What clearing cache does and why you might do it

Cache is temporary data your computer stores to load websites, programs, and files faster the next time you use them. Your browser saves images and page code. Your operating system saves recently used files and search results. Over time, this cache can grow large enough to slow down your computer or cause a program to behave oddly.

Clearing cache does not delete your passwords, saved logins, or files you created. It removes only the temporary copies. After you clear it, websites will load slightly slower the first time you visit them again, because your browser has to read fresh copies instead of using stored versions. Most people notice no difference in daily use.

You might clear cache if a website looks broken, a program is running slowly, you want to free up disk space, or you are troubleshooting a technical problem. You can clear cache on a schedule (monthly or quarterly) or only when you notice an issue.

Key Takeaways

  • Cache is temporary data stored by your browser and operating system to speed up loading; clearing it does not delete your files or passwords.
  • In Windows, you can clear browser cache through your browser's settings menu, or clear system cache through Disk Cleanup or Settings.
  • On Mac, browser cache clears through the browser's preferences, and system cache clears through Storage settings or third-party tools.
  • After clearing cache, websites and programs may load slightly slower on first use, but performance usually improves once new cache builds up.
  • You can set most browsers to clear cache automatically when you close them, so you do not have to do it manually.

Clearing browser cache in Chrome, Firefox, and Edge

Most people accumulate cache in their web browser first, since you visit websites every day. The steps are similar across Chrome, Firefox, and Edge, though the menu names differ slightly.

In Chrome: Click the three-dot menu in the top right corner. Select "Settings," then "Privacy and security," then "Clear browsing data." A window will open. Make sure "Cached images and files" is checked. At the top, choose the time range—"All time" clears everything, or pick "Last hour," "Last 24 hours," "Last 7 days," "Last 4 weeks," or "Last 90 days." Click "Clear data." The process takes a few seconds to a minute depending on how much cache you have.

In Firefox: Click the menu button (three horizontal lines) in the top right. Select "Settings," then "Privacy & Security." Under "Cookies and Site Data," click "Clear Data." Check "Cached Web Content." Click "Clear." You can also use the keyboard shortcut Ctrl+Shift+Delete (Windows) or Command+Shift+Delete (Mac) to open the clear history window directly.

In Edge: Click the three-dot menu in the top right. Select "Settings," then "Privacy, search, and services." Under "Clear browsing data," click "Choose what to clear." Check "Cached images and files." Select your time range and click "Clear now."

Clearing system cache in Windows

Windows stores cache in several places. The easiest method is Disk Cleanup, a built-in tool that finds and removes temporary files safely.

Open File Explorer and right-click your C: drive (or whichever drive holds Windows). Select "Properties." Click "Disk Cleanup." Windows will scan and show you a list of file types it can remove—temporary files, recycle bin contents, and cached data are usually checked by default. Review the list, make sure nothing you need is selected, and click "OK." Windows will delete the files, which usually takes a minute or two.

For a deeper clean, you can also use Storage settings. Open Settings, go to "System," then "Storage." Click "Temporary files." Check the boxes next to the types of temporary data you want to remove—"Temporary files," "Recycle Bin," and "Downloads" are safe choices. Click "Remove files." This method shows you exactly what will be deleted before you confirm.

Clearing system cache on Mac

Mac does not have a built-in cache-clearing tool like Windows Disk Cleanup, but you can clear cache through System Settings or use a third-party utility.

Using System Settings: Open System Settings (the gear icon in the Dock or Applications folder). Click "General," then "Storage." Mac will show you a breakdown of what is using space. Look for "Cache" or "System Data"—the exact name varies by macOS version. You cannot delete these directly from Storage settings, but you can see how much space they occupy. If cache is taking up significant space, restart your Mac, which clears some temporary cache automatically.

Using the Library folder: Open Finder. Press Command+Shift+G to open "Go to Folder." Type ~/Library/Caches and press Enter. This folder contains cache files from your applications. You can browse through it and delete cache folders for specific programs—for example, delete the "Google" folder to clear Chrome cache, or the "Firefox" folder to clear Firefox cache. Be cautious and only delete folders you recognize. Restart your Mac afterward.

Setting your browser to clear cache automatically

Instead of clearing cache manually, you can set your browser to clear it every time you close it. This keeps cache from building up in the first place.

In Chrome: Open Settings, go to "Privacy and security," then "Clear browsing data." Toggle on "Clear cookies and other site data when you quit Chrome." From now on, cache and cookies will delete automatically when you close the browser completely.

In Firefox: Open Settings, go to "Privacy & Security." Under "Cookies and Site Data," check "Delete cookies and site data when Firefox is closed." You can also click "Manage Exceptions" to keep cookies for specific websites you want to stay logged into.

In Edge: Open Settings, go to "Privacy, search, and services." Toggle on "Clear browsing data" under "Clear browsing data." Choose whether to clear data when you close the browser or on a schedule you set.

What to do if clearing cache does not fix your problem

If a website still looks broken or a program still runs slowly after clearing cache, the issue is likely something else. Try these next steps.

Restart your computer. Many temporary problems—slow performance, frozen programs, websites not loading—clear up after a restart because it stops background processes and resets memory. Wait 30 seconds after shutdown before turning it back on.

If a specific website is the problem, try opening it in a different browser. If it works in another browser, the issue is browser-specific, not your computer. Try clearing that browser's cache again, or disable browser extensions (add-ons) one at a time to see if one is causing the problem.

If your entire computer is slow, clearing cache alone may not help. Check how much free disk space you have—if you have less than 10% of your drive free, that slows down performance. You may need to delete large files, uninstall unused programs, or move files to external storage.

Frequently Asked Questions

Will clearing cache delete my passwords or saved logins?

No. Cache and cookies are different. Cache is images and code. Cookies store login information. When you clear cache, you can choose whether to also clear cookies—they are separate checkboxes. If you uncheck "Cookies and other site data," your saved logins stay.

How often should I clear cache?

There is no set schedule. If you set your browser to clear cache automatically when you close it, you do not need to do anything. If you clear manually, once a month or once a quarter is reasonable. Clear it sooner if a website looks broken or your computer feels slow.

Is it safe to delete everything in the Caches folder on Mac?

It is mostly safe, but deleting the entire folder can cause problems. Instead, delete specific process cache folders you recognize, or restart your Mac to let it clean up automatically. If you delete cache for a system process by mistake, restart your Mac and it will rebuild.

Why is my browser still slow after clearing cache?

Cache is only one reason browsers slow down. Browser extensions, too many open tabs, or a slow internet connection are common causes. Try disabling extensions one at a time to find the culprit, or close unused tabs. If the problem is your internet, clearing cache will not help.

Can I clear cache for just one website instead of all websites?

In Chrome and Firefox, yes. In Chrome, go to Settings, "Privacy and security," "Cookies and other site data," then search for the website name and click the trash icon next to it. In Firefox, go to Settings, "Privacy & Security," "Manage Data," find the site, and click "Remove Selected." Edge does not have a per-site option.