What happens when you create a username

When you make a Roblox account, you pick a username that becomes your public identity on the platform. This name appears on your profile, in games you play, and in chat with other players. Once you confirm your username, you cannot change it for 30 days — after that, you can change it once every 30 days, but each change costs 1,000 Robux (Roblox's in-game currency that you buy with real money).

Your username must be between 3 and 20 characters long and can include letters, numbers, and underscores. Roblox blocks usernames that contain profanity, impersonation of famous people, or references to real-world violence or illegal activity. If you try to create a username that breaks these rules, the system will reject it and ask you to try again.

Key Takeaways

  • Your username must be 3 to 20 characters and can use letters, numbers, and underscores only.
  • You cannot change your username for 30 days after creating your account, so choose carefully the first time.
  • Roblox automatically rejects usernames containing profanity, impersonation, or violent references.
  • After 30 days, you can change your username once per month, but each change costs 1,000 Robux.

Creating your username during account setup

When you first sign up for Roblox, the username field appears on the registration page. Type your chosen name directly into the box labeled "Username." The system checks in real time whether the name is available — if someone else already has it, you will see a red X and a message saying the username is taken. If it is available and follows Roblox's content rules, you will see a green checkmark.

Keep trying different combinations until you find one that is available and that you want to keep for at least 30 days. Once you finish the rest of your account setup (email, password, date of birth) and confirm your email address, your username is locked in. You cannot proceed without a valid username, so the system will not let you skip this step.

Choosing a username you will not regret

Think about what other players will see when they look at your profile or encounter you in a game. Usernames that include numbers or underscores (like "Player_123" or "GamerKing88") are easier to get because they are less popular, but they are also harder for friends to remember and type. Shorter names are more memorable but harder to find available.

Avoid usernames that reference your real name, age, location, or school, since other players can see this information and you may not want strangers to know personal details about you. Similarly, do not use the same username you use on other websites or games — keeping your Roblox identity separate makes it harder for someone to track you across platforms.

What to do if your desired username is taken

If the username you want is already in use, the registration page will tell you when ready. You have three main options: add numbers to the end (like "CoolName42"), add an underscore in the middle (like "Cool_Name"), or choose a different name entirely.

You can also check whether the account using that username is still active by searching for the player in Roblox's player search. If the account has been inactive for a very long time, Roblox may eventually release the username, but there is no way to request this or know when it will happen. Your best approach is to pick a variation you like and move forward.

Changing your username after 30 days

Once your account is 30 days old, you can change your username through your account settings. Go to your profile, click the settings gear icon, and select "Change Username." Type your new desired name and check whether it is available. If it is, you will see the cost displayed: 1,000 Robux.

You must have 1,000 Robux in your account balance to complete the change. If you do not have enough, you will need to buy Robux through the Roblox website or app before you can proceed. After you confirm the purchase, your username changes when ready, and you can change it again after another 30 days if you want to.

Username rules and what gets rejected

Roblox's content filter automatically blocks usernames that contain swear words, slurs, or references to drugs, violence, or sexual content. The system also rejects usernames that try to impersonate real celebrities, politicians, or famous fictional characters — for example, you cannot create a username that is exactly "ElonMusk" or "SpiderMan."

Usernames that look like they are trying to scam or impersonate Roblox staff (like "Roblox_Admin" or "RobloxModerator") are also blocked. If you try to create a username that violates these rules, the system will show an error message and suggest you try a different name. You can keep trying as many times as you want during account setup.

Frequently Asked Questions

Can I use spaces in my username?

No. Roblox usernames can only contain letters (A–Z), numbers (0–9), and underscores (_). Spaces, hyphens, periods, and other special characters are not allowed. If you want to separate words, use an underscore instead.

What if I forget my username?

You can find your username by logging into your Roblox account — it appears at the top of your profile page. If you cannot remember your password, use the "Forgot Password" option on the login page and follow the recovery steps using your email address.

Can someone else take my username if I do not use my account?

No. Roblox does not release usernames from inactive accounts. Once you create your account and confirm your username, it stays yours even if you do not play for years. The only way to lose a username is if your account is permanently banned by Roblox.

Is there a way to change my username before 30 days?

No. The 30-day lock is permanent and applies to all new accounts. You must wait the full 30 days before you can change your username for the first time. After that, you can change it once per month for 1,000 Robux each time.

What happens if I use a username that is offensive but gets past the filter?

If Roblox moderators discover that your username violates community standards even though it passed the automatic filter, they can force you to change it. Repeated violations can result in account warnings or suspension, so it is best to choose a username that is respectful and appropriate for all ages.