Aleattorium Independent studio · Est. 2026
TOOL-001 Chrome Extension Public Alpha

ATO — Advanced Tab Organizer

Kill duplicate tabs instantly. Stay focused.

A lightweight Chrome extension that detects duplicate tabs, shows a badge counter, and lets you close duplicates with one click or a keyboard shortcut.

Add to Chrome → View source → Manual install
Metadata Catalog entry
ID
TOOL-001
Type
Chrome Extension
Status
Public Alpha
Distribution
Chrome Web Store
License
MIT
Source
github.com/jeanlucaslima/ato
Functions 5 on file
New Close matching tabs
Search open tabs and close every matching result in one action.
Badge counter
Shows how many duplicate tabs you have.
One-click cleanup
Close all duplicates with one button.
Keyboard shortcut
Open with Cmd+U (macOS) or Ctrl+U (Windows/Linux).
Real-time updates
The badge updates automatically as you browse.
Distribution Chrome Web Store

Now on the Chrome Web Store.

Install in one click — no Developer Mode required. You can still clone and build from source if you prefer; see the manual install steps below.

Add to Chrome →

Privacy Review source

Tab access only.

ATO needs access to browser tabs so it can detect duplicates and update the badge counter. Review the source before installing.

Privacy policy →

Latest build note All notes →

Installation

The easiest way to install ATO is from the Chrome Web Store — one click, no Developer Mode. The steps below are for building from source instead.

1. Clone and build

git clone https://github.com/jeanlucaslima/ato.git
cd ato
npm install
npm run icons
npm run build

2. Load in Chrome

  1. Open chrome://extensions
  2. Enable Developer mode using the toggle in the top right
  3. Click Load unpacked
  4. Select the built extension folder (typically dist/)

3. Use it

  • Press Cmd+U / Ctrl+U to open the popup
  • Or click the ATO icon in your toolbar
  • Click Close duplicates to remove duplicate tabs

Development

# Watch mode
npm run dev

# Run tests
npm test

# Build for production
npm run build

After changes, reload the extension from chrome://extensions.