Roblox allows all users to change their Roblox account's display name in the account settings without spending a dime. Here's how to do it.

To change your Roblox username login to your account and go to the settings section. In a browser this is represented by the gear icon in the upper-right corner.

To get or change a Roblox Display Name, you should first log in to your Account Info page under Settings, then select the edit button next to the Display Name entry above your Username.

Steps for altering your avatar’s appearance in every Roblox experience, from adding and removing items to changing your skin ...

Gamertag, username, display name; a Roblox player has multiple names, each having a purpose. Thankfully, usernames and display names chosen years ago can be changed.