The Arc alternative for your Mac.

Arc stops working on December 22. Kaizu brings your spaces and pinned tabs across in one click, and it’s free.

Free and open source. For Macs with Apple chips, on macOS 15.4 or later.

What stays the same

In Arc	In Kaizu
Spaces	Spaces, a two-finger swipe apart
Favorites, pinned tabs and folders	All three, in the sidebar
Tabs that archive themselves	Today’s tabs tidy themselves away, and the command bar can find them again
Command bar	⌘T finds websites, open tabs, history and every menu command
Little Arc	Little windows for links from other apps
Split View	Up to four pages side by side
Peek	Link peek
Air Traffic Control	Rules that send a link to the right space, in Settings, under Links
Profiles	Profiles, with separate logins and site data

Ads, trackers and YouTube ads are blocked, with no extension needed.
Cookie pop-ups get rejected for you.
It runs on the same engine as Safari, so it stays light on your Mac.
There’s no account to close. Your tabs and history stay on your Mac, and the code is public.

Do it before December 22. After that, Arc says accounts close and their data is removed within 30 days.

Download Kaizu and follow the steps for opening it the first time.
In Kaizu, choose File, then Import from Arc. Check the list and press Import.
Add your extensions. Open one on the Chrome Web Store and press Add to Kaizu.
Move any passwords saved in Arc to a password manager, since the import won’t bring them. Then sign in to your sites once.
Make Kaizu your default browser in Settings, under General.

Your spaces, pinned tabs, folders, favorites and Today’s tabs. Logins, history and extensions stay in Arc, and Kaizu doesn’t change anything there.

Kaizu uses Safari’s engine, so sites work the way they do in Safari. Many Chrome extensions work too, but some need features only Chrome has.

Sync between devices, a phone app, Easels, Notes and Boosts. Passkey sign-in for Google doesn’t work yet, so use your password there.

No. Kaizu is made for the Mac.