Roblox Character Limits: Username, Display Name & Bio
Roblox sets different length and character rules for your username, display name, and bio. Here is the full breakdown so you know exactly how much room you have — and where fancy fonts and symbols are allowed.
Username
- →Length: 3 to 20 characters.
- →Allowed characters: letters, numbers, and a maximum of one underscore.
- →The underscore cannot be at the very start or very end of the name.
- →No spaces, symbols, or Unicode fonts — usernames must be plