Chrome taking up space on Mac: cache, profiles and its AI model

When Chrome is taking up space on a Mac, it's usually for one of three reasons: its cache, the data kept in each Chrome profile, or the on-device AI model Chrome downloads in the background on capable Macs. Each has its own fix, and none of them needs Finder.

To clear the cache and stay signed in, open Chrome's Delete browsing data, choose All time and select only Cached images and files. To remove the AI model and stop it coming back, turn off On-device AI in Chrome's settings. To drop a whole profile you no longer use, delete it from Chrome's profile menu.

Two smaller things add to it: the website data that sites store in each profile, and the update downloads Google's updater keeps. Both are covered below, with what each costs to remove.

None of this makes a Mac faster. It frees space, and the cache grows back as you browse. The lasting gains come from the model, unused profiles and sites you've stopped visiting.

Where Chrome's space goes on a Mac

Chrome keeps its parts in four places: the app in your Applications folder, a cache folder, a data folder with one subfolder for each profile, and Google's updater. Only some of it is safe to clear, and Chrome's own settings are the right way to clear most of it.

What are the parts of Chrome's storage?

Here are the main ones, with how safe each is to remove. Safe means Chrome recreates it and nothing is lost; Usually safe means it comes back at a cost.

Part	Where it lives	What it holds	Level
Cache	~/Library/Caches/Google/Chrome	Pages, images and compiled scripts, one folder per profile	Safe
Profiles	~/Library/Application Support/Google/Chrome/Default and Profile 1	Bookmarks, history, passwords, extensions, settings	Your data
Site storage	Service Worker and IndexedDB in each profile	Offline data that sites and web apps keep	Usually safe
On-device AI model	~/Library/Application Support/Google/Chrome/OptGuideOnDeviceModel	The model Chrome's AI features run on	Usually safe
Update downloads	~/Library/Application Support/Google/GoogleUpdater/crx_cache	The last update package for each Google app	Safe
The app	/Applications/Google Chrome.app	Chrome itself	Keep, or uninstall

The cache and the profile folders are separate on purpose. Chromium's documentation says that on a Mac, a profile's cache goes in the Caches folder, at the same relative path as its profile in Application Support. That's why clearing the cache never touches your bookmarks or passwords.

Which Storage settings category counts Chrome?

Open System Settings, click General, then Storage. The Chrome app itself is counted under Applications. Its cache, profiles, site storage and AI model aren't: like most apps' data, they count toward System Data.

So a large Chrome footprint usually shows up as a large System Data number, not as a large Chrome entry. Storage settings can't break that number down.

How do you tell which profile folder is which?

Chrome names its profile folders Default, Profile 1, Profile 2 and so on, not by the names you see in Chrome. Chromium's documentation says the Profile Path line on Chrome's version page, at chrome://version, shows the folder of the profile you're in.

Open it in each profile you use and note the folder name. It's the quickest way to match a folder on disk to a profile in Chrome.

Why can't you open Chrome's data folder on macOS 27?

macOS 27 Golden Gate protects the data folders of a few apps in Application Support, so that other apps can't open or change them. Security researcher Wojciech Reguła found Chrome's folder on that list, along with Brave, Edge, Firefox and Discord.

Chrome itself still reads and writes its own data. Other apps, and many disk tools, can't see inside the folder, so they may show it as empty or unreadable. On macOS 26 Tahoe, the folder isn't protected this way.

The cache, in ~/Library/Caches/Google/Chrome, is outside that protected folder. Everything else is best cleared from inside Chrome, which is the route Google documents anyway.

How much space Chrome uses

It varies more than for most apps, because Chrome's footprint grows with every profile, every heavy website and every extra Chrome channel you install. The ranges below are typical for Macs that have these items at all.

• Browser caches and site storage1–200 GB
• AI models bundled with apps4–16 GB · Usually safe

Typical ranges on Macs that have these items at all, from the research behind the app's catalog. The first covers Chrome, Edge, Brave, Arc and Firefox; the second covers app-bundled models in general, and published reports put Chrome's at about 4 GB.

The top of the first range is unusual. It usually means one site or web app storing a very large amount of data in a profile.

How big is Chrome's cache?

There's no single figure, because Chrome's cache grows with what you browse and is kept separately for each profile. A profile used all day for video and web apps keeps a much larger cache than one used for a little reading.

