Slack Two-Factor Authentication: How to Set It Up

Turn on Slack two-factor authentication in your account settings on the web. Scan the code with an authenticator app and save the backup codes.

Set it up

1. Sign in to your workspace in a web browser.
2. Click your profile picture and open your account or profile settings.
3. Find Two-Factor Authentication and choose Set up.
4. Scan the QR code with an authenticator app and enter the code it shows.
5. Download or copy your backup codes.

Two-factor applies to your Slack account, which can cover several workspaces using the same email.

Methods

Workspace rules

Workspace owners can require two-factor for every member. If your workspace turns this on, you will be asked to set it up before you can continue. If your company uses single sign-on, Slack's own two-factor setting may be hidden.

Lost your phone

• Use a backup code to sign in, then set up two-factor again on the new phone.
• Ask a workspace owner or admin: they can help reset two-factor for members.
• For a personal workspace you own alone, contact Slack support.

Codes rejected

• Set your phone's time to automatic.
• Check you are reading the Slack entry for the right email.
• Type the code before it changes.

Slack on new devices

Each new browser or app sign-in asks for a code. The Slack mobile app may also let you sign in by scanning a code from a computer that is already signed in, or with a magic link sent to your email.

Phishing

Fake Slack login pages are used to steal passwords and codes. Check that the address is your workspace on slack.com before signing in, and report suspicious messages to your admin.

For other work tools, see Microsoft two-factor and GitHub 2FA.

Turning it off

You can turn two-factor off in the same settings page unless your workspace requires it. Keep it on if you use Slack for work.

FAQ

How do I turn on two-factor in Slack?

In account settings on the web, under Two-Factor Authentication.

What if I lose my Slack 2FA phone?

Use a backup code or ask a workspace admin.

Can Slack admins require 2FA?

Yes, owners can require it for all members.

Related: Microsoft two-factor · GitHub 2FA · lost authenticator phone.