Know Which Tab Slows Chrome - Monitor tab resource usage and clean up heavy tabs.
Users
3
+1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#339K
#264K among extensions
Version
1.1.0
updated 4 Feb 2026
Users
monthly, 8 months
Latest, 17 Oct 2026:3 usersMove the mouse over the chart for any month
Ratings count
monthly, 8 months
Latest, 17 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About TabCost
TabCost helps you find the tabs that slow Chrome down — fast.
See which tabs are using the most memory, which ones are “busy”, and hibernate idle tabs to keep your browser smooth.
Why you’ll love it
Instant visibility: See per-tab memory (JS heap) + an activity estimate
Find offenders quickly: Filter All / Heavy / Idle 10m+
Search tabs: Find any tab by title or URL
One-click cleanup: Hibernate (discard) idle tabs to free resources
Keyboard friendly:
↑ / ↓ to navigate
Enter to hibernate selected
Esc to clear
Ctrl/Cmd + K to search
How it works
TabCost measures performance signals locally in your browser.
Some restricted pages (like chrome:// or system pages) don’t allow measurement—those tabs may show unavailable metrics.
Privacy first
No tracking
No analytics
No data collection
No servers — everything runs on-device
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