What cookies and cache do, and why you might want to clear them

Cookies are small files that websites store on your computer to remember information about you — your login details, items in a shopping cart, or your preferences. Cache is a folder where your browser stores copies of web pages, images, and files you've visited so they load faster next time. Both are useful, but they also take up space and can slow your browser down if they build up over months or years.

Clearing them regularly can speed up your browser, free up disk space, and remove records of sites you've visited. If a website isn't loading correctly, clearing cache often fixes it because your browser will fetch a fresh copy instead of using an outdated stored version. You might also clear them before selling or giving away your computer, or if you're concerned about privacy.

The steps differ depending on which browser you use — Chrome, Firefox, Safari, or Edge — and whether you're on Windows or Mac. The process takes two to five minutes and is safe to do at any time.

Key Takeaways

  • Cache stores copies of web pages to make them load faster; cookies store login information and preferences — both can be cleared without breaking websites.
  • In Chrome, Firefox, Edge, and Safari, you access the clear cache option through the Settings or Preferences menu under Privacy or History.
  • You can choose to clear cache and cookies from the last hour, day, week, or all time — "all time" removes the most data but takes longer to process.
  • After clearing cache, websites may load slightly slower the first time you visit them because your browser has to read fresh copies of files.
  • You can set your browser to automatically clear cache and cookies every time you close it, so you don't have to do it manually.

Clearing cache and cookies in Google Chrome

Open Chrome and click the three vertical dots in the top right corner. Select Settings from the menu. On the left side, click Privacy and security, then click Clear browsing data.

A window will pop up with options. At the top, use the dropdown menu to choose the time range: All time clears everything, while Last hour, Last 24 hours, Last 7 days, and Last 4 weeks let you be more selective. Make sure the boxes next to Cookies and other site data and Cached images and files are checked. Click Clear data. The process usually takes 10 to 30 seconds.

Clearing cache and cookies in Mozilla Firefox

Open Firefox and click the three horizontal lines (hamburger menu) in the top right corner. Select Settings. On the left, click Privacy & Security. Scroll down to the Cookies and Site Data section and click Clear Data.

A window appears with two checkboxes: Cookies and Site Data and Cached Web Content. Make sure both are checked. Firefox clears data from all time by default, but you can click the dropdown next to "Clear" to choose a specific time range if you prefer. Click Clear to finish.

Clearing cache and cookies in Microsoft Edge

Open Edge and click the three dots in the top right corner. Select Settings. On the left, click Privacy, search, and services. Under Clear browsing data, click Choose what to clear.

A window opens with a time range dropdown at the top — select All time to clear everything, or choose a shorter period. Check the boxes for Cookies and other site data and Cached images and files. Click Clear now. You can also turn on Clear browsing data at the top of this section to make Edge automatically clear these items every time you close the browser.

Clearing cache and cookies in Safari (Mac only)

Open Safari and click Safari in the menu bar at the top of the screen. Select Settings (or Preferences on older versions). Click the Privacy tab. Click Manage Website Data to see all stored cookies and cache.

To remove everything, click Remove All. To remove specific sites, select them from the list and click Remove. If you want to clear cache but keep cookies (or vice versa), close this window and instead click History in the menu bar, then select Clear History and choose your time range — this clears cache but not cookies. Safari doesn't have a single "clear both" button like other browsers.

Setting your browser to clear cache automatically

Most browsers can clear cache and cookies automatically when you close them, so you don't have to do it manually. In Chrome, go to Settings > Privacy and security, scroll to Clear browsing data, and turn on Clear cookies and site data when you quit Chrome. In Firefox, go to Settings > Privacy & Security, scroll to Cookies and Site Data, and check Delete cookies and site data when Firefox is closed.

In Edge, go to Settings > Privacy, search, and services, and toggle on Clear browsing data under the section that says "Clear browsing data". In Safari, go to Settings > Privacy and check Remove all website data when quitting Safari. Once enabled, your browser will handle the cleanup for you.

What happens after you clear cache and cookies

After clearing, you'll notice that websites load slightly slower the first time you visit them because your browser has to read fresh copies of images and files instead of using stored versions. This slowdown is temporary — once your browser rebuilds the cache, sites will load at normal speed again. You'll also be logged out of most websites, so you'll need to sign back in the next time you visit them.

If you cleared cookies from a site you use frequently, you may lose saved preferences like language settings or theme choices. These will be restored the next time you visit and adjust your settings again. None of this causes any damage to your computer or the websites themselves — clearing cache and cookies is completely safe and reversible.

Frequently Asked Questions

Will clearing cache and cookies delete my passwords?

No. Passwords stored in your browser's password manager are separate from cookies and cache. If you want to delete saved passwords, you have to do that separately through your browser's password settings. Clearing cache and cookies alone will not affect them.

How often should I clear my cache and cookies?

There's no set schedule. If your browser feels slow or websites aren't loading correctly, clearing cache often fixes it. If you're concerned about privacy, clearing them weekly or monthly is reasonable. For most people, letting the browser do it automatically when you close it is the easiest approach.

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

Yes. In Chrome, Firefox, and Edge, you can right-click on a website and select "Delete" or similar options to remove just that site's data. In Safari, use the "Manage Website Data" window to select individual sites. This is useful if one site is misbehaving but you want to keep cache from others.

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

Browsing history is the list of websites you've visited — clearing it removes that list. Cache is the stored files that make sites load faster. Cookies are login information and preferences. You can clear any of these separately, though most browsers let you clear all three at once.

Will clearing cache free up a lot of disk space?

It depends on how long it's been since you last cleared. If you've never cleared cache, it might be several gigabytes. If you clear regularly, each clearing might only free up a few hundred megabytes. Check your browser's storage settings to see how much space cache is currently using before you clear it.