How to Move from Arc to Dia: What Comes Across and What Doesn't

Dia is the browser The Browser Company built after Arc, and the one it wants Arc users to move to. Its importer is the most complete of any browser. Here's how to use it, and what you'll miss.

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When The Browser Company announced Arc's shutdown, it pointed users to one place: Dia. It's the same team, it keeps much of Arc's tab model, and the latest Arc update added what the company calls "an even smoother import into Dia". You have until 22 December 2026, when Arc stops opening.

What comes across

Dia's importer brings over more than any other browser's:

What doesn't come across: Easels, Boosts and other Arc-only features. Dia also doesn't import saved payment methods or autofill data from any browser.

One detail matters if you used several Arc profiles: Spaces that shared an Arc profile become Dia Profiles that share logins, history and extensions. Spaces from different Arc profiles stay separate, just as they were.

Before you start

1. Update Arc to the latest version, which includes the improved Dia import.
2. Keep Arc installed. Dia finds your data through the Arc app, so don't delete Arc until the import has finished and you've checked it.
3. Save your Easels if you use them: Library → Easels → Export All Easels.
4. Check Dia runs on your computer. On Mac, Dia needs Apple Silicon (M1 or newer) and macOS 14 or later; Intel Macs aren't supported. On Windows, Dia shipped its 1.0 release in October 2026.

Step by step

1. Download Dia from diabrowser.com and create a Dia account. It's a separate account from Arc, but you can use the same email address.
2. On Windows, quit Arc first. Otherwise Dia reports that the cookies file is locked.
3. Choose Arc during setup. If you already use Dia: on Mac, open the Dia menu → Import from Another Browser… → Arc; on Windows, open the app menu → Import from another browser… → Arc.
4. Pick which extensions to install when Dia asks.
5. Check the result. Importing from Arc switches Dia to its sidebar layout. Each Arc Space appears as a new Profile, so nothing already in Dia is touched.

The import is a one-time copy, not a sync. Anything you change in Arc afterwards won't appear in Dia.

Arc features in Dia

What about the AI?

Dia is built around an AI assistant that can answer questions about your open tabs, summarise pages and draft text. The browser features above are free, and The Browser Company says the AI is optional. Paid plans for the AI features started rolling out to new Mac users in August 2026; existing users were promised at least 30 days' notice before any change, and paid plans hadn't reached Windows as of early November. Prices have changed several times, so check Dia's plans page for the current tiers.

What Dia doesn't do

• No mobile app. Dia is Mac and Windows only, so there's nothing to replace Arc Search on your phone.
• No Intel Mac support.
• Less of Arc's personality. Little Arc, Peek, Boosts and Easels were what made Arc feel different, and none of them made the move.

Is Dia the right move?

If you want the least disruption, or you relied on Arc Max's AI features, Dia is the obvious choice: it's the only browser that brings over passwords, cookies and extensions as well as your Spaces in one step. If what you loved was Arc's sidebar rather than its AI, Zen Browser is closer in spirit and imports your Spaces too. Our Arc vs Dia comparison sets the two side by side, and the Arc alternatives guide covers every option.

Sources

• The Browser Company: Move from Arc to Dia, Arc Sunset FAQ and Key Dates
• Dia: plans
• 9to5Mac: Dia is now generally available on macOS