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If a channel's conversation is better suited for a closed audience, Owners and Admins can convert the channel to private . This type of channel is best for discussions that shouldn't be open to everyone.
Keep in mind
Only Workspace Owners/Admins and Org Owners/Admins can convert a channel to private, and they'll need to be a member of the channel to do so. If you're not an Owner or Admin, contact one for help.
The #general channel cannot be converted to a private channel.
Shared channels will only be converted in the workspace that makes the change.
Files within the channel will not become private.
Convert a channel to private
Note: It’s not possible to undo this action. Once you’ve converted a channel to private, you cannot make it public again.
From your desktop,
o pen the channel you'd like to make private. Click the
gear icon in the top right.
Select Additional options from the menu .
Choose Change to a private channel. If you don't see the option to convert the channel, reach out to an Owner or Admin for help.
Click A message will post in the channel to let members know it’s been converted. Change to Private to confirm.
It’s not possible to convert a channel to private from the Slack iOS or Android app.
Restrict who can convert channels
By default, Owners and Admins of a workspace or org can convert channels to private. If they’d prefer, Workspace and Org Owners can limit the channel management preferences for People who can create private channels — including private channel conversions — to only Owners.
Who can use this feature?
Workspace Owners/Admins and Org Owners/Admins
Free , Standard , Plus , and Enterprise Grid plans