The browser you share with your agents.

Use it as your own browser. Let AI agents work alongside you, in tabs of their own, with your sign-ins and under your rules.

Download Kin Browser Other platforms

Free and open source · MIT licence

Your browser, their tabs.Agents work in tabs of their own. They never see or touch yours.

Public web only, never your machine.No localhost, no router page, no files, no cloud metadata.

Watch it work, stop it any time.Every agent tab says so, with a button to take over.

Built for working beside an agent

Spaces

One named group of tabs for each thing you're doing, and one for each task an agent does. Close a space and pick it up later.

Watch every agent at once

A live grid of every space, refreshed every second while an agent works, with what it did last.

You're in charge

An agent's tab is framed, with a cursor where it's working. Take control or stop the agent with one click. The agent can't see or press those buttons.

Record, replay, re-run

Keep what an agent did, watch it back step by step, or run it again as an automation. Off until you turn it on.

Your sign-ins, your profile

Agents use the sessions in your window. Passwords, two-factor and payments stay your steps.

A real browser

On macOS, an app of its own built on open-source Chromium, with everything it needs inside.

Works with your agent

Claude Code, Codex, or any agent with a terminal. Teach it once, then ask it to use Kin Browser.

# once
kin-browser skill install

# what the agent runs
kin-browser open https://github.com --space "Research"
kin-browser click e42

Claude Desktop, Cursor, or any MCP client. Add it as an MCP server. Or call the local API from your own program.

{
  "mcpServers": {
    "kin-browser": {
      "command": "kin-browser",
      "args": ["mcp"]
    }
  }
}

Agents read a page as a list of things they can act on, like e42 link "Pricing", and act on one at a time. No scripts, no selectors, no developer tools.

Safe to share

Agents work in their own tabs.When they finish, they close only what they opened.
Public websites only.Every address a name points to is checked, so a name that leads inside your network is refused too.
No scripts, no code.Agents can't run JavaScript, use CSS selectors or reach the browser's internals.
You can stop it any time.Take control or stop the agent from its tab. Nothing is queued while you hold it.
Web pages can't drive it.The agent API refuses any request from a web page, including DNS rebinding.
Nothing leaves your computer.The agent API listens on your machine only. Recordings stay on your disk.

Download

Loading the latest release…

macOS: until the app is notarised, the first time you open it, Control-click Kin Browser in Applications and choose Open. The installer also adds the kin-browser command for your terminal.

Questions

Is it Chrome?

On macOS, no: it's a browser of its own, built on open-source Chromium, the project Chrome is built from. On Windows and Linux it currently opens in your Chrome or Edge, with a profile of its own.

Does it see my other browsers' passwords or history?

No. It has its own profile, empty until you use it.

Can an agent do anything I can?

No. It can read and click on public websites, in its own tabs. It can't run code, open files or reach your local network, and you can stop it at any time.

Do recordings take up space?

Only if you turn recording on. Each step is a small screenshot, kept on your computer only, under a limit you set (1 GB unless you change it). The oldest go first.

Is it free?

Yes. Kin Browser is open source under the MIT licence.