Each Chrome channel adds its own. Chrome Beta and Chrome Canary keep their caches next to Chrome's, in their own folders.

How big is Chrome's AI model?

Google doesn't publish a size, and says the model's size may change as Chrome updates it. Published reports, including MacRumors' in May 2026, describe a file of about 4 GB.

What Google does publish is how much free space it wants before downloading: about 20 GB on its help page, and at least 22 GB on the volume that holds your Chrome profile in its developer documentation. That's far more than the model itself, so Chrome won't start the download on a nearly full disk.

How do you check how much Chrome is using?

For the cache, use Finder. Choose Go › Go to Folder, enter ~/Library/Caches/Google, select the Chrome folder and choose File › Get Info. The profile folders inside it show each profile's share.

On macOS 26, the same works for Chrome's data folder in Application Support, including the AI model's folder. On macOS 27, macOS blocks other apps from that folder, so disk tools may not be able to measure it. Chrome's settings remain the reliable way to see and clear what's in it.

Why does every profile multiply Chrome's footprint?

Because each profile is close to a separate browser. It has its own cache, its own website data, its own extensions and its own history. Two profiles that visit the same heavy web app keep two copies of its offline data.

The AI model is the exception. It sits in Chrome's main data folder rather than inside a profile, so there's one copy for each Chrome channel, however many profiles you use.

How to clear Chrome's cache without signing out

Chrome's own Delete browsing data is the documented route. Selecting only the cache keeps your cookies, so you stay signed in to websites. The steps are short; the choice of checkboxes is what matters.

What are the steps?

1. In Chrome, click More, the three dots at the top right, then Delete browsing data.
2. Choose a time range. All time clears the whole cache.
3. Select Cached images and files. Clear Cookies and other site data and Browsing history.
4. Click Delete data.

Google says some sites may seem slower afterwards, because content such as images has to be downloaded again. For other browsers and apps, see how to clear cache on a Mac, which covers every cache in one place.

Do you have to repeat it in every profile?

Yes, if you want every profile's cache cleared. Each profile has its own cache folder, so open each profile's window and repeat the steps there.

That's also a reason not to bother with profiles you rarely open: their caches stay small, because nothing fills them.

What happens if you're signed in with sync?

Google says that with sync on, data you delete can be deleted across all your devices, and you stay signed in to the Google Account you sync with. The cache isn't synced, so clearing only Cached images and files affects this Mac alone.

History is another matter. Clearing it in a synced profile clears it on your other devices too, which is one more reason to leave that checkbox empty when all you want is space.

Can you clear Chrome's cache in Finder instead?

Yes. The cache folder isn't part of Chrome's protected data folder, and the catalog rates it Safe with Chrome quit:

1. Quit Chrome with Chrome › Quit Google Chrome.
2. In Finder, choose Go › Go to Folder, enter ~/Library/Caches/Google and press Return.
3. Move the Chrome folder to the Trash, or only the profile folders inside it you want to clear.
4. Open Chrome, check it works, then empty the Trash.

Leave other folders in ~/Library/Caches/Google alone unless you know what they are. The catalog's entry for Chrome's cache covers only the Chrome, Chrome Beta and Chrome Canary folders; a folder such as Chrome-headless isn't one of them.

Chrome's on-device AI model

On capable Macs, Chrome downloads a language model in the background so some of its AI features can run on the Mac instead of on Google's servers. At about 4 GB in published reports, it can be the largest single item Chrome stores.

What is the model, and what uses it?

Google's developer documentation calls it Gemini Nano. Google's help page lists the features that use on-device models: help with writing or rephrasing text, scam warnings, page summaries and organizing your tabs. Websites can also use it through Chrome's built-in AI interfaces.

Chrome keeps it in a folder called OptGuideOnDeviceModel in its data folder, and updates it in the background. Google says every update is a full download, and Chrome keeps using the current model until the new one is ready.

When does Chrome download it?

Only when your Mac meets Google's requirements. Google's help page lists an unmetered network connection, enough free space and supported hardware, and says the requirements may change over time.

Its developer documentation is more specific for the Mac: macOS 13 Ventura or later, at least 22 GB free on the volume with your Chrome profile, and either a GPU with more than 4 GB of video memory or 16 GB of memory and four CPU cores. On a Mac that doesn't qualify, the folder never appears.

