A good Roblox username is short, easy to read, and unique to you. It needs to be 3 to 20 characters long, can use letters, numbers, and a single underscore (not at the start or end), and can’t include spaces or anything that breaks Roblox’s community rules. Since changing your username later costs Robux, while your display name can be changed for free, it pays to pick a username you’ll be happy with for years and use the display name for anything more playful.
Below are the rules, ideas for finding a name that isn’t taken, safety tips, and how to change your name later.
Roblox username rules
| Rule | Details |
|---|---|
| Length | 3 to 20 characters |
| Allowed characters | Letters (A to Z), numbers, and one underscore |
| Underscore placement | Not at the beginning or end |
| Spaces and symbols | Not allowed |
| Uniqueness | Can’t match another account’s username |
| Content | Filtered for inappropriate words and personal information |
Username vs. display name
Your username is your unique account ID: you use it to log in, and friends use it to find you. Your display name is what usually appears above your avatar in experiences and on your profile. Display names don’t have to be unique and can be changed for free, with a waiting period between changes. Usernames cost Robux to change, and other players can still see your previous usernames through People search.
How to choose a username
- Start with things you like. Hobbies, favorite animals, colors, foods, or a game style (builder, racer, explorer) are great starting points.
- Combine two words. Pairs like an adjective and a noun (for example, “QuietComet” or “PixelFox”) are memorable and more likely to be available.
- Keep it easy to type and say. Friends should be able to search for you without asking how it’s spelled.
- Use capital letters for readability. “SkyBuilder” is easier to read than “skybuilder.”
- Add a short number only if needed. Avoid your birth year or age, since that reveals personal information.
- Think long term. A name that feels funny now may feel awkward in a few years.
Ideas to get you started
- Nature: StormRiver, MossyTrail, NovaPine
- Space: OrbitDash, StarTinker, LunarByte
- Gaming style: BlockArchitect, SpeedRunner_X, ObbyMaster
- Cute: MochiCloud, PuddleBun, HoneyNook
- Cool: ShadowGlint, VoltRaven, IronEcho
These are examples to inspire you; many will already be taken, so mix and match words until you find something original.
What if the name is taken?
- Swap one word for a synonym (Comet becomes Meteor or Starfall).
- Rearrange the words (PixelFox becomes FoxPixel).
- Add a meaningful short word, such as “Is,” “The,” or “Of.”
- Use the single allowed underscore to separate words.
- Avoid strings of random numbers, which make names hard to remember.
How to check if a username is available
The sign-up form checks names as you type and tells you right away if one is taken or not allowed, so you can try several ideas quickly. If you already have an account, the username change screen in Settings works the same way and checks availability before you spend any Robux. You can also search for a name in the People search to see whether someone is using it. Keep a short list of three or four favorites before you start, so you’re not choosing under pressure.
Stay safe with your username
- Don’t use your real full name, school, town, or birthday.
- Don’t reuse a username or password from other accounts.
- Avoid names that imitate Roblox staff, famous creators, or other players.
- Parents can review account settings together with younger players and use Roblox’s parental controls.
How to change your Roblox username
- Log in and open Settings (the gear icon on the website, or More in the mobile app).
- Select the Account Info tab.
- Click the pencil icon next to your username.
- Enter the new username and your current password.
- Confirm the purchase with Robux.
Your account creation date, items, and friends stay the same. You can switch back to an old username later, but that also costs Robux.
How to change your display name
Go to Settings > Account Info and click the pencil icon next to Display Name. Enter the new name and save. Display names follow similar content rules and can be changed again after a short waiting period.
Related: How to clear the Roblox cache on Windows 10.
Related: How to update Roblox on Windows.
Frequently asked questions
Can I change my Roblox username for free?
No, username changes cost Robux. Display names can be changed for free.
Why does Roblox say my username isn’t appropriate?
Roblox’s filter blocks words it considers inappropriate or personal, and sometimes catches innocent combinations. Try a different word order or spelling.
Can I use a username someone else had before?
Not if it’s still in use by another account. Previously used names may remain unavailable.
Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.