To unmute everyone in Roblox, the usual fix is to go to the player’s profile or your privacy/chat settings and use the Unmute option for each user you previously muted. Roblox’s text chat commands also support /unmute <username>, but that only works for a user you already muted individually.

What to try

  • In chat, type /unmute username for each person you want to restore.
  • Check your Roblox privacy or blocked-users area and remove any mute/block there.
  • If the mute list seems stuck or wrong, rejoining the game or refreshing the page can sometimes clear the visual issue.

About “unmute all”

There does not appear to be a reliable global “unmute all” command for standard Roblox chat; the available command shown in the sources is per-user /unmute <username>. Some reports describe bugs where muting/unmuting affects more than one profile or where the interface looks like everything is muted, but unmuting one user or revisiting preferences can fix it.

If this is voice chat

For voice chat, the “unmute all” button issue may be tied to the UI or whether anyone in the server is actually speaking. In that case, checking the voice controls or clicking the mute/unmute area on the player UI is the likely fix.

Best guess for your phrase

If you meant “how do I undo /mute for everyone I muted?”, the practical answer is: unmute each user one by one with /unmute username, because Roblox’s documented command is individual-based.

TL;DR: Roblox doesn’t show a true universal /unmute all command in the sources I found; use /unmute <username> for each person, or clear the mute/block list in settings.