How do you remove the model and stop it downloading again?

1. In Chrome, click More, then Settings.
2. Click AI Innovations.
3. Turn off On-device AI.

Google says Chrome then deletes the model files and doesn't download them again while the setting is off. Some recent versions of Chrome have shown the switch under System instead; MacRumors described it there in May 2026. If you can't find it, type on-device in the search field at the top of Chrome's settings.

Why not just delete the folder?

Google advises against deleting the model files by hand, because it may not stop Chrome downloading them again. The switch is the supported way, and it's the one that keeps the space free.

On macOS 27 there's a second reason: the folder sits inside Chrome's protected data folder, so Finder and other apps may not be able to change it. On macOS 26, deleting it works but Chrome can fetch it again.

Does Chrome remove the model by itself?

Yes, in two cases. Google's developer documentation says the model is deleted automatically if free disk space drops below a certain threshold, and if your Mac hasn't met the other conditions for it for 30 days.

After such a purge, Chrome doesn't download it again automatically. A new download starts only when a feature or website asks for the model, and only if your Mac qualifies.

What do you lose by turning it off?

The features that depend on the model stop working: on-device writing help, scam warnings, summaries and tab organizing, and sites that use Chrome's built-in AI. Chrome works normally otherwise. Turn the setting back on and Chrome downloads the model again.

For how the model compares with others that apps download for themselves, and how to check its exact size, see AI models hidden inside Mac apps.

Site data, extensions and web apps

After the cache and the model, most of Chrome's remaining space is data that websites, extensions and installed web apps keep in your profile. Chrome lists each kind, so you can remove what you no longer use instead of everything.

How do you delete one site's data?

1. In Chrome, click More, then Settings.
2. Click Privacy and security, then Third-party cookies.
3. Click See all site data and permissions.
4. Search for the site, click the delete button to its right, then confirm with Delete.

For the site you're on, Google gives a shorter route: click the View site information icon at the left of the address bar, then Cookies and site data, then Manage on-device site data.

What does deleting a site's data cost?

You're signed out of that site, its saved preferences are reset, and a web app that works offline downloads its data again. The catalog rates this Usually safe for that reason.

The one real loss is work a web app saved only on this Mac, such as an unsynced draft. If a site lets you work offline, make sure it has synced before you delete its data.

How much can one site store in Chrome?

A great deal, in principle. MDN Web Docs says that in Chrome and other Chromium browsers one site can store up to 60 percent of the disk's total size, and Chrome as a whole uses at most 80 percent.

Chrome keeps that data until you delete it or the disk runs low. Under that pressure, MDN says browsers delete the data of the least recently used sites first, skipping sites granted persistent storage.

MDN describes Safari's seven-day removal of unused sites' data, but no such rule for Chrome. Don't count on Chrome removing old sites' data by itself.

Which sites are worth deleting?

Sites you've stopped using: web apps you tried and dropped, services you've cancelled, video and news sites you no longer visit. A single web app can store several gigabytes for offline use, and Chrome keeps it until the site or you remove it, or the disk runs low.

Leave sites you use every day. Their data comes back on your next visit, and you'd only sign in again for nothing.

How do you remove extensions you don't use?

Right-click the extension's icon to the right of the address bar and choose Remove from Chrome. If its icon isn't there, click More, then Extensions, then Manage extensions, find the extension and click Remove, then confirm.

Each profile has its own extensions, so check every profile you use. Extensions you removed in one profile stay installed in the others.

What about web apps you've installed from Chrome?

Chrome can install a site as an app, from More › Cast, save, and share › Install page as app. To remove one, open it, click More, choose Uninstall followed by the app's name, then Remove.

Google's steps include an option labelled Also delete data from Chrome. Select it if you want the app's stored data gone too; leave it if you might reinstall the app and want to keep your place.

Chrome profiles: the biggest multiplier

Profiles are useful for keeping work and personal browsing apart. Each one you add carries a full set of data, though, and old profiles you've stopped opening keep all of it.

What does each profile keep?

Google says profiles keep your Chrome info separate: bookmarks, history, passwords and other settings. Each also has its own cache, cookies, site data and extensions, in its own folder on disk.

