High CPU use in Chrome is usually caused by one busy tab, extension, video, ad-heavy page, or background process. The fastest fix is to identify the specific item instead of closing every tab and hoping the fan quiets down.
Does this affect you?
Use this for Google Chrome on Windows or Mac when the computer gets hot, the fan spins up, Task Manager or Activity Monitor blames Chrome, or Chrome uses a lot of processor power while you are not doing much. Edge and other Chromium browsers have similar tools.
Find the exact tab or extension using Chrome Task Manager
Chrome Task Manager breaks usage down by tab, extension, and internal browser process.
- Click the three-dot menu in the top-right corner of Chrome.
- Open More tools > Task Manager.
- Click the CPU column to sort from highest use to lowest.
- Select the tab, extension, or process at the top if it is clearly the problem.
- Click End process to close only that item.
- Watch CPU use for a few seconds to confirm it drops.
You can also press Shift+Esc on Windows while Chrome is active to open Chrome Task Manager directly. On Mac, use the menu path because Chrome does not provide the same default shortcut there.
Turn off graphics acceleration or disable a heavy extension
Use this when Task Manager repeatedly points to rendering work or the same extension.
- Open Chrome Settings.
- Choose System.
- Turn off Use graphics acceleration when available.
- Click Relaunch and test CPU use again.
- If an extension was the culprit, open chrome://extensions and turn it off or remove it.
If disabling graphics acceleration makes CPU use worse, turn it back on. Some newer systems perform better when Chrome can use the graphics hardware.
Reset Chrome to default settings
Use reset only after tab and extension checks, especially when high CPU happens across many unrelated websites.
- Open Chrome Settings.
- Choose Reset settings.
- Click Restore settings to their original defaults.
- Confirm Reset settings.
- Restart Chrome and test with only a few tabs open.
More control
Compare other browsers
Firefox has about:performance for tab and extension impact. Edge uses a Chromium-style browser task manager, often available from its menu or Shift+Esc. Safari does not have the same browser task manager, so use macOS Activity Monitor and look for Safari Web Content processes.
Recognize heavy websites
If the same site spikes CPU every time, Chrome may not be the root problem. Auto-playing video, complex dashboards, live maps, and ad-heavy pages can be expensive. A lighter version of the site, reader mode where available, or fewer active media tabs may help more than resetting Chrome.
Sources
- Google Chrome Help – Fix a webpage that is frozen, unresponsive, or missing (2025)
- Google Chrome Help – Manage extensions in Chrome (2025)
- Chromium Project – Task Manager documentation (2025)