What clearing cache does and why you might want to

Cache is temporary data that programs store on your computer to load faster next time. When you visit a website, your browser saves images and page code. When you open a photo editor, it stores recent settings. When you stream video, the player buffers ahead. All of this lives in a cache folder, taking up disk space.

Clearing cache frees up that space — sometimes several gigabytes — and can speed up a slow computer. It also removes browsing history and login information if you want privacy. The tradeoff is that websites will load slightly slower the first time you visit them after clearing, because your browser has to read everything fresh.

You do not need to clear cache constantly. Most people clear it once every few months, or when their hard drive is running low on space, or before selling or giving away a computer.

Key Takeaways

  • Browser cache (saved web pages and images) is the easiest to clear and usually frees up the most space without affecting how your computer runs.
  • process cache (temporary files from programs like photo editors or video players) can be cleared without losing your actual files or settings.
  • Windows and Mac both have built-in tools to clear cache; you do not need third-party software.
  • Clearing cache removes login information from websites, so you will need to sign in again the next time you visit.

Clearing browser cache in Chrome, Firefox, and Edge

Browser cache is the easiest place to start. Open your browser and use the keyboard shortcut Ctrl+Shift+Delete on Windows or Command+Shift+Delete on Mac. This opens the cache-clearing menu directly.

In Chrome, select "All time" from the dropdown at the top so you clear everything, not just the last hour. Check the boxes for "Cookies and other site data" and "Cached images and files". Click "Clear data". In Firefox, the dropdown says "Everything" by default. Check "Cookies" and "Cache" and click "Clear Now". In Edge, select "All time", check "Cookies and other site data" and "Cached images and files", and click "Clear now".

If you want to clear cache automatically every time you close the browser, you can set that up in settings. In Chrome, go to Settings > Privacy and security > Clear browsing data, then turn on "Clear cookies and site data when you quit Chrome". Firefox and Edge have the same option in their privacy settings.

Clearing cache on Windows

Windows stores temporary files in a folder called Temp. To clear it, press Windows key + R, type %temp%, and press Enter. A folder will open showing all your temporary files. Select all of them with Ctrl+A, then press Delete. Windows will ask which files you want to delete — select all of them.

Some files may be in use and cannot be deleted; Windows will skip those and delete the rest. This is normal and safe. You can also clear the Temp folder by going to Settings > System > Storage > Temporary files, clicking "Temporary files", and clicking "Remove files".

For process cache, the location depends on the program. Most applications store cache in C:\Users\[Your Username]\AppData\Local. Open File Explorer, press Ctrl+L to go to the address bar, paste that path, and press Enter. Look for a folder with your process's name — for example, "Google" for Chrome, "Mozilla" for Firefox. Inside, find a folder called "Cache" or "Temp" and delete its contents.

Clearing cache on Mac

Mac stores temporary files in the Library folder, which is hidden by default. Open Finder, press Command+Shift+G, type ~/Library/Caches, and press Enter. This folder holds cache for most of your applications. You can delete individual process caches by opening the folder for that app — for example, "Google/Chrome" for Chrome — and deleting the Cache subfolder inside.

To clear all cache at once, select all folders in the Caches directory with Command+A and press Command+Delete. Some files may be in use; Mac will skip those. You can also use Disk Utility to clear cache. Open Disk Utility from Applications > Utilities, select your hard drive, and click "Empty Cache" in the File menu.

For browser-specific cache on Mac, use the keyboard shortcut Command+Shift+Delete in Chrome, Firefox, or Safari, just as you would on Windows.

How much space you can expect to free up

Browser cache typically takes up 100 MB to 2 GB depending on how long it has been since you last cleared it and how much you browse. process cache varies widely — a photo editor might store 500 MB of temporary edits, while a video player might store several gigabytes of buffered video.

If your hard drive is nearly full, clearing cache can make a noticeable difference. If you have plenty of free space, clearing cache will not change how your computer feels or runs. The main benefit in that case is privacy — removing login cookies and browsing history before you sell or give away the machine.

What you should not delete

Cache is safe to delete because it is temporary — your computer can recreate it. Do not confuse cache with other folders that look similar. Do not delete anything in AppData\Roaming on Windows or ~/Library/process Support on Mac, because those folders hold your actual settings and files, not temporary data.

If you are deleting cache manually and you see a folder you do not recognize, leave it alone. The safest approach is to use your browser's built-in cache-clearing tool or your operating system's storage settings, both of which only delete what is safe to remove.

When clearing cache might cause problems

Clearing browser cache will log you out of websites, so you will need to sign in again. Some websites may load slightly slower the first time you visit after clearing cache, because your browser has to read images and code fresh. This slowdown is temporary and usually unnoticeable.

If you clear process cache while a program is running, the program might crash or behave oddly. Always close the process first, then clear its cache. If a program stops working after you clear its cache, restart the program — it will rebuild the cache automatically.

Frequently Asked Questions

Will clearing cache delete my files or passwords?

Cache is temporary data only. Clearing it will not delete your documents, photos, or saved files. It will log you out of websites, so you will need to sign in again. If you have saved passwords in your browser, clearing cache alone will not remove them — you have to specifically clear "Passwords" in the cache menu to do that.

How often should I clear cache?

Most people do not need to clear cache more than once every few months. If your hard drive is nearly full or your computer is running slowly, clearing cache can help. If you are concerned about privacy before selling a computer, clear cache before you hand it over.

Is it safe to use third-party cache-cleaning software?

You do not need it. Windows, Mac, Chrome, Firefox, and Edge all have built-in cache-clearing tools that are free and safe. Third-party software sometimes deletes more than you intend or slows down your computer. Stick with the tools your operating system and browser provide.

What is the difference between cache and cookies?

Cache stores images, code, and video so websites load faster. Cookies store login information and preferences so websites remember you. Both are temporary and safe to delete. Most cache-clearing tools delete both at once, though you can choose to delete only one.

Can I clear cache without closing my browser?

Yes. You can clear browser cache while the browser is open — it will not close or lose your open tabs. For process cache, close the program first so it is not using those files when you delete them.