What clearing your cache actually does
Clearing your cache in Safari removes the temporary files your browser has stored from websites you've visited. These files — images, scripts, stylesheets — normally speed up loading because Safari doesn't have to read them again. When you clear the cache, Safari forgets them, so the next time you visit those sites, it downloads everything fresh.
This matters for a few practical reasons. If a website looks broken or loads strangely, an old cached version might be the culprit. If you're on a shared computer and want to remove traces of where you've been, clearing cache is one layer of that. If your Safari is running slowly or your Mac is running low on storage, cache can take up real space — though usually not enough to solve a major problem on its own.
Clearing cache does not sign you out of websites, delete your passwords, or remove your browsing history. Those are separate things. Cache is just the temporary files.
Key Takeaways
- Cache is temporary files Safari stores so websites load faster the next time you visit them.
- Clearing cache removes those files but does not sign you out, delete passwords, or erase your history.
- On Mac, go to Safari menu → Clear History, choose "all history" and make sure "Cookies and other website data" is checked.
- On iPhone or iPad, go to Settings → Safari → Clear History and Website Data and choose the time range you want cleared.
- If a website looks broken or won't load properly, clearing cache is often the first thing to try.
Clearing cache on Mac
Open Safari and click the Safari menu in the top left corner of your screen. You'll see "Clear History" near the bottom of the menu. Click it.
A window will pop up asking how far back you want to clear. The dropdown menu shows options like "the last hour," "today," "today and yesterday," or "all history." Choose the time range that fits what you need. If you're troubleshooting a broken website, "all history" is usually safest. If you just want to clear out old files, pick a longer range like "the last week."
Below the time range, you'll see a checkbox for "Cookies and other website data." Make sure this box is checked — this is what actually clears the cache. If it's unchecked, Safari will only clear your browsing history, not the temporary files. Click "Clear History" and you're done.
Clearing cache on iPhone or iPad
Go to the Settings app on your device. Scroll down and tap Safari. Near the bottom of the Safari settings, you'll see "Clear History and Website Data."
Tap it. A menu will appear asking you to choose a time range: "the last hour," "today," "today and yesterday," or "all time." Pick the range you want. Unlike Mac, you don't get a separate checkbox — tapping "Clear History and Website Data" clears both your history and your cache at the same time.
After you tap, Safari will clear everything from that time range. There's no confirmation screen, so it happens when ready.
When clearing cache actually solves the problem
If a website won't load, shows old content, or displays broken images, clearing cache is worth trying first. Websites update constantly, and sometimes Safari's stored version is out of date or corrupted. A fresh read usually fixes it.
If you're having trouble logging into a website, clearing cache and cookies together can help — sometimes old login data gets stuck. If you're testing a website you built or work on, clearing cache before each test ensures you're seeing the current version, not an old one.
Clearing cache does not fix slow internet speed, solve most performance problems, or free up meaningful storage space on modern Macs or iPhones. If your device is slow or full, the issue is usually something else.
The difference between cache, cookies, and browsing history
These three things live in Safari but do different jobs. Cache is temporary files — images, code, stylesheets — that make websites load faster. Cookies are small text files websites use to remember you — your login, your preferences, items in your shopping cart. Browsing history is the list of websites you've visited, which Safari shows in the History menu.
When you clear history on Mac, Safari asks if you want to clear cookies and website data at the same time. On iPhone, it clears all three together. If you only want to clear one type, Mac gives you that option; iPhone does not. If you need to keep your passwords and logins but clear everything else, you have to use Mac Safari — iPhone doesn't offer that level of control.
Why websites ask you to clear cache
When a website's support team tells you to clear your cache, they're asking Safari to forget the old version of their site and read the new one. This is especially common after a website updates its design or fixes a bug. Your browser might be showing you the old cached version, and the support team knows a fresh read will show you the current version.
This is also why clearing cache is the first troubleshooting step for most browser problems. It's safe, it takes 30 seconds, and it solves a surprising number of issues without any risk to your data or accounts.
Frequently Asked Questions
Will clearing cache sign me out of websites?
No. Clearing cache removes temporary files only. Your login information is stored in cookies, which are separate. If you want to stay logged in, clear cache without clearing cookies. On Mac, you can do this by unchecking "Cookies and other website data" before you clear. On iPhone, you cannot separate them — clearing history clears both.
Can I clear cache for just one website instead of all of them?
Safari does not have a built-in way to clear cache for a single website. You have to clear everything or nothing. If you need to clear cache for one site without affecting others, you can use a private browsing window for that site going forward, or use a different browser that offers per-site cache clearing.
How often should I clear my cache?
There's no set schedule. Most people never need to clear cache unless a website breaks or their device is running low on storage. If you share your Mac or iPad with others and want privacy, clearing cache before you hand it over makes sense. If you're a web developer testing your own site, you might clear it multiple times a day.
Does clearing cache delete my passwords?
No. Passwords are stored separately in Safari's password manager, not in cache or cookies. Clearing cache will not affect them. If you want to delete a saved password, you have to do that through Safari settings under Passwords, not through the clear cache menu.
What if clearing cache doesn't fix the problem?
If a website still won't load after clearing cache, try restarting Safari, restarting your device, or trying a different browser. If the problem persists only on that one website, it might be an issue with the site itself, not your browser. If multiple websites are broken, your internet connection might be the problem.