You choose your username when you create your Roblox account, and you cannot change it later

Your Roblox username is permanent. Once you pick one during account creation, Roblox will not let you change it to something else — not even if you pay for Robux (the in-game currency) or upgrade your account. This means you should think through your choice before you finish signing up, because you are stuck with it.

The username you create becomes your public identity on Roblox. Other players see it when you join games, chat, or visit your profile. It is also the name people use to send you friend requests and messages. Because it is permanent and public, choosing carefully matters more than rushing through the step.

Key Takeaways

  • You create your username as part of signing up for a Roblox account, and Roblox will not let you change it afterward.
  • Your username must be between 3 and 20 characters long and can include letters, numbers, and underscores, but not spaces or special characters.
  • Roblox checks your username against a filter and will reject it if it contains words the platform considers inappropriate or offensive.
  • If your first choice is already taken or rejected, you can try variations like adding numbers or underscores until you find one that works.
  • You can create a display name (separate from your username) later in your account settings, which other players can see alongside your permanent username.

What characters and length are allowed in a username

Your username must be between 3 and 20 characters long. You can use uppercase and lowercase letters (A–Z, a–z), numbers (0–9), and underscores (_). You cannot use spaces, hyphens, periods, or other special characters like @, #, or $.

Roblox checks the length and character rules automatically when you type. If you try to use a space or a character that is not allowed, the sign-up form will not let you move forward. The form will tell you what went wrong so you can fix it.

How Roblox filters usernames for inappropriate content

Roblox runs every username through a content filter before it accepts it. The filter blocks words and phrases the platform considers offensive, hateful, or sexually explicit. If your chosen username contains a flagged word, Roblox will reject it and ask you to pick something else.

The filter is automated, so sometimes it rejects usernames that seem harmless to you — for example, a username containing a word that is innocent on its own but has been misused elsewhere. If your username is rejected and you do not understand why, try a different variation. Adding a number or underscore often solves the problem without changing your intended meaning.

What to do if your first choice is already taken

Roblox has millions of players, so many common usernames are already claimed. When you type a username during sign-up, Roblox tells you when ready whether it is available. If it is taken, you will see a message saying the username is not available.

Your options are to try a variation or pick something different. Common variations include adding numbers to the end (like adding your birth year or a lucky number), inserting an underscore in the middle, or using a number in place of a letter (like using 0 instead of O). You can keep trying different combinations until you find one that is both available and passes the content filter.

The difference between your username and your display name

Your username is permanent and is what Roblox uses internally to identify your account. Your display name is optional and separate — it is what other players see next to your username on their screens. You can create and change your display name anytime after you finish signing up, through your account settings.

Many players use their display name to show a nickname or a more polished version of their username without losing their original account identity. For example, your username might be "Player_5847" but your display name could be "SkyWalker". Other players see both, so a display name gives you a way to personalize how you appear in the game without the permanence of changing your actual username.

How to create your username during sign-up

When you go to the Roblox sign-up page, you will see a field labeled "Username". Type your choice into that field. Roblox checks it in real time — as you type, it tells you whether the name is available and whether it passes the content filter. If you see a green checkmark, the username is ready to use. If you see a red X, you need to change it.

Once you have a username that passes both checks, you can continue with the rest of the sign-up process (entering your email, password, and birth date). Your username becomes official once you finish creating your account and confirm your email address.

Why you should avoid usernames that reveal personal information

Because your username is public and permanent, avoid including your real name, birth date, phone number, or address. Other players can see your username, and using personal details makes it easier for strangers to identify you outside of Roblox or contact you in ways you did not intend.

A username that is generic or playful — something that does not connect to your real identity — keeps your privacy safer. This is especially important if you are under 18, since younger players benefit from keeping their real-world identity separate from their gaming identity.

Frequently Asked Questions

Can I delete my account and create a new one with a different username?

Yes, you can delete your Roblox account and sign up again with a new username. However, you will lose access to any Robux, game progress, and items you owned on the old account. Roblox does not transfer those things to a new account, so this is only worth doing if you have not invested time or money in your current account.

What if I forget my username?

You can find your username by logging into your account on the Roblox website. Go to your account settings and look for your username in your profile information. If you cannot log in because you forgot your password, use the "Forgot Password" link on the login page to reset it using your email address.

Can someone else use my username if I stop playing?

No. Once you create a username, it belongs to your account permanently. Even if you stop playing for years, no one else can claim that username. Roblox does not recycle usernames or reassign them to new players.

Is my username case-sensitive when I log in?

No. You can type your username in any combination of uppercase and lowercase letters when you log in, and Roblox will recognize it. "MyUsername", "myusername", and "MYUSERNAME" all work the same way.