What	Kept per profile	Shared across profiles
Cache	Yes, one folder each	No
Bookmarks, history, passwords	Yes	No
Site data and cookies	Yes	No
Extensions	Yes	No
On-device AI model	No	One copy per Chrome channel
Update downloads	No	One updater for all Google apps

How do you delete a Chrome profile?

1. In Chrome, click your profile picture at the top right.
2. Under Other Chrome profiles, choose Manage Chrome profiles.
3. Find the profile, click More at its top right, then Delete.
4. Click Delete again to confirm.

Google warns that the profile's bookmarks, history, passwords and other settings are erased from the computer. If anything in it matters and isn't synced to a Google Account, export or copy it first.

Does Incognito leave anything behind?

Very little. Google says Chrome keeps some information, such as cookies and site data, during an Incognito session so websites work, and doesn't keep site data or a record of the sites you visited once the session ends. The session ends only when you close every Incognito window.

Files you download in Incognito stay on your Mac until you delete them, and so do bookmarks you save. Look in your Downloads folder for those.

What about Chrome Beta, Dev and Canary?

Each Chrome channel is a separate install with its own data folder, cache and AI model. Chromium's documentation lists their data folders side by side in Application Support: Chrome, Chrome Beta, Chrome Dev and Chrome Canary.

If you installed a test channel once and stopped using it, uninstalling it removes a whole extra browser's worth of data. Use the same steps as for Chrome, below.

Copies of Chrome that developer tools download

Browser testing tools such as Playwright and Puppeteer download their own builds of Chrome and Chromium, often several versions side by side. They aren't the Chrome you browse with, and Chrome's settings don't manage them.

They live in their own folders, and the tools have their own ways to remove old versions. The post on Playwright, Puppeteer and Cypress browser downloads explains each.

Google Updater and the Chrome app

Chrome updates itself through Google's updater, which also keeps other Google apps up to date. It keeps a small cache of its own, and it isn't usually where the space is.

What's in Google Updater's download cache?

Google's updater specification says downloads are cached in a crx_cache folder, with at most one item for each app. Keeping the last package lets the next update be smaller, sent as a difference from the version you have.

The catalog rates it Safe. If you remove it, the next update of each Google app may download the full package instead of a smaller one. There can be two: one for the updater that works for your account, in your Library folder, and one for the updater that works for all users, in the main Library folder.

Does Google's updater stay after you remove Chrome?

Not for long. The same specification says that on a Mac, the updater notices when an app it keeps up to date is no longer at its path, and stops updating it. When the last registered app is gone, the updater uninstalls itself, leaving only a small log file.

If it still keeps other Google apps up to date, it stays to keep them current.

Chrome on macOS 27 and macOS 26

Chrome's own settings work the same on both. What differs is what other apps, including Finder and disk tools, can do with Chrome's data folder.

Task	macOS 27 Golden Gate	macOS 26 Tahoe
Clear the cache	Chrome's settings, or Finder with Chrome quit	Same
Delete site data	Chrome's settings	Same
Remove the AI model	The On-device AI switch	The switch; deleting the folder doesn't stop downloads
Delete a profile	Chrome's profile manager	Same
Remove profile data after uninstalling	Finder may be blocked; delete profiles in Chrome first	Google's Finder steps work
See inside Chrome's data folder	Blocked for other apps	Any app with access to your Library

Why does macOS 27 protect Chrome's folder?

Apple hasn't documented it. The apps on the researcher's list, browsers, Discord and cryptocurrency wallets, all keep sign-in data or keys. He also found that the list is meant to arrive through XProtect, Apple's built-in malware protection, so Apple can add apps to it without an update to macOS.

For you, the practical effect is simple. Manage Chrome's data from inside Chrome, which can always reach it.

Uninstalling Chrome completely

If you've switched browsers, removing Chrome and its data frees all of the above at once. Google's own steps go through the Dock and Finder.

How do you uninstall Chrome on a Mac?

1. Right-click Chrome in the Dock and choose Quit.
2. In Finder, open the folder that contains Google Chrome, usually Applications.
3. Drag Google Chrome to the Trash.

That removes the app but not your profiles. Google treats deleting profile data as a separate, optional step, because it's the only copy of anything you haven't synced.

How do you remove Chrome's profile data?

Google's steps use Finder: choose Go › Go to Folder, enter ~/Library/Application Support/Google/Chrome, then select the folders inside and drag them to the Trash. Google warns that the data won't be on your computer any more.

