Are Roblox Usernames Case Sensitive?

No, Roblox usernames are not case sensitive when logging in or searching for users.

However, there are some important details:

• Display: Usernames can be displayed with specific capitalization (like "CoolPlayer123"), but this is purely cosmetic
• Login: You can type your username in any combination of uppercase and lowercase letters, and it will still work
• Searching: When you search for someone, the capitalization doesn't matter - searching "coolplayer123", "COOLPLAYER123", or "CoOlPlAyEr123" will all find the same account
• Uniqueness: Each username is unique regardless of capitalization, so if "CoolPlayer123" exists, nobody else can create "coolplayer123" or any other variation

So while usernames have a "proper" capitalization that displays on profiles, the system treats all variations the same functionally.