Roblox Username Availability Checker
Planning a Roblox identity for a game, group, or creator brand? Learn exactly what Roblox allows, then check whether your name is free across domains and 45+ platforms below so the brand around it lines up.
Roblox username rules
A Roblox username is 3 to 20 characters and may contain letters, numbers, and at most one underscore, which cannot be the first or last character. Roblox also separates your unique username from your changeable display name, the username is the permanent identifier. You can change a username, but it costs 1,000 Robux, so most players treat their original choice as final.
What to do if your Roblox name is taken
If a Roblox name is taken, a single underscore or a short number suffix keeps it within the 20-character limit and readable. Since changing later costs Robux, it pays to pick a name you can also secure as a domain and on social platforms, check those with the search below before you lock it in.
Frequently asked questions
What are the rules for a Roblox username?
It must be 3-20 characters using letters, numbers, and up to one underscore, which cannot be the first or last character.
Does it cost anything to change a Roblox username?
Yes. Roblox charges 1,000 Robux per username change, so your first choice is effectively semi-permanent.
Is the display name the same as the username?
No. The username is your unique, permanent identifier; the display name is a separate field you can change more easily.
Does NameCheq check Roblox availability directly?
Not yet, Roblox is not one of the 45+ platforms NameCheq queries. This page checks your name across domains and those platforms so your wider brand stays consistent.