How to Clear Facebook Cache on iPhone in 30 Seconds

To clear the Facebook cache on iPhone, delete the Facebook app from Settings > General > iPhone Storage > Facebook > Delete App, then reinstall it from the App Store. The Facebook iOS app has no clear cache button, and the cached data — typically 1–2 GB after a few weeks of normal scrolling — only goes away if the app itself goes away first. The whole process takes about 30 seconds plus the time it takes to redownload, and you will not lose any posts, photos, or messages because all of that lives on Meta's servers.

The 30-second version

1. Open Settings.
2. Tap General.
3. Tap iPhone Storage.
4. Wait a moment for the list to load, then scroll to Facebook.
5. Note the Documents & Data number — that is the cache you are about to wipe.
6. Tap Delete App, then confirm Delete App on the prompt.
7. Open the App Store.
8. Search for Facebook and tap the cloud or Get button to reinstall.
9. Sign back in with your email and password.

That is it. The Documents & Data figure goes back to a few megabytes, and the cache starts rebuilding from scratch as you use the app.

Why there is no clear cache button in the Facebook app

Facebook's iOS app intentionally caches a lot of media. When you open the feed, the app pre-downloads videos, Reels thumbnails, image previews, profile photos, Marketplace listings, and Group covers so they appear instantly when you scroll. None of that is exposed to you as a user — there is no settings screen inside the app that says "Clear Cache," because Meta wants the cache to stay full. A full cache means a faster-feeling feed.

iOS itself does not provide a system-wide clear cache button either. Apple's design philosophy is that an app should manage its own storage, and if it does not, the user's only lever is to remove the app. That lever has two settings: Offload App and Delete App. Only one of them actually clears the cache.

Offload App vs Delete App: the table that matters

Action	Removes app binary	Removes Documents & Data	Frees Facebook cache	Keeps your login
Offload App	Yes	No	No	Yes (auto-restored when reinstalled)
Delete App	Yes	Yes	Yes	No (sign in again)
Force quit (swipe up)	No	No	No	Yes
Restart iPhone	No	No	No	Yes

Force-quitting Facebook from the App Switcher does nothing for storage. Restarting the phone does nothing for storage. Offloading does nothing for the cache — it removes the ~300 MB app binary but leaves the multi-gigabyte cache exactly where it is.

What "Documents & Data" actually contains

When you open Settings > General > iPhone Storage > Facebook, you see two numbers: the app size and Documents & Data. For most heavy Facebook users I have looked at, the split looks something like this:

Component	Typical size
Facebook app binary	300–450MB
Documents & Data (cache)	800MB – 2.2GB
Total footprint	1.1GB – 2.6GB

Documents & Data is a mix of cached video chunks, image thumbnails, your draft posts, GIF previews, autoplay clips you scrolled past, Facebook Watch buffers, and the local copy of your news feed. Almost none of it is essential. If you delete it and reinstall the app, the only thing you actually have to redo is logging back in.

For a deeper walkthrough of how Documents & Data accumulates across every app on your phone, see my guide on how to clear cache on iPhone.

Step-by-step with screenshots

1. Check how much Facebook is using

1. Open Settings.
2. Tap General.
3. Tap iPhone Storage.
4. Wait for the bar at the top to finish calculating.
5. Scroll down the alphabetical app list to Facebook.

Tap it. You will see two lines: App Size and Documents & Data. Write down the Documents & Data number so you can confirm the cleanup worked.

2. Delete the app

On the same Facebook detail screen:

1. Tap Delete App (the red text at the bottom — not Offload App).
2. Confirm by tapping Delete App on the alert.

The Facebook icon disappears from your Home Screen. Documents & Data is now zero.

3. Reinstall from the App Store

1. Open the App Store.
2. Tap the Search tab at the bottom.
3. Type Facebook and tap the result by Meta Platforms, Inc.
4. Tap the Get button or cloud icon to download.
5. Open Facebook once it finishes installing.
6. Log in with your email/phone and password.
7. Approve the new device if prompted (you may get a code by SMS or via another logged-in device).

Open Settings > General > iPhone Storage > Facebook again. App Size will be back to ~300–400MB. Documents & Data should be under 50MB until you scroll for a while.

If you want to avoid doing this every month

The annoying part of this method is that the cache rebuilds as soon as you start scrolling. Within a week of heavy use, Documents & Data can be back to 500MB+. There are three ways to slow it down:

1. Use Facebook in Safari instead of the app. Go to facebook.com in Safari. Safari has its own cache, but you can clear it in seconds at Settings > Apps > Safari > Clear History and Website Data, and the cache rarely grows past a few hundred megabytes.
2. Enable Offload Unused Apps. Settings > App Store > Offload Unused Apps. This only helps if you stop using Facebook entirely for a while — iOS will then offload the binary, though as noted above this does not remove the cache.
3. Turn off autoplay video. Inside Facebook, go to Settings & privacy > Settings > Media > Autoplay > Never Autoplay Videos. This is the biggest single contributor to cache bloat. Your cache will still grow, but slower.

None of these eliminate the underlying problem, which is that Facebook's iOS app does not expose a cache control. The delete-and-reinstall cycle remains the only complete fix.

Where Facebook ranks among iPhone storage hogs

Across the iPhones I have tested, Facebook is in the top five storage offenders alongside Photos, Messages, Safari, and either Instagram or TikTok. The Meta family of apps (Facebook, Messenger, Instagram, Threads, WhatsApp) dominates because they all cache video aggressively and none of them give you a clear cache button.

Orden identifies which apps have the largest caches and shows the size of each one in a single list, so instead of tapping into every app's storage screen one at a time you see the ranking at a glance.

If Facebook is just one piece of a bigger problem, my guides on how to free up iPhone storage and what to do when iPhone storage is full cover the rest of the cleanup in order of impact.

What does not work (and what people keep recommending anyway)

A few methods circulate on TikTok and Reddit that do not actually clear the Facebook cache. For the record:

• Clearing browser data inside Facebook (Menu > Settings > Browser > Clear). This only clears the in-app browser used when you tap external links. The main feed cache is untouched.
• Logging out and back in. Does nothing to Documents & Data.
• Clearing Safari history. Affects Safari, not the Facebook app.
• Resetting all settings. Resets your wallpaper and Wi-Fi passwords but leaves app caches intact.
• Third-party "cache cleaner" apps that promise to clear Facebook cache without deleting it. iOS sandboxing prevents one app from touching another app's storage. Any app claiming to clear Facebook's cache from outside is either lying or just walking you through the same Settings > General > iPhone Storage flow.

Sources and further reading

• Apple Support, "View and manage storage on your iPhone" — https://support.apple.com/en-us/108922
• Apple Support, "Offload unused apps automatically on iPhone" — https://support.apple.com/guide/iphone/offload-unused-apps-iph4f2a78c2c/ios
• Facebook app listing on the App Store, Meta Platforms, Inc., 2026
• Editorial testing across iOS 18.4 devices, May 2026