How to See All Channels in Slack, Including Ones You Have Not Joined

To see all channels in Slack, click Home, then Directories near the top of the sidebar, then the Channels tab. It lists every public channel in the workspace, including the ones you have not joined. Your sidebar shows only channels you are a member of, which is why it looks shorter. On 22 October 2026 we checked the list in our test workspace on the Free plan: it showed all 8 public channels, and none of the private channels we were not in, even though we were the workspace Owner.

What the channel list shows

Each row has the channel name, Joined if you are a member, the member count and the description. A channel you have not joined has no Joined label; in our list that was #w1-1022-bot-public, made by a test bot. That row also carries a Join button.

Above the list you get a search box, Search for channels, and four filters:

• • All channels is a second menu for narrowing the list; we left it as it was.
• • Any channel type picks Public, Private, Archived or External.
• • Workspaces and Organizations filter by workspace and organization; with one workspace they had nothing to narrow.
• • The sort menu switches between Most recommended and A to Z.


Archived channels

Pick Any channel type > Archived to list them. Archived channels do not show in the sidebar, so the directory is the place to find them. See archive a Slack channel for what archiving changes.

Can an Owner see private channels?

Not ones they are not in, at least on the Free plan. We had a test bot create a private channel, #w1-1022-bot-private, with only the bot inside. Then, as the workspace Owner:

• • Any channel type > Private listed one channel: an old archived private channel we were already a member of. The bot's channel was not there.
• • The API agreed. conversations.list with types=private_channel returned only that same channel, and conversations.info on the bot's channel returned channel_not_found.

So the list of "all channels" is all public channels plus the private ones you belong to. To see a private channel, a member has to add you. For the reverse question, who can turn a private channel public, see make a private Slack channel public.

Read a channel before you join

Click a public channel in the list to open it without joining. You can scroll its messages. At the bottom, in place of the message box, Slack shows Details and Join Channel.

Join a channel, and what others see

Click Join Channel. In our test Slack then posted "sieun joined #w1-1022-bot-public" in the channel and showed a welcome card with a star button and the notification setting, which was set to All new posts.

Leaving was quieter. After we left the same channel, its history held no "left" message at all; the join line stayed. Workspace admins choose whether join and leave lines appear (Admin > Settings > Channel Join & Leave Messages), so your workspace may differ. Does Slack notify when you leave a channel has more on who sees what. To leave many channels at once, see leave multiple Slack channels.

When a joined channel is missing from the sidebar

If the directory shows Joined but your sidebar does not list the channel, the sidebar is hiding it, often through a sidebar filter or a collapsed section. Slack channels disappeared from the sidebar walks through each cause.

FAQ

Is there a list of every channel for admins?

Not of private channels on Free, as our Owner test shows. With the API, conversations.list returns public channels plus the private channels the token's user or bot is in; see conversations.list.

How do I find a channel's ID?

Open the channel, click its name, and read the ID at the bottom of the details window. How to find a Slack channel ID shows the other ways.