Open Roblox and join a game or open the chat
Click the chat box or press the chat key
Type `/w username message`
Replace `username` with the player’s exact Roblox name
Replace `message` with what you want to say
Press Enter to send the private message
If whisper chat is not available, use the player’s profile to message them if enabled
You can also use the Roblox app or website messages if the player allows messages from you