On macOS 27, that folder is protected, so Finder may not be allowed to change it. If so, delete each profile from inside Chrome before you remove the app, using the steps above. Google also notes that data saved to your Google Account may remain on Google's servers.

What else does Chrome leave behind?

The cache folder in ~/Library/Caches/Google/Chrome stays after Chrome is gone. Nothing will use it again, so it's safe to move to the Trash. Google's updater removes itself once it has no apps left to update.

Mistakes to avoid with Chrome's storage

Most problems come from clearing the wrong kind of data, or deleting files Chrome manages by itself. These are the common ones.

Don't	Why	Instead
Select every checkbox in Delete browsing data	You're signed out everywhere, and synced history goes	Select only Cached images and files
Delete the AI model's folder by hand	Chrome may download it again	Turn off On-device AI
Delete profile folders in Finder	They hold bookmarks and passwords	Delete profiles from Chrome's profile manager
Clear a cache folder while Chrome is open	Chrome writes to it as it runs	Quit Chrome first
Paste a cleanup command from a web page	It can't be undone, and some are malware	Use Chrome's settings
Treat Chrome's memory use as a disk problem	Memory and storage are different	See the note below

Does clearing Chrome's cache make a Mac faster?

No. The cache exists to make pages load faster, so clearing it makes Chrome a little slower until it refills. It frees disk space and fixes stale pages; it doesn't change how fast your Mac runs.

Chrome using a lot of memory is a separate issue, about RAM rather than disk. The post on memory and storage on a Mac explains the difference.

Should you clear Chrome's cache regularly?

No. It refills as you browse, so clearing it every week buys back the same space each time. Clear it when your disk is short of space, when a page misbehaves, or once after removing a profile or an app you no longer use.

A worked example

Say System Data has grown, and you suspect Chrome. You have two profiles, Personal and Work, plus a Chrome Beta you installed once to try a feature.

You turn off On-device AI, and Chrome deletes the model. In each profile, you delete cached images and files, then remove three web apps' site data you no longer use. You delete an old third profile you'd forgotten, and uninstall Chrome Beta. Your sign-ins, bookmarks and passwords in the two profiles you use are untouched.

For Safari's version of the same job, see Safari's cache and website data.

How the app does it

Wombit is a native Mac app that shows what's using your storage, explains every item in plain language, and clears it safely: Trash first, undoable and logged. File names and paths never leave your Mac.

Chrome's folders appear on the map like everything else. Select one and the app says what it is, how safe it is to remove and what removing it costs, from a catalog written and checked by hand with sources:

• ~/Library/Caches/Google/{Chrome,Chrome Beta,Chrome Canary}

  Google Chrome cache

  Web pages, images and scripts that Chrome saved so websites load faster, with a folder for each Chrome profile.

  Safe · Moves it to the Trash

• ~/Library/Application Support/Google/Chrome/{Default,Profile *}/{Service Worker,IndexedDB}

  Google Chrome website data

  Offline data that websites and web apps stored in Chrome, such as service worker caches and IndexedDB databases.

  Usually safe · Explained only: the app shows you how

• ~/Library/Application Support/Google/{Chrome,Chrome Beta,Chrome Dev,Chrome Canary}/OptGuideOnDeviceModel

  Chrome on-device AI model

  The Gemini Nano language model Chrome downloads in the background to run AI features on your Mac.

  Usually safe · Explained only: the app shows you how

• ~/Library/Application Support/Google/GoogleUpdater/crx_cache

  Google Updater download cache

  Update packages for Google Chrome and other Google apps, kept by Google Updater so later updates can be smaller.

  Safe · Moves it to the Trash

Chrome's cache and Google Updater's downloads are Safe: they start checked in Cleanup and count in the headline number. Site data and the AI model are Usually safe. Their catalog entries say how to remove them in Chrome's own settings, because that's the supported route, and the one that keeps the model from coming back.

On macOS 27, folders macOS doesn't let the app read, such as Chrome's data folder, are listed rather than skipped. If Chrome is open, its items are left out of a cleanup, and the review sheet offers to quit Chrome the way ⌘Q does. A cleanup never force-quits an app.

Finding and explaining Chrome's data is part of the free analyzer. Cleanup is PRO: one payment of $4.99 with lifetime access. Every Pro tool's review is free to open, so you see what would go and why before you buy.