The Facebook app is one of the heaviest storage users on most phones because it caches photos, videos, and reels as you scroll. On Android you can clear its cache directly in Settings; on iPhone you offload or reinstall the app.
Short answer:
- Android: Settings > Apps > Facebook > Storage & cache > Clear cache (safe; keeps you logged in).
- In-app (both platforms): Menu > Settings & privacy > Settings > Browser > Clear browsing data.
- iPhone: Settings > General > iPhone Storage > Facebook > Offload App, or delete and reinstall.
- Avoid Clear storage / Clear data unless you are ready to log back in.
Why Facebook Uses So Much Storage
Facebook is a media-heavy app. Every time you scroll the feed, watch Reels, or open Stories, the app downloads and caches images and video so they load instantly the next time. Over weeks this cache can balloon to one or two gigabytes.
On top of the cache, the in-app browser stores cookies and site data from every link you tap, and the app keeps its own copy of downloaded photos and videos. Clearing these caches is safe and reversible: Facebook simply rebuilds them as you use the app.
Clear the Facebook Cache on Android
Android gives you a direct cache button, which is the cleanest fix.
- Open Settings > Apps.
- Scroll to and tap Facebook.
- Tap Storage & cache.
- Tap Clear cache.
This removes temporary media and frees space immediately without logging you out or deleting your saved content. You will not lose anything you care about.
Important: the same screen has a Clear storage (or Clear data) button. That one wipes the app to a fresh install, signing you out and clearing any unsent drafts and downloaded content. Use it only if the app is broken. The clear cache vs clear data guide explains the difference in full, and how to clear app cache on Android safely covers the routine.
Clear Facebook Data From Inside the App
Both Android and iPhone let you clear the in-app browser cache without touching system settings.
- Tap the menu (three lines on Android, bottom-right on iPhone).
- Open Settings & privacy > Settings.
- Scroll to Browser under "Preferences."
- Tap Clear next to "Browsing data" to remove cookies and cached site data.
While you are in Settings, check Media (or Media and contacts) for an option to lower default video quality, which reduces how much Facebook caches going forward.
Clear Facebook Storage on iPhone (Clenoir)
iOS does not offer a per-app "clear cache" button, so you have two options.
- Offload the app: Go to Settings > General > iPhone Storage > Facebook and tap Offload App. This removes the app and its cache but keeps your documents and data, so reinstalling restores your session.
- Delete and reinstall: For a full cache purge, delete the Facebook app and download it again from the App Store. You will log back in, but all the bloated cache is gone.
To see how much space Facebook and other apps are really using on iPhone, Clenoir gives you an on-device storage view and a review-first cleanup flow where you confirm every deletion before it happens.
Stop Facebook From Refilling Storage
A few setting changes keep the cache from ballooning again.
- In Settings & privacy > Settings > Media, turn off "Never autoplay videos" alternatives and reduce default upload/playback quality where offered.
- Disable autoplay so the app stops pre-caching video you never watch.
- Use Facebook Lite (Android) if you are on a low-storage phone; it caches far less.
Repeat the cache clear once a month and the app stays under control. For a wider cleanup, the clean up phone storage hub and the storage cleanup FAQ cover the other big space users on your phone.
What Clearing the Cache Does Not Do
It helps to know the limits so you do not expect the wrong outcome. Clearing the Facebook cache does not delete your posts, photos, messages, or saved items; all of that lives on Facebook's servers and reappears as you scroll. It also will not log you out on Android, because your session token is stored separately from the disposable cache.
What you will notice right after clearing is a slightly slower first load: the feed, your profile photos, and recently viewed Reels have to download again. This is normal and lasts only a few seconds. The trade-off is recovering the space those files were occupying, which is almost always worth it on a phone that is running low.
If Facebook keeps ballooning even after autoplay is off, the Messenger app is often the second culprit, since it caches every shared photo, video, and voice clip separately. Clear its cache the same way under Settings > Apps > Messenger > Storage & cache > Clear cache. Between the two apps, Meta's products are frequently the largest non-media storage users on a phone, so cleaning both in one pass gives the biggest return. Clearing Facebook's cache is safe, takes under a minute, and often recovers a gigabyte or more in one tap.
FAQ
How do I clear the Facebook cache on Android?
Open Settings > Apps, tap Facebook, tap Storage & cache, then tap Clear cache. This removes temporary media and frees space immediately without logging you out or deleting saved content.
How do I clear Facebook storage on an iPhone?
iOS has no per-app clear cache button, so go to Settings > General > iPhone Storage > Facebook and tap Offload App, which removes the app and cache but keeps your data. For a full purge, delete the app and reinstall it from the App Store.
Does clearing the Facebook cache delete my posts or messages?
No. Clearing the cache does not delete your posts, photos, messages, or saved items, since all of that lives on Facebook's servers and reappears as you scroll. You'll only notice a slightly slower first load while the feed re-downloads.