What cache is and why websites use it

Cache is a folder on your computer where your browser stores images, videos, login information, and other data from websites you visit. When you return to a site, your browser loads these stored files instead of downloading them again, which makes pages load faster.

The problem is that cache also remembers you. Websites can see which pages you visited, how long you stayed, and sometimes what you searched for. If you share your computer with other people, they can see this history too. Clearing cache removes these records and forces your browser to download fresh copies of everything the next time you visit.

Cache is different from browsing history — history is a list of URLs you typed or clicked, while cache is the actual files websites stored on your machine. You can clear one without clearing the other, though most browsers let you clear both at once.

Key Takeaways

  • Cache stores website files on your computer so pages load faster, but it also records which sites you visited and what you did there.
  • Clearing cache removes these stored files and the record of your visits, but does not delete your browsing history unless you clear that separately.
  • The steps to clear cache differ by browser — Chrome, Firefox, Safari, and Edge each have their own menu path.
  • You can set your browser to clear cache automatically every time you close it, so you do not have to do it manually.
  • Private or Incognito mode prevents cache from being stored in the first place, though it does not hide your activity from your internet provider or network administrator.

How to clear cache in Chrome

Open Chrome and press Ctrl + Shift + Delete on Windows, or Command + Shift + Delete on Mac. This opens the Clear Browsing Data window directly.

At the top, you will see a dropdown that says "All time" or a specific time range. Click it and select All time to clear everything, or pick a shorter range like "Last hour" or "Last 7 days" if you only want to remove recent visits.

Make sure the box next to Cookies and other site data is checked — this removes login information and tracking data. The box next to Cached images and files should also be checked. If you want to keep your browsing history but clear only the cache, leave the "Browsing history" box unchecked. Then click Clear data.

How to clear cache in Firefox

Open Firefox and press Ctrl + Shift + Delete on Windows, or Command + Shift + Delete on Mac. The Clear Recent History window will open.

Click the dropdown that says "Time range to clear" and select Everything. Below that, you will see checkboxes for different types of data. Make sure Cache is checked. You can also check Cookies to remove login information and tracking data. Then click Clear Now.

Firefox also lets you clear cache automatically. Go to Settings (the hamburger menu in the top right), click Privacy & Security, scroll down to "Cookies and Site Data," and check the box that says Delete cookies and site data when Firefox is closed. Cache will then clear every time you close the browser.

How to clear cache in Safari

Open Safari and click Safari in the menu bar at the top of the screen. From the dropdown, select Clear History.

A window will appear asking how far back you want to clear. Select All history to remove everything. This clears both your browsing history and cached files at the same time — Safari does not separate them the way Chrome and Firefox do.

To make Safari clear cache automatically, click Safari in the menu bar again, then Settings. Go to the Privacy tab and check the box that says Remove history items. From the dropdown, select how often you want this to happen — after one day is a common choice, though you can pick weekly or monthly instead.

How to clear cache in Microsoft Edge

Open Edge and press Ctrl + Shift + Delete on Windows. This opens the Clear browsing data window.

At the top, click the dropdown next to "Time range" and select All time. Below that, make sure Cookies and other site data and Cached images and files are both checked. Then click Clear now.

To clear cache automatically in Edge, click the three-dot menu in the top right, go to Settings, then Privacy, search, and services. Scroll down to "Clear browsing data" and toggle on Choose what to clear every time you close the browser. Edge will then ask you what to clear each time you close it, or you can check the boxes you want cleared automatically.

Using Private or Incognito mode to prevent cache storage

If you do not want cache stored in the first place, use your browser's private mode. In Chrome it is called Incognito, in Firefox it is Private Window, in Safari it is Private, and in Edge it is InPrivate. Open a new private window and browse normally — nothing you do in that window gets stored in cache or history.

Private mode is useful when you are using someone else's computer or a public computer at a library. However, it does not hide your activity from your internet provider, your employer if you are on a work network, or the website owner. It only hides your activity from other people who use the same computer.

To open a private window quickly, press Ctrl + Shift + N in Chrome or Edge, Ctrl + Shift + P in Firefox, or Command + Shift + N in Safari on Mac.

What happens after you clear cache

After you clear cache, websites will load slightly slower the first time you visit them because your browser has to download all the files fresh. This slowdown is usually just a second or two and only happens once per site. After that, your browser will start storing cache again and pages will load at normal speed.

You may also notice that you are logged out of websites — this is because login information is stored in cookies, which are often cleared along with cache. You will need to log back in, but this is actually a sign that the cache clearing worked.

If you cleared cache but a website still seems to remember you, the site may be using other tracking methods that cache clearing does not affect, such as fingerprinting or server-side tracking. Clearing cache handles the most common type of tracking, but it is not a complete privacy solution.

Frequently Asked Questions

Will clearing cache delete my passwords?

Not automatically. Passwords are stored separately from cache in your browser's password manager. However, if you specifically check the box for "Passwords" or "Saved passwords" when clearing data, they will be deleted. Most people should leave that box unchecked unless they want to remove passwords.

Does clearing cache speed up my computer?

Slightly, but not much. Cache takes up disk space, so clearing it frees up a small amount of storage. However, the main reason to clear cache is privacy, not performance. If your computer is running slowly, cache is rarely the cause.

How often should I clear cache?

That depends on your privacy concerns. If you share your computer with others, clearing cache weekly or monthly prevents them from seeing where you have been. If you are the only user, clearing it once a month is usually enough. Setting your browser to clear cache automatically when you close it is the easiest approach.

What is the difference between cache and cookies?

Cache stores website files like images and videos to make pages load faster. Cookies store small pieces of information like login details and tracking data. Both are cleared together in most browsers, but they serve different purposes. Clearing cookies logs you out of websites, while clearing cache just makes pages load slower the next time.

Does clearing cache on my phone work the same way?

The basic idea is the same, but the steps differ. On iPhone, go to Settings, tap Safari, and tap Clear History and Website Data. On Android, open Chrome, tap the three-dot menu, go to Settings, tap Privacy, and select Clear browsing data. The process is similar to desktop browsers but accessed through your phone's settings instead.