What cache is and why websites store it

Cache is a folder on your computer where your browser automatically saves pictures, videos, and other files from websites you visit. The next time you go to that same website, your browser loads those saved files instead of downloading them again — which makes the page load faster.

The problem is that cache also stores a record of where you've been. If someone else uses your computer, they can see a list of websites you visited by looking at your browser history and cache files. Websites can also recognize you when you return because they remember information about your previous visits.

Clearing your cache regularly removes this record and makes it harder for websites to track your browsing. It also frees up storage space on your computer, since cache files can add up to hundreds of megabytes over time.

Key Takeaways

  • Cache is a storage folder where your browser saves website files to make pages load faster, but it also records where you've been.
  • Clearing cache removes the record of your visits and prevents websites from recognizing you on return visits.
  • The steps to clear cache are different for each browser — Chrome, Firefox, Safari, and Edge each have their own menu location.
  • You can set your browser to clear cache automatically every time you close it, so you don't have to do it manually.
  • Clearing cache will log you out of most websites, so you'll need to sign back in after you clear it.

How to clear cache in Google Chrome

Open Chrome and look at the top right corner. Click the three vertical dots (called the menu button) and select "Settings" from the dropdown. On the left side of the screen, click "Privacy and security," then click "Clear browsing data."

A window will pop up. Make sure the box next to "Cached images and files" is checked. You can also check "Cookies and other site data" if you want to remove login information and tracking cookies. At the top of the window, use the dropdown that says "All time" if you want to delete everything, or pick a shorter time period like "Last 24 hours" or "Last 7 days." Then click "Clear data."

How to clear cache in Mozilla Firefox

Open Firefox and click the three horizontal lines (the menu button) in the top right corner. Select "Settings," then click "Privacy & Security" on the left side. Under the section labeled "Cookies and Site Data," click the button that says "Clear Data."

A window will appear. Make sure "Cached Web Content" is checked. You can also check "Cookies and Site Data" to remove login information. Click "Clear" to delete the cache. If you want to delete cache from only a specific time period, use the keyboard shortcut Ctrl+Shift+Delete (or Cmd+Shift+Delete on Mac) instead, which opens a more detailed menu.

How to clear cache in Safari and Microsoft Edge

In Safari on Mac, click "Safari" in the top menu bar and select "Settings." Click the "Privacy" tab, then click "Manage Website Data." Select the websites you want to remove from the list, or click "Remove All" to clear everything. Then click "Remove Now."

In Microsoft Edge, click the three dots in the top right corner and select "Settings." Click "Privacy, search, and services" on the left. Under "Clear browsing data," click "Choose what to clear." Check the box next to "Cached images and files" and select your time range, then click "Clear now."

Set your browser to clear cache automatically

Instead of clearing cache manually each time, you can tell your browser to delete it automatically whenever you close the program. In Chrome, go to Settings > Privacy and security, then turn on the toggle next to "Clear cookies and site data when you quit Chrome." In Firefox, go to Settings > Privacy & Security, scroll to "Cookies and Site Data," and check the box that says "Delete cookies and site data when Firefox is closed."

In Safari, click Safari > Settings > Privacy, then use the dropdown next to "Remove history" and select "after one day" or "weekly" — Safari doesn't have a "on close" option, but these intervals work similarly. In Edge, go to Settings > Privacy > Clear browsing data and turn on "Choose what to clear every time you close the browser," then select "Cached images and files."

What happens when you clear cache

When you clear cache, you will be logged out of most websites. The next time you visit Facebook, Gmail, your bank, or any other site where you have an account, you'll need to enter your username and password again. This is normal and expected.

Websites may also load slightly slower the first time you visit them after clearing cache, because your browser has to read all the images and files again instead of using the saved copies. After that first visit, the cache will rebuild and pages will load at normal speed again.

Clearing cache does not delete your browser history — that's a separate record. If you want to remove the list of websites you've visited, you need to clear your history separately using the same menu where you clear cache.

The difference between cache and cookies

Cache stores website files like images and videos. Cookies are small text files that websites use to remember information about you — like your login status, your shopping cart, or your preferences. They're related but separate things.

When you clear cache, you're removing the files. When you clear cookies, you're removing the tracking information. Most people should clear both, which is why the "Clear browsing data" menu in every browser lets you check both boxes at once. Some people clear cache frequently but leave cookies alone if they want to stay logged into their accounts, though this is less private.

Frequently Asked Questions

Will clearing cache delete my passwords?

No. Passwords are stored separately in your browser's password manager, not in cache. If you want to delete saved passwords, you have to do that in a different menu. In Chrome and Edge, go to Settings > Passwords. In Firefox, go to Settings > Privacy & Security > Logins and Passwords. In Safari, go to Settings > Passwords.

Does clearing cache make my computer faster?

Clearing very old cache can free up a few hundred megabytes of storage space, which might help if your hard drive is almost full. For most people, the speed difference is not noticeable. The main reason to clear cache is privacy, not performance.

Can I clear cache for just one website instead of everything?

Yes. In Chrome, Firefox, and Edge, you can right-click on any website and select "Delete" or "Remove" from the cache menu. In Safari, go to Privacy > Manage Website Data, find the site in the list, and click "Remove." This is useful if one website is acting slow but you want to keep cache from other sites.

What if I clear cache and a website still remembers me?

Some websites use methods other than cache and cookies to track you, like fingerprinting (collecting information about your device and browser). Clearing cache won't stop that. If you want stronger privacy, use your browser's private or incognito mode, which doesn't save cache or cookies at all during that session.

Do I need to clear cache on my phone too?

Yes. Phone browsers like Chrome Mobile, Safari on iPhone, and Firefox Mobile all store cache the same way desktop browsers do. The steps are similar: open Settings, find the browser app, and look for "Clear cache" or "Clear browsing data." Check your specific browser's help page for exact steps, since phone menus vary.