Safari on your iPhone can be slow due to too many open tabs, a full cache/corrupted data, background app usage, weak internet, or enabled privacy features like Private Relay, but you can speed it up by closing tabs, clearing history/data, checking your Wi-Fi, disabling extensions, freeing up storage, or resetting network settings, with the core issue often being overloaded data or settings rather than a bad connection.
Too much outdated history data, cache, and cookies.
Safari stores information about every website you visit, and if you're an average Internet user in 2025, it's an awful lot of data. Corrupted DNS cache will also slow Safari down.
Delete history, cache, and cookies
Phones can experience performance issues when the storage is nearly full. Users can check their storage status by going to Settings > General > [Device] Storage. Deleting unnecessary apps, photos, or videos can free up space and improve performance.
If your iPhone or iPad is running slow
How to Tell What's Slowing Down Your Phone
Clearing the cache on your Safari browser is something that should be done periodically, no matter what. Not only will this help speed up your browser, but it will also maximize performance.
Clear your iPhone cache regularly to boost speed and free up space. Safari, Chrome, and apps all store cache that can slow performance. Restarting your iPhone helps clear hidden files and improve stability.
A weak network or Wi-Fi connection can make your iPhone feel sluggish online. Websites, videos, and apps may load slowly or freeze as your device repeatedly tries to reconnect or fetch data. These issues can stem from a faulty Wi-Fi router or misconfigured network settings on your iPhone.
Several factors could contribute to a slow browser experience on macOS, such as a slow internet connection, excessive browser extensions, accumulated cache and cookies, outdated browser, or insufficient memory.
If you encounter that your Mac has a virus on Safari, it can greatly decrease browser performance, or, worse, lead to much more serious problems like data theft.
How to speed up Safari on Mac
You can clear website data occasionally to improve Safari performance:
When you clear your history, Safari removes data it saves as a result of your browsing, including: History of webpages you visited. The back and forward list for open webpages. Top Sites that aren't marked as permanent.
To change Safari back to "normal," you likely want to adjust the tab bar layout or exit Private Browsing; for the layout, go to Settings > Safari > Tabs and choose "Bottom" or "Top," or within Safari, tap the tabs icon and select a layout; to exit Private Browsing, tap the tabs icon and switch from the dark Private tab group back to your standard group (like "Tabs" or "Start Page").
Poor Network Connection: Slow Wi-Fi or cellular data can make pages load very slowly. Too Much Safari Cache and History: Accumulated browsing data can affect speed. Heavy Websites or Tabs: Sites with lots of images, videos, or scripts can slow browsing.
Q1: Will clearing cache delete my passwords? No. As long as you uncheck the password option during the process, your saved credentials remain untouched.
But even if you deleted more Browsing data than you intended to, for any normal sort of website the probable worst that would happen is you would be logged out of some websites, you would lose your browsing history, and websites might take a fraction longer to download than normal the first time you load them.
You'll know your phone has a virus by symptoms like slow performance, rapid battery drain, high data usage, pop-up ads, strange apps, or unexpected messages to contacts, indicating malicious software is using your phone's resources or stealing data. To check, review your Settings > Apps for unfamiliar apps, monitor data/battery usage, and run a scan with a reputable mobile antivirus app like McAfee Security for Android from the Google Play Store or App Store.
10 tips on how to make your phone run faster
Problems with the battery's performance capabilities are the most critical cause of phone lag, but there are other fixable causes as well, such as storage issues, overload, obsolete software, and so on.