What cache is and why you might want to clear it

Cache is temporary data your computer stores to make things faster. When you visit a website, your browser saves images, scripts, and page layouts so the next time you visit, it doesn't have to download everything again. Your operating system does the same thing — Windows keeps copies of recently used files, thumbnails, and temporary data to speed up searches and file previews.

Over time, cache builds up and takes up disk space. Clearing it won't break anything — your computer will just rebuild the cache as you use it. Most people clear cache to free up storage, troubleshoot a website that looks wrong, or remove data from sites they've visited. You don't need to clear cache regularly unless you're running low on space or you want to remove your browsing history.

Key Takeaways

  • Browser cache lives in your browser settings, not in Windows, and each browser stores it in a different location.
  • Clearing browser cache removes saved website data but does not sign you out of most accounts unless you also clear cookies.
  • Windows has its own temporary files and system cache that you can clear separately through Settings or Disk Cleanup.
  • The fastest way to clear everything at once is to use Disk Cleanup, which removes browser cache, Windows temp files, and recycle bin contents in one step.

Clear cache in Chrome, Edge, or Firefox

Each browser stores cache in its own location, so you need to clear it separately for each one you use. The steps are similar across all three, but the menu names differ slightly.

In Chrome: Open Chrome and press Ctrl+Shift+Delete (or Cmd+Shift+Delete on Mac). A window titled "Clear browsing data" opens. At the top, set the time range to "All time" if you want to clear everything, or pick a specific range. Make sure "Cached images and files" is checked. Click "Clear data." Chrome will clear the cache and close the window.

In Edge: Open Edge and press Ctrl+Shift+Delete. The "Clear browsing data" window opens. Set the time range, check "Cached images and files," and click "Clear now." Edge works the same way as Chrome because both use the same engine.

In Firefox: Open Firefox and press Ctrl+Shift+Delete (or Cmd+Shift+Delete on Mac). The "Clear Recent History" window opens. Set the time range to "Everything" if you want to clear all cache. Under "Details," make sure "Cache" is checked. Click "Clear Now." Firefox calls it "Cache" instead of "Cached images and files," but it's the same thing.

Clear Windows temporary files and system cache

Windows stores temporary files separately from browser cache. These include installation files, update remnants, and system thumbnails. The easiest way to clear them is through Disk Cleanup, a built-in Windows tool.

Open the Start menu and type "Disk Cleanup." Click the Disk Cleanup app. A window will ask you to pick a drive — select C: (or whichever drive Windows is installed on). Disk Cleanup will scan for temporary files and show you a list of what it found. Check the boxes next to "Temporary files," "Recycle Bin," and "Temporary Internet Files" (this is Windows cache of websites you've visited). Click "Delete Files" and confirm. Windows will remove the selected items.

If Disk Cleanup doesn't show much to delete, you can also go to Settings > System > Storage > Temporary files and click "Remove files." This does the same thing but shows you the exact size of what will be deleted before you confirm.

Clear cache without signing out of accounts

When you clear browser cache, you remove stored website data, but you usually stay signed into your accounts. Cache and cookies are different — cache is images and scripts, cookies are login tokens and preferences. Most browsers let you clear one without the other.

In Chrome, Edge, or Firefox, when you open the "Clear browsing data" window, you'll see checkboxes for different data types. If you uncheck "Cookies and other site data" and only check "Cached images and files," you'll clear the cache but stay signed in. This is useful if a website looks broken and you want to force it to reload without losing your login.

If you do want to clear cookies too (which will sign you out), leave that checkbox checked. You'll have to sign back in to your accounts, but it's a more thorough way to remove your browsing history from a site.

When to clear cache and when not to

Clear cache if your hard drive is running low on space, if a website looks wrong or loads slowly, or if you want to remove traces of sites you've visited. Cache is safe to delete — it's just temporary data that your computer rebuilds as you use it.

You don't need to clear cache on a schedule. Some people clear it weekly or monthly out of habit, but unless you're short on storage or troubleshooting a problem, there's no reason to. Cache actually helps your computer run faster, so clearing it too often can slow things down slightly until the cache rebuilds.

One exception: if you're on a shared computer and you want to remove your browsing history before someone else uses it, clear both cache and cookies. Cache alone doesn't contain much identifying information, but cookies can show which sites you've visited and sometimes store login tokens.

Clearing cache on an external drive or USB stick

If you use a portable drive or USB stick to move files between computers, you might want to clear cache from it too. Plug the drive into your computer, open File Explorer, and look for a folder called ".cache" or "Temp." These are usually hidden, so you may need to show hidden files first.

In File Explorer, go to View > Show > Hidden items (in Windows 11) or View > Options > View > Show hidden files, folders, and drives (in Windows 10). Once hidden files are visible, you can find and delete the cache folders. Be careful not to delete anything else — only remove folders clearly labeled as cache or temp.

Frequently Asked Questions

Will clearing cache delete my passwords?

No. Passwords are stored separately from cache, usually in your browser's password manager or in Windows Credential Manager. Clearing cache removes only temporary website data. If you want to remove saved passwords, you have to do that separately in your browser settings under "Passwords."

How much space does cache usually take up?

It varies widely depending on how much you browse. Browser cache is often between 100 MB and 1 GB per browser. Windows temporary files can be several GB if you've installed many updates. Disk Cleanup will show you the exact size before you delete anything.

Can I clear cache while using the browser?

Yes. You can clear cache in Chrome, Edge, or Firefox while the browser is open. The browser will close any cached data and rebuild it as you visit new sites. You don't need to restart your computer.

What's the difference between clearing cache and clearing history?

History is a list of websites you've visited that you can see in your browser. Cache is the temporary files those websites left behind. Clearing history removes the list; clearing cache removes the files. Most browsers let you clear one without the other.

Do I need to clear cache on my phone too?

The same logic applies — cache takes up space and can sometimes cause websites to load incorrectly. On Android, go to Settings > Apps > [browser name] > Storage > Clear Cache. On iPhone, go to Settings > [browser name] > Clear History and Website Data. The steps are similar but the menus are different.