Claude in Chrome: install the extension and use it safely

Anthropic's Chrome extension that lets Claude read, click and type on websites for you from a side panel.

Claude in Chrome is a free extension from the Chrome Web Store, but it only works with a paid Claude plan. Once installed, Claude opens in a side panel and can fill forms, compare tabs and work in sites you are signed in to. It runs in Google Chrome only; there is no official Firefox, Safari or mobile version. Because it acts with your logins, use a separate Chrome profile and keep it away from banking and health sites.

Good for

Pro, Max, Ultra, Team and Enterprise subscribers who want Claude to do browser chores
Developers who want Claude Code to test and debug their web app in a real browser
People who repeat the same web tasks and want them saved or scheduled

Install Claude in Chrome

Claude Code

Copy this prompt.

Add the Claude in Chrome MCP server to Claude Code. Run this command:

claude --chrome

Then check that it loaded and tell me if I need to sign in or restart.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Claude in Chrome extension 1.0.36 or later, Signed in with /login (not an API key).

Run /chrome in a session to check the connection, reconnect, or turn on Enabled by default. Works with Chrome, Edge and other Chromium browsers; not in WSL or through Bedrock, Vertex or Foundry.

From the vendor's docs. Source.

Key facts

Made by: Anthropic
Price: Free extension; needs a paid Claude plan
Plans: Pro, Max, Ultra, Team, Enterprise
Browser: Google Chrome (desktop)
Mobile, other Chromium browsers: Not supported
Claude Code browsers: Chrome, Edge, Brave, Arc, Vivaldi, Opera
Approval modes: Manually approve, Automatically approve, Skip all approvals
Default mode (Cowork side panel): Automatically approve
Works with: Side panel, Claude Desktop, Claude Code
Admin controls: On/off, site allowlists and blocklists (Team, Enterprise)

Permissions

High risk

Claude acts with your logins, so a malicious page could try to steer it into doing something you did not ask for. Use a separate Chrome profile and keep it on Manually approve until you trust the task.

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

Web pages can hide instructions aimed at Claude
Anthropic calls prompt injection the biggest risk. It says its defenses cut attack success to under 0.08% in internal testing, but the chance is not zero. Stop the task if Claude goes off topic, opens sites you did not ask for, or asks for sensitive data. support.claude.com
It acts with every login in your profile
Use a separate Chrome profile without banking, health or government accounts signed in. support.claude.com
The default mode does not ask before each step
In the Cowork side panel (Max, Ultra and Team, and Pro as it rolls out) the default is Automatically approve. Switch to Manually approve on new sites and never use Skip all approvals on sensitive ones. support.claude.com
Always allow on a site is broad
Use it only for sites you fully trust, and remove sites you no longer need under Extension settings, Your approved sites. support.claude.com
Screenshots capture whatever is on screen
Claude screenshots the active tab to read it, so avoid using the side panel while sensitive information is on screen. support.claude.com
Some actions are always blocked
It will not buy things, create accounts, enter card or ID data, or permanently delete emails, files or messages. support.claude.com

Security advisories

No published security advisories as of Nov 1, 2026.

Technical details

Turning on read-only	There is no read-only switch. Manually approve makes Claude ask before each action; admins can restrict sites with allowlists and blocklists.
Talks to	claude.ai. Any site you let it open
Sign-in and keys	Signs in with your Claude account; acts with the browser sessions already in your Chrome profile.
Data retention	Cowork side panel sessions appear in your Claude history, and you can pick them up on the web, in Claude Desktop or on Claude Mobile.
Scopes	Reads and screenshots the active tab Clicks, types and navigates in tabs it controls Uses the sites you are signed in to Talks to Claude Desktop and Claude Code on your computer

Install Claude in Chrome and run your first task

Claude

1
Make a separate Chrome profile
Anthropic suggests a profile with no banking, health or government accounts signed in. In Chrome, click your profile picture, then Add, and sign in only to the sites you want Claude to use.
2
Add the extension
Open the Claude listing in the Chrome Web Store, click Add to Chrome, and sign in with your Claude account. A free account is not enough; you need Pro, Max, Ultra, Team or Enterprise.
3
Pin it and grant permissions
Click the puzzle piece icon in the toolbar, then the thumbtack next to Claude. Accept the permissions Chrome asks for; the extension needs them to see tabs, click and take screenshots.
4
Open the side panel and pick an approval mode
Click the Claude icon to open the side panel. In the Cowork side panel the default is Automatically approve. Switch to Manually approve while you learn how it works, so Claude asks before every action.
5
Give it a small task on one site
Start with something you can check in a minute. When Claude asks about a site, choose Allow this action for one step, or Always allow actions on this site only for sites you fully trust.
Prompt
```
Open my Google Calendar, list my meetings for tomorrow with their start times, and do not change anything.
```
6
Save it as a shortcut or schedule it
Type / in the chat to save or run a saved prompt. To repeat a task, click the clock icon in the upper right of the panel and set a schedule.
7
Use it from Claude Code (optional)
Start Claude Code with the browser connected, then ask it to check your app:
```
claude --chrome
```
Run /chrome inside Claude Code to check the connection or pick Enabled by default.
Prompt
```
Open localhost:3000, submit the signup form with an invalid email, and tell me what error appears and what the console logs.
```

Verdict

Install it if you already pay for Claude and use Chrome: it is the simplest way to let Claude do real work on websites. Keep it in a separate profile and on Manually approve until you trust a task, because it acts with your logins.

Best for

Repeat web chores like forms, lookups and tab comparisons
Testing a web app from Claude Code
Paid Claude users who already work in Chrome

Skip it if

You use Firefox or Safari
You are on the free Claude plan
The task touches banking, health or other sensitive accounts

Comparison

Use the side panel for everyday browsing tasks. Connect it to Claude Code when you want Claude to test the app you are building.

Option	Where you use it	Browsers	Plans	Best for
Chrome side panelThis page	Chrome toolbar	Chrome only	Paid Claude plans	Everyday web tasks
Claude Desktop	Connectors settings	Chrome	Paid Claude plans	Tasks mixing files and web
Claude Code	claude --chrome	Chrome, Edge, Chromium	Paid Claude plans	Testing web apps

Questions

Is Claude in Chrome free?

The extension is free to install, but it only works with a paid Claude plan: Pro, Max, Ultra, Team or Enterprise. A free Claude account cannot use it.

Is there a Claude extension for Firefox?

No. Anthropic offers Claude in Chrome for Google Chrome only and lists no Firefox or Safari version. In Firefox you can still use Claude at claude.ai in a normal tab, but it cannot click or type on other sites for you.

Does it work in Edge, Brave or Arc?

The side panel is supported in Google Chrome only. Claude Code is different: its browser connection works with Chrome and Microsoft Edge, and also sets itself up in Brave, Arc, Vivaldi and Opera.

Is Claude in Chrome safe?

It is safer with care, not safe by default. The main risk is hidden instructions on a web page that try to steer Claude. Anthropic says its defenses cut attack success to under 0.08% in internal testing, but the chance is not zero. Use a separate Chrome profile, avoid banking and health sites, and stop a task if Claude goes somewhere you did not expect.

What will Claude refuse to do in the browser?

Whatever mode you pick, it will not buy things, create accounts, handle card or ID numbers, or permanently delete emails, files or messages. It also will not follow instructions it finds inside emails or web pages.

How do I stop Claude acting on a site I allowed?

Click the Claude icon, then the three dots at the top right of the side panel, then Extension settings. On the Permissions page, remove the site under Your approved sites.

Can I use it with Claude Desktop or Claude Code?

Yes. In Claude Desktop, go to Settings, Customize, Connectors, find Claude in Chrome and click Configure. In Claude Code, start with claude --chrome or run /chrome; you must be signed in with your Claude account, not an API key.

Why does Claude Code say "Browser extension is not connected"?

Chrome is closed, the extension is off, or it is signed in to a different Claude account or organization than Claude Code. Sign both in to the same organization, restart Chrome and Claude Code, then run /chrome and choose Reconnect extension.

Does it work on my phone?

No. Claude in Chrome is not supported on mobile devices. You can pick up a Cowork side panel session on Claude Mobile, but Claude cannot use a browser there.

Information

updated Nov 1, 2026

Website Get started guide Chrome Web Store

Sources

Docs, issue trackers and discussions this page is built from.

Show all 4

Use Claude Code with Chrome · code.claude.com
Get started with Claude in Chrome · support.claude.com
Use Claude in Chrome safely · support.claude.com
Claude in Chrome permissions guide · support.claude.com