Smart Tab Cleaner - Duplicate Detector

Keep your browser organized by automatically detecting and notifying you of duplicate tabs.

Tired of opening the same site five times without realizing it? Smart Tab Cleaner keeps your browser organized automatically. Smart Tab Cleaner runs quietly in the background and watches for duplicate tabs as you browse. The moment you open a page that’s already open elsewhere, you get a clear, non-intrusive alert — so you can fix it before tab clutter takes over. Key features Instant duplicate detection Automatically detects when you open a tab that already exists. Alerts appear only when you’re on the duplicate page, so you’re not interrupted while working elsewhere. Smart notifications Get both an in-page toast and a system notification with quick actions. Dismiss the alert or remove duplicate tabs in one click. Duplicate dashboard Open the popup to see every duplicate grouped by site, with tab counts at a glance. Use Close Others to keep one tab and remove the rest for that site instantly. Inactive tab reminders Set how many days a tab can sit unused (default: 3 days). Smart Tab Cleaner periodically reminds you about stale tabs and lets you close them from the notification. Lightweight & private Built with Manifest V3 and a minimal service worker. Your settings are stored locally on your device — no accounts, no cloud sync, no tracking. Perfect for Power users with dozens of tabs open Developers who revisit the same docs repeatedly Anyone who wants a cleaner, faster browsing workflow How it works Smart Tab Cleaner monitors tab events in the background, compares URLs across open tabs, and alerts you only when it matters. All processing happens locally in your browser. Take control of your tabs. Install Smart Tab Cleaner and browse with less clutter.