The mobile path is different from the desktop version

Changing your Roblox username on a phone or tablet works, but not through the main Roblox app. You have to use a web browser instead — either Safari on iPhone or Chrome on Android — because the mobile app doesn't include the account settings where username changes happen. The process takes about five minutes and costs 1,000 Robux (Roblox's in-game currency) each time you do it, unless you've never changed your username before, in which case the first change is free.

You'll need to be logged into your Roblox account and have enough Robux in your account if you're not making a free first change. If you don't have enough Robux, you can buy more through the mobile app or browser before you start the username change.

Key Takeaways

  • Open a web browser on your phone (not the Roblox app) and go to the Roblox website to access account settings.
  • Your first username change is free; any change after that costs 1,000 Robux.
  • The username change takes effect when ready, but you can only change it once every seven days.
  • If you forget your username or can't log in, you'll need to recover your account through the Roblox website before you can change it.

Step-by-step: changing your username in a mobile browser

Open Safari (iPhone) or Chrome (Android) and go to www.roblox.com. Log in with your email address and password if you're not already logged in. Once you're on the home page, tap the three horizontal lines (the menu icon) in the top left corner of the screen.

Scroll down and tap "Settings." Then tap "Account." Look for the line that says "Username" — it will show your current username next to it. Tap on that line. A text box will appear with your current username highlighted. Delete it and type your new username. Roblox will tell you right away if the name is already taken or if it breaks the naming rules (no numbers at the start, no special characters except underscores, and it has to be between 3 and 20 characters long).

If your new username is available, you'll see a green checkmark. Tap the button to confirm the change. If this is your first username change, it will go through when ready at no cost. If you've changed your username before, you'll be asked to confirm that you want to spend 1,000 Robux. Tap yes, and the change is done.

What happens if you don't have enough Robux

If you try to change your username and don't have 1,000 Robux in your account (and it's not your first change), Roblox will stop you at the confirmation screen and show you how many Robux you need. You can buy more Robux through the mobile app or through the browser before you try again.

To buy Robux on mobile, open the Roblox app, tap the Robux icon (it looks like a coin with an R on it) at the bottom of the screen, and follow the prompts. You'll be asked to choose how many Robux you want and to confirm your payment method. The Robux will show up in your account within a few minutes.

The seven-day waiting period between changes

Once you change your username, you can't change it again for seven days. This rule applies whether you paid for the change or got it free. If you try to change it before seven days have passed, Roblox will tell you the exact date and time when you'll be able to change it again.

This waiting period exists to prevent people from switching usernames constantly to avoid consequences for bad behavior in games. It also gives you time to make sure you actually like your new username before you can switch again.

Usernames that won't work and why

Roblox has rules about what usernames can contain. You can't start a username with a number, use spaces, or use special characters except underscores. The name has to be between 3 and 20 characters long. Roblox also blocks usernames that contain profanity, slurs, or references to real people's names or brands without permission.

If you type in a username and Roblox rejects it, the site will tell you why — usually "unavailable" (someone else has it), "inappropriate" (it breaks the content rules), or "invalid" (it breaks the format rules). Try a different name and check again.

If you're locked out of your account

If you can't log in to your account on mobile, you won't be able to change your username until you get back in. Go to www.roblox.com in a browser, tap "Log In," and then tap "Forgot password or username?" at the bottom. Roblox will ask you for the email address connected to your account and will send you a link to reset your password.

Check your email (including spam folders) for the reset link. Tap it, create a new password, and log back in. Once you're in, you can follow the steps above to change your username.

Frequently Asked Questions

Can I change my username through the Roblox mobile app?

No. The Roblox app doesn't have the account settings page where username changes happen. You have to use a web browser like Safari or Chrome to go to www.roblox.com and change it there, even though you're on a phone or tablet.

What if someone else took the username I want?

Usernames on Roblox are first-come, first-served. If someone else has the name you want, you can't use it. Try adding a number or underscore to make it unique, or pick a different name. You can't ask Roblox to take a username away from someone else.

Do I lose my games, friends, or Robux if I change my username?

No. Your username is just the name people see. Everything else — your games, your friends list, your Robux, your inventory — stays exactly the same. Only the name changes.

How long does it take for my new username to show up everywhere?

Your new username shows up when ready in your account settings and in games. It might take a few minutes to update on other players' friend lists or in chat, but usually it's when ready.

Can I change my username back to what it was before?

Yes, but only if no one else has claimed it in the meantime. If someone took your old username, you can't get it back. You'd have to pick a different name.