layer formats out of the box (dataLayer, digitalData, utag.data, etc.) > Fully customizable: define your own data layer names, tweak appearance, and choose between light and dark mode > Inject code to activate debugging mode or initialize a custom data layer > Rewrite requests to load development environments or block domains for testing 🚫 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.