How to Clear the Cache on an iPhone to Free Up Space

If your iPhone is constantly warning you that storage space is almost full, you have likely already deleted your oldest photos, removed apps you no longer use, and cleared out massive text message threads. However, if your storage is still mysteriously full, the culprit is almost certainly “cached data.”

Every time you browse the internet, stream a podcast, or scroll through social media, your iPhone downloads temporary files (images, scripts, and video fragments) to make the experience faster the next time you open the app. Over months or years, these tiny, hidden cache files can quietly consume gigabytes of precious storage space. Clearing this cache is an excellent way to reclaim storage and improve the speed of an older iPhone.

Step 1: Clear the Safari Browser Cache

The built-in Safari web browser is typically the worst offender for hoarding cached data. Clearing it is straightforward and highly effective.

1. Open the Settings app on your iPhone.
2. Scroll down the list of settings (you will need to scroll quite a bit) and tap on Safari.
3. Scroll down the Safari menu until you find a blue link labelled Clear History and Website Data. Tap it.
4. A pop-up menu will appear asking you to confirm the timeframe. Select All history.
5. Ensure the toggle next to Close All Tabs is switched on (this ensures all cached pages are released from active memory).
6. Tap the red Clear History button to confirm.

Note: Clearing this cache will log you out of most websites, so you will need to re-enter your passwords the next time you visit them.

Step 2: Clear the Cache for Third-Party Apps

Unlike Safari, iOS does not provide a universal “Clear Cache” button for third-party applications like TikTok, Instagram, or Spotify. Instead, Apple relies on individual app developers to build cache-clearing tools directly into their software.

If an app is taking up too much space, you have two options: use the app’s internal settings or completely delete and reinstall the app.

Method A: Internal App Settings (Example: Spotify)

Many media-heavy apps provide their own storage management tools.

1. Open the specific app (e.g., Spotify).
2. Navigate to the app’s internal Settings menu (usually represented by a gear icon).
3. Look for a menu labelled Storage or Data Saver.
4. Tap the button labelled Clear cache. (In Spotify, this clears temporary audio files but does not delete your downloaded offline playlists).

You can check settings menus in apps like TikTok, Twitter/X, and Telegram for similar features.

Method B: The “Offload” Trick (For Apps Without a Cache Button)

If an app (like Instagram) is consuming gigabytes of space but does not offer a “Clear Cache” button, your only option is to use Apple’s “Offload” feature or perform a full reinstallation.

1. Open the Settings app.
2. Tap on General, then tap on iPhone Storage.
3. Wait a moment for the list of apps to populate and calculate their sizes.
4. Scroll through the list and tap on an app that is consuming too much space.
5. You will see two numbers: “App Size” (the actual software) and “Documents & Data” (the cache and your saved files).
6. Tap the blue Offload App button. This deletes the core software while keeping the cache. (This sounds counter-intuitive, but it is step one).
7. Once offloaded, tap Delete App. This permanently deletes the cached Documents & Data.
8. Open the App Store and re-download the app. It will install with a completely empty, fresh cache, saving you massive amounts of storage.

Will Clearing the Cache Delete My Photos?

No. Clearing the Safari cache or deleting app caches will absolutely not delete your personal photos, videos, contacts, or iCloud backups. Cache files are strictly temporary data generated by apps to speed up loading times. Your personal data is completely safe.