GTM Beautifier

A Chrome Extension that adds custom code-editor themes and a wider, easier-to-read layout to the Google Tag Manager interface.

GTM Beautifier gives the Google Tag Manager web interface the code-editor experience you’re used to elsewhere — without changing anything about how your containers, tags, or triggers actually work.

Pick a theme, not a compromise

Choose from a set of popular code-editor themes — Dracula, Nord, Monokai, Solarized (dark & light), GitHub Dark, Gruvbox, Tokyo Night, One Dark Pro, Night Owl, Material Oceanic, and VS Code (dark & light) — or set it to automatically match your browser’s light/dark mode. Switch instantly from the toolbar popup or the settings page; no reload needed.

A layout built for real screens

Widens the cramped container list, element panels, and code editor views so you can actually use your screen space, and makes paused tags, triggers, and variables easier to spot at a glance.

Nothing to configure, nothing to worry about

Install it, pick a theme, and you’re done. The extension never reads your container content, tag configurations, or variable values — it only changes how the interface looks. Optional, fully anonymous usage analytics can be reviewed and turned off at any time from the settings page; see the Privacy Policy for details.

About the anonymous analytics

GTM Beautifier sends a small number of anonymous events (extension started, theme changed, an error signal if a Google Tag Manager update breaks the styling) — never your container content or any personal data. This is what tells me the extension is still working after Google changes its interface, and which themes are actually worth maintaining. It’s on by default and can be turned off in settings, but leaving it enabled is the biggest single thing you can do to help keep this extension maintained and working.

Why “GTM Beautifier”?

Because Google Tag Manager’s default editor hasn’t changed its look in years, and a few hours spent squinting at code shouldn’t feel like a chore.