Where does Arc keep its cache on a Mac?

Mostly in ~/Library/Caches/company.thebrowser.Browser, with per-profile caches inside ~/Library/Application Support/Arc/User Data — the Chromium layout Arc inherits.

Will clearing the cache delete my spaces and pinned tabs?

No. Spaces, pinned tabs and bookmarks live in the User Data profile, not the cache folders. Only delete the folders named Cache — never the whole User Data or Default folder.

Should I clear cookies too?

Only if a site is misbehaving. Cookies hold your sign-ins; cached images and files are the part that takes the space and goes stale.

Mac cache folders

How to clear the Arc cache on a Mac

By Vishva Variya · Updated November 12, 2026 · 3 min read

Short answer

In Arc, open Settings (⌘,), pick your profile and click Clear Browsing Data, then tick Cached images and files. By hand: quit Arc and empty ~/Library/Caches/company.thebrowser.Browser. Do not delete the User Data folder itself — it holds your bookmarks, passwords and extension settings.

Where is the Arc cache on a Mac?

~/Library/Caches/company.thebrowser.Browser
~/Library/Application Support/Arc/User Data/Default/Cache

Safe to clear. This stores temporary data for the Arc or Dia web browser. Deleting it is safe but the browser may reload some website data more slowly on next launch.

How do I clear the Arc cache in the app?

1Press ⌘, to open Settings
2Select the profile to clear — each profile has its own cache
3Click Clear Browsing Data
4Tick Cached images and files, set the time range, and click Clear data

How do I delete the Arc cache by hand?

1Quit Arc fully with ⌘Q
2In Finder choose Go › Go to Folder and enter ~/Library/Caches/company.thebrowser.Browser
3Move the contents of that folder to the Trash
4For a deeper clear, also empty the Cache folder inside ~/Library/Application Support/Arc/User Data/Default — leave the Default folder itself in place
5Reopen Arc; pages load fresh copies as you browse

What happens when you clear it?

Clearing cached images and files does not touch bookmarks, history, passwords, spaces or pinned tabs. Sites load their assets again on your next visit, so first loads are briefly slower. If you also tick Cookies in the in-app dialog, you will be signed out of sites; the cache-only choice keeps you signed in.

Clearing it with Peekaboo

Peekaboo’s App Caches page lists “Arc / Dia Browser” with its size and the note above, alongside every other cache it finds. It won’t offer a folder the app is still running from, and the cleanup goes to the Trash, so ⌥⌘Z puts it back.

1Open App Caches.⇧⌘E
2Find Arc / Dia Browser, check its size, and move it to the Trash.

Questions

Where does Arc keep its cache on a Mac?: Mostly in ~/Library/Caches/company.thebrowser.Browser, with per-profile caches inside ~/Library/Application Support/Arc/User Data — the Chromium layout Arc inherits.
Will clearing the cache delete my spaces and pinned tabs?: No. Spaces, pinned tabs and bookmarks live in the User Data profile, not the cache folders. Only delete the folders named Cache — never the whole User Data or Default folder.
Should I clear cookies too?: Only if a site is misbehaving. Cookies hold your sign-ins; cached images and files are the part that takes the space and goes stale.