How To Lock A Slack Channel

Slack is a flexible and multi-functional workspace that streamlines communication. It provides a platform for organizing channels based on specific topics, projects, or teams. In some instances, it may be necessary to limit access to certain channels to maintain privacy and confidentiality.

The question is – how can you lock a Slack channel? This article breaks down the steps to helping you achieve this.

Restricting Access to a Channel

To restrict access to a certain channel, you have to ensure that the channel is private. Only invited members can join a private channel. Here’s how to do it.

Step 1: Access the Channel Settings

First, open the channel that you want to make private. On the top of the screen, you’ll see the channel’s name. Click on it and then select Settings from the drop-down menu.

Step 2: Change Channel to Private

In the settings menu, click on Change to a private channel. A confirmation box will appear warning you that the action cannot be undone. Click Yes, change it to proceed.

Limits of Private Channels

Changing a channel to private can be a great way to lock a Slack channel, but it comes with some limitations. The main one being that once a channel is made private, it can’t be switched back to a public channel. This is important to keep in mind if you think you may want to switch it back in the future.

Another limitation is that private channels are only visible to team members who’ve been invited, limiting the number of potential participants. So, ensure that you invite all necessary team members before making the channel private.


To lock a Slack channel, simply change the channel’s settings to private. This restricts access to invited members only, ensuring the channel’s privacy and confidentiality. Remember, this change can’t be undone, so only do it if you’re certain it’s the right move for your team.