What cookies are and why you might want to delete them

Cookies are small files that websites store on your phone to remember things about you — your login information, what you put in a shopping cart, your preferences. They make browsing faster and more convenient. But they also let websites and advertisers track where you go and what you do, even after you leave their site.

Deleting cookies clears out this stored data. You lose the convenience of staying logged in or having your preferences remembered, but you also remove one way that companies track your browsing. How often you delete them depends on your own comfort level with being tracked — there is no single right answer.

Key Takeaways

  • Cookies are stored in your browser app (Chrome, Firefox, Samsung Internet, or whatever you use), not in a separate Android system folder.
  • The steps to delete cookies differ depending on which browser you use, so you need to open that specific app to clear them.
  • Deleting cookies will log you out of most websites and remove saved preferences, but it does not delete your passwords unless you specifically choose that option.
  • You can set your browser to delete cookies automatically when you close it, which removes the need to do it manually.

Delete cookies in Chrome on Android

Open the Chrome app and tap the three vertical dots in the top right corner. Tap "Settings," then "Privacy and security," then "Clear browsing data." A window will appear with several checkboxes. Make sure "Cookies and site data" is checked. You can also check "Cached images and files" if you want to free up storage space.

At the top of the window, you will see a dropdown menu that says "All time" or a specific time range. Choose "All time" to delete all cookies, or pick a shorter range like "Last 7 days" if you only want to clear recent ones. Tap "Clear data" and the cookies are gone.

If you want Chrome to delete cookies automatically every time you close the app, go back to Settings, tap "Privacy and security," then turn on "Delete cookies and site data when you quit Chrome." After that, you do not have to do it manually.

Delete cookies in Firefox on Android

Open Firefox and tap the three horizontal lines (the menu button) at the bottom right of the screen. Tap "Settings," then scroll down and tap "Delete browsing data." You will see checkboxes for different types of data. Make sure "Cookies" is checked.

Tap "Delete browsing data" at the bottom of the screen. Firefox will clear the cookies when ready. If you want this to happen automatically, go back to Settings, tap "Privacy," scroll to "Data Collection," and turn on "Delete browsing data on quit." Then choose which types of data to delete each time you close the app.

Delete cookies in Samsung Internet

Open Samsung Internet and tap the three horizontal lines at the bottom right. Tap "Settings," then "Privacy," then "Delete browsing data." Check the box next to "Cookies and site data." You can also check "Cached data" to clear temporary files stored by websites.

Tap "Delete" and the cookies are removed. To make this automatic, go back to Settings, tap "Privacy," then turn on "Delete browsing data on exit." Choose which data types to clear each time you close the browser.

Delete cookies in other Android browsers

Most other browsers follow a similar pattern. Open your browser's menu (usually three dots or three lines), look for "Settings" or "Preferences," find the option for clearing browsing data or cache, and check the box for cookies. The exact wording and location vary, but the concept is the same.

If you cannot find the option, search your browser's help documentation or settings for "clear cookies" or "clear browsing data." Most browsers also offer an automatic clearing option in their privacy settings.

What happens when you delete cookies

After you delete cookies, you will be logged out of most websites. The next time you visit them, you will need to log in again. Websites will not remember your preferences — if you had set a site to dark mode or a particular language, it will go back to the default. Shopping carts will be emptied.

Deleting cookies does not delete your saved passwords unless you specifically check that box during the clearing process. It also does not delete your browsing history, bookmarks, or autofill information unless you check those boxes too. You control exactly what gets deleted.

The difference between cookies and tracking

Deleting cookies removes one tracking method, but not all of them. Websites can also track you through your IP address, device fingerprinting (identifying your phone by its unique characteristics), and login accounts. Deleting cookies is useful, but it is not a complete privacy solution on its own.

If you want more privacy overall, consider using a browser that blocks tracking by default (like Firefox with Enhanced Tracking Protection turned on), or using a VPN (a tool that hides your IP address). These work alongside cookie deletion, not instead of it.

Frequently Asked Questions

Will deleting cookies slow down my phone?

No. Deleting cookies frees up a small amount of storage space, but the performance difference is not noticeable on modern phones. Cookies are tiny files. You would have to accumulate thousands of them to see any real impact on speed or storage.

Do I need to delete cookies regularly?

It depends on your comfort level with tracking. If you delete them once a month or once a week, you reduce the amount of data websites collect about your browsing patterns. If you never delete them, websites build a longer profile of your interests. There is no technical reason you have to delete them — it is a privacy choice.

What if I delete cookies but still want to stay logged in?

You cannot do both at the same time. If you delete cookies, you will be logged out. However, you can set your browser to delete cookies automatically only when you close the app, which means you stay logged in while the app is open. When you close and reopen it, the cookies are gone.

Does clearing cookies delete my passwords?

Not unless you check the box for "Passwords" or "Saved passwords" during the clearing process. By default, most browsers keep passwords separate from cookies. You have to actively choose to delete them.

Can websites tell if I deleted their cookies?

Websites cannot directly see that you deleted their cookies, but they can tell when you return without them. If you had a cookie that identified you, deleting it makes you look like a new visitor. Some websites may notice the change in your behavior pattern, but they have no way to know you intentionally deleted the cookie versus clearing your phone or using a new device.