Claude Cowork built-in browser

Claude Cowork's built-in browser is a browser that opens in a side panel of the Claude desktop app when a task needs a website. Claude can navigate pages, read them, click and type, for example filling in a form, pulling numbers from a dashboard, or working through a portal that has no connector. The user can keep working while Claude handles the web part of the task.

The browser is separate from the user's own browser. Claude does not see the user's tabs, bookmarks or passwords. Users can optionally bring over logins site by site from Chrome, Edge or Firefox on macOS, or from Firefox on Windows and Linux. Banking, email and single sign-on sites are excluded unless the user chooses to include them. The Claude in Chrome extension remains the option for pages already open in the user's own browser, and stays the default if already in use. The preferred browser can be changed in Settings → Cowork → Preferred browser.

It runs the same safeguards as Claude in Chrome, including checks that review Claude's actions against the user's request. Anthropic states that these reduce but do not eliminate prompt injection risk and recommends starting on trusted sites. It is rolling out in the desktop app on macOS, Windows and Linux (in beta) to Pro, Max, Ultra and Team plans, and is on by default once available. Enterprise admins can manage it under Organization settings → Cowork → Built-in browser. It can be driven from web or phone only while the desktop app is open and online.