What cache and cookies actually do
Cache is a folder on your computer where your browser stores copies of web pages, images, and files you've visited. When you return to a site, your browser loads these stored copies instead of downloading everything again — which makes pages load faster. Cookies are small text files that websites place on your device to remember things about you: your login status, items in your shopping cart, your language preference, or sites you've visited.
Both serve a real purpose. Cache speeds up browsing. Cookies let you stay logged into Gmail without typing your password every time. But they also accumulate over time, take up disk space, and can track your activity across sites. Clearing them periodically is a straightforward way to free up space and reset your browsing state.
Key Takeaways
- Cache stores web pages and images to make sites load faster; cookies remember your logins and preferences across visits.
- Clearing cache frees up disk space and removes old stored data, but may slow down frequently visited sites temporarily.
- Clearing cookies logs you out of most websites and removes tracking data, but you can choose to keep login information if your browser offers that option.
- The process takes under a minute and is found in your browser's settings under "Privacy," "History," or "Clear Browsing Data."
- You can set your browser to clear cache and cookies automatically when you close it, or do it manually whenever you choose.
How to clear cache and cookies in Chrome
Open Chrome and click the three vertical dots in the top right corner. Select Settings, then click Privacy and security in the left sidebar. Choose Clear browsing data.
A window will appear with checkboxes. Make sure Cookies and other site data and Cached images and files are both checked. At the top, use the dropdown menu to select the time range — All time clears everything, or you can choose Last hour, Last 24 hours, Last 7 days, Last 4 weeks, or Last 3 months. Click Clear data when you're ready.
How to clear cache and cookies in Firefox
Open Firefox and click the three horizontal lines (hamburger menu) in the top right. Select Settings, then click Privacy & Security in the left sidebar. Under Cookies and Site Data, click Clear Data.
A small window opens. Check both Cookies and Site Data and Cached Web Content. Click Clear. If you want to choose a time range instead of clearing everything, go back to the main Privacy & Security page, scroll down to History, and click Clear Recent History — that option lets you pick a specific time period.
How to clear cache and cookies in Safari
Open Safari and click Safari in the top menu bar. Select Settings (or Preferences on older versions). Click the Privacy tab, then click Manage Website Data. You'll see a list of sites that have stored data. Click Remove All to clear everything, or select specific sites and click Remove.
To also clear your browsing history and cache, go back to the menu bar, click History, and select Clear History. Choose the time range from the dropdown — all history clears the most data.
How to clear cache and cookies in Edge
Open Microsoft Edge and click the three dots in the top right corner. Select Settings, then click Privacy, search, and services in the left sidebar. Under Clear browsing data, click Choose what to clear.
Check Cookies and other site data and Cached images and files. Use the time range dropdown to select All time or a specific period. Click Clear now. If you want Edge to clear this data automatically every time you close the browser, toggle on Clear browsing data at the top of the same page.
What happens when you clear cache and cookies
After clearing, you'll be logged out of most websites — you'll need to sign back in. Sites you visit frequently may load slightly slower the first time because your browser no longer has cached copies of their images and files. This slowdown is temporary; after you visit the site again, the cache rebuilds.
Websites won't be able to track you using old cookies, and you'll free up disk space — how much depends on how long it's been since you last cleared. If you've never cleared cache before, you might free up several hundred megabytes. Clearing regularly keeps the buildup manageable.
Setting your browser to clear automatically
Most browsers can clear cache and cookies automatically when you close them, which removes the need to do it manually. In Chrome, go to Settings > Privacy and security > Clear browsing data, then check the box for 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 Safari, click Safari > Settings > Privacy, then check Remove all website data when quitting Safari. In Edge, go to Settings > Privacy, search, and services, then toggle on Clear browsing data and select Choose what to clear every time you close the browser. This approach keeps your cache and cookies from accumulating without requiring you to remember to clear them.
Frequently Asked Questions
Will clearing cache and cookies break my passwords?
Clearing cookies will log you out of websites, so you'll need to sign back in. However, if your browser has a password manager (like Chrome's built-in password storage or Firefox's password manager), your saved passwords remain intact — they're stored separately from cookies. You can sign back in without re-typing your password.
Can I clear cache without clearing cookies?
Yes. When you open the clear browsing data window in any browser, you can uncheck cookies and leave only cache checked, or vice versa. This lets you free up space from cached files while keeping your login sessions active.
How often should I clear cache and cookies?
There's no fixed rule. If you browse heavily, clearing monthly or quarterly is reasonable. If you're concerned about tracking, clearing weekly or using automatic clearing when you close your browser works well. For most people, clearing every few months is enough to prevent significant buildup.
What's the difference between clearing cache and using private browsing?
Private browsing (Incognito in Chrome, Private Window in Firefox) prevents your browser from storing cache and cookies during that session — nothing is saved when you close the window. Clearing cache and cookies removes data that was already stored from previous browsing. Private mode is useful for one-time tasks; clearing is useful for maintenance.
Will clearing cache make my internet slower?
Temporarily, yes — the first time you visit frequently used sites after clearing, they'll load slightly slower because your browser has to download all the images and files again instead of using cached copies. After that first visit, speed returns to normal as the cache rebuilds.