Why you might want to clear cache and cookies
Cache is temporary data your browser stores to load websites faster — images, scripts, and page layouts it has already downloaded. Cookies are small files websites place on your Mac to remember you — login information, preferences, shopping cart contents. Both accumulate over time and can slow your browser, use disk space, or create privacy concerns if you share your Mac.
Clearing them is straightforward and takes under a minute. Your browser will work normally afterward; the next time you visit a site, it will read fresh copies of what it needs. You may have to log back into accounts, but that's the trade-off for the space and privacy you gain.
Key Takeaways
- Cache stores website images and code to speed up loading; cookies store login information and preferences — both can be cleared without harming your Mac.
- Safari, Chrome, and Firefox each have their own menu path to clear cache and cookies, but all take under two minutes.
- You can choose to clear data from the last hour, day, week, or all time — clearing everything is the most thorough option.
- After clearing, you will need to log back into most websites, but your browser will function normally.
How to clear cache and cookies in Safari
Open Safari and click the menu bar at the top of your screen. Select Safari, then scroll down and click Clear History. A window will appear asking how far back you want to clear — choose All History to remove everything, or pick a shorter timeframe like The last day if you only want recent data gone.
This single action clears both cache and cookies in Safari. Click Clear History to confirm. The process takes a few seconds. You will notice Safari may load websites slightly slower the first time you visit them after clearing, because it no longer has cached versions stored — this is normal and temporary.
How to clear cache and cookies in Chrome
Open Chrome and click the three vertical dots in the top right corner. Select Settings from the dropdown menu. On the left side, click Privacy and security, then click Clear browsing data.
A window will open with checkboxes for different data types. Make sure Cookies and other site data and Cached images and files are both checked. At the top, use the dropdown menu to choose your timeframe — All time clears everything. Click Clear data to finish. Chrome will close the window once it's done.
How to clear cache and cookies in Firefox
Open Firefox and click the menu button (three horizontal lines) in the top right corner. Select Settings, then click Privacy & Security on the left. Under the Cookies and Site Data section, click Clear Data.
A window will appear with two checkboxes. Make sure both Cookies and Site Data and Cached Web Content are checked. Click Clear to remove them. Firefox will confirm the action is complete. If you want to clear only recent data instead of everything, you can use the keyboard shortcut Command + Shift + Delete to open the full history clearing menu, where you can choose your timeframe.
What happens after you clear cache and cookies
Your browser will function normally, but you will notice two changes. First, websites may load slightly slower the first time you visit them, because your browser no longer has cached versions of images and code. This slowdown is temporary — subsequent visits will be normal. Second, you will be logged out of most websites and services. The next time you visit Gmail, Facebook, your bank, or any other site that uses login cookies, you will need to enter your username and password again.
Some websites may also forget preferences you set — like language choice or dark mode settings — because those are often stored in cookies. You can reset them once you log back in. This is why many people clear cache and cookies only when they notice their browser running slowly or when they are concerned about privacy, rather than doing it constantly.
How to clear cache and cookies automatically
If you want your browser to clear cache and cookies without you doing it manually, you can set it to happen automatically. In Safari, go to Safari > Settings > Privacy, then check Remove history items and choose a timeframe like After one day. In Chrome, go to Settings > Privacy and security > Clear browsing data, check Always clear cookies and site data when you close Chrome. In Firefox, go to Settings > Privacy & Security and under Cookies and Site Data, select Delete cookies and site data when Firefox is closed.
Automatic clearing is useful if you share your Mac or want privacy without thinking about it. The downside is you will be logged out of websites every time you close your browser, which can be inconvenient if you use the same sites daily.
When to clear cache versus when to leave it alone
Clear cache and cookies when your browser is running slowly, when you are selling or giving away your Mac, when you are concerned about privacy on a shared computer, or when a website is behaving strangely (sometimes old cached data causes login or display problems). You do not need to clear them regularly unless you are on a Mac with very limited storage space.
Leave cache and cookies alone if your browser is working fine and you do not share your Mac. Cache actually helps your browsing experience by making websites load faster. Cookies are only a privacy concern if someone else uses your computer or if you are worried about a specific website tracking you. In those cases, clearing is worth the inconvenience of logging back in.
Frequently Asked Questions
Will clearing cache and cookies delete my saved passwords?
No. Passwords are stored separately from cookies and cache. When you clear cache and cookies, you will be logged out of websites, but your saved passwords remain in your browser's password manager. You can log back in using the saved password without typing it again.
Can I clear cache and cookies for just one website?
Yes, in most browsers. In Safari, go to Develop > Empty Caches (you may need to enable the Develop menu first in Settings). In Chrome, right-click on the website and select Inspect, then go to the process tab and delete storage for that site. In Firefox, go to Settings > Privacy & Security > Manage Data and remove the specific site.
How much space will clearing cache and cookies free up?
It depends on how long you have used your browser and how many websites you visit. Cache can range from a few hundred megabytes to several gigabytes. For most people, clearing cache and cookies frees up between 500 MB and 2 GB. You can check how much space your browser is using before clearing by looking at your Mac's storage settings.
Do I need to clear cache and cookies on my phone too?
Yes, the same process works on iPhone and Android. On iPhone, go to Settings > Safari > Clear History and Website Data. On Android, open Chrome, tap the three dots, go to Settings > Privacy > Clear browsing data. Phone browsers accumulate cache and cookies just like Mac browsers do.