Move group DMs to a private channel
Group direct messages (DMs) are conversations between three or more people, and they're great for getting in touch quickly. When they turn into long-term discussions — or when you need to invite more than nine people to the conversation — you can convert your group DM to a private channel.
Note: At this time, you cannot convert Group DMs to private channels on our mobile apps.
Convert a group DM to a private channel
- From your desktop, click the gear icon in the top right.
- From the menu, select Convert to private channel.
- To confirm, click Yes, continue.
- Enter a name for the new channel.
- Click Convert to a private channel.
All members of the group DM will be notified with a Slackbot message. Here's an example: 
Note: Only members with permission to create private channels can move a group DM to a private channel.
Tip: When you invite a new member to a private channel, you'll have the option to retain message history. Choosing this option allows the new member to view your original group DMs.
- By default, all members and Multi-Channel Guests, can use this feature.
- Available on free and paid plans.