To remove someone from a Slack channel, you typically need to be a Workspace Owner or Administrator. Here's how to perform this task on different platforms:

Desktop or Browser

  1. Open the Slack app or visit
  2. Navigate to the desired channel.
  3. Click the person icon (cluster of profile photos) at the top-right corner.
  4. Locate the member you wish to remove and hover over their name.
  5. Click the three dots icon next to their name and select "Remove from #channel".
  6. Confirm the removal by clicking "Yes, remove them".

Mobile Device

For iOS and Android:

  1. Open the Slack app and navigate to the channel.
  2. Type /remove @[member] in the message field where [member] is replaced with the target user's username.
  3. Press the paper plane icon (Android) or "Send" (iOS).

Please note that removing a member from a channel does not remove them from the workspace. To remove a user from a workspace, you would need to deactivate their account from the Settings & Administration section.