A tab suspender that uses Chrome's own sleep
Put one tab or a whole window to sleep from the Session Manager. Chrome frees the memory, every tab keeps its address and its place, and a click wakes it.
Get it for $49
How tab sleep works
Sleep lives on the Session Manager board, next to your live windows.
Sleep one tab
Hover a tab and press the moon. Its memory goes back to Chrome.
Or the whole window
The moon on a window puts every tab to sleep except its active one.
Click to wake
A sleeping tab reloads the moment you open it, right where it was.
Memory Saver does the automatic part
Memory Saver is built into Chrome and puts idle tabs to sleep on its own. Turn it on. UtilEngine adds the manual half, and one place to see it all.
| Chrome Memory Saver |  UtilEngine | |
|---|---|---|
| When tabs sleep | Chrome Memory SaverOn its own, after a tab sits unused | UtilEngineWhen you choose |
| Sleep a tab by hand | Chrome Memory SaverNot from Chrome's own menus | UtilEngineOne tab, or a whole window at once |
| Which tabs | Chrome Memory SaverOnes Chrome picks, skipping audio, pinned tabs and half-filled forms | UtilEngineAny tab except a window's active one |
| Exceptions | Chrome Memory SaverA list of sites to always keep active | UtilEngineNothing sleeps until you ask |
| Where you see it | Chrome Memory SaverAn optional ring around the tab's icon | UtilEngineA moon on the Session Manager board, Chrome's sleeping tabs included |
| Price | Chrome Memory SaverBuilt into Chrome | UtilEnginePart of UtilEngine, $49 once |
Memory Saver is under Settings, then Performance, at chrome://settings/performance. Our guide to reducing Chrome's memory use walks through its settings.
Real tabs, not placeholder pages
Older suspenders replaced each tab with a page of their own and tucked the real address inside it. When The Great Suspender was pulled from the Chrome Web Store as malware in 2021, the tabs it had suspended went with it.
UtilEngine asks Chrome to discard the tab instead, the same way Memory Saver does. The tab keeps its real address, its title and its spot in the window, and it doesn't need UtilEngine to come back. More on The Great Suspender.
Tab sleep, answered
Does UtilEngine suspend tabs automatically?
No, and that's on purpose. Chrome's Memory Saver already puts idle tabs to sleep on its own. UtilEngine adds sleep on demand, for one tab or a whole window, and shows every sleeping tab on one board, including the ones Memory Saver put to sleep.
What is the difference between a tab suspender and Memory Saver?
Both free the memory a tab is using while keeping it open. Memory Saver is built into Chrome and decides on its own when a tab has sat unused long enough. A tab suspender is an extension you control by hand. Older suspenders swapped the page for their own placeholder. UtilEngine uses Chrome's own discard instead, the same mechanism Memory Saver uses.
Do sleeping tabs lose anything?
The page reloads when it wakes, so unsaved form input may be lost. The tab itself, its address, and its spot in the window all stay. The active tab of a window never sleeps.
What happens to sleeping tabs if I remove UtilEngine?
Nothing. A sleeping tab is a normal Chrome tab with its real address, so there is no placeholder page and nothing that depends on the extension.
Do saved sessions remember which tabs were asleep?
No. A saved session keeps each tab, its order, and whether it was pinned. When you restore it, the tabs open awake.
Does tab sleep need extra permissions?
No. It uses the tab access UtilEngine already has for sessions and tab search.
Which browsers does it work in?
Chrome, Brave, Edge, and other Chromium browsers. Firefox support is on the roadmap.
Sleep tabs, keep your place
Tab sleep, sessions, hourly snapshots, and 50+ commands.
Get it for $49One-time payment. 14-day refund, no questions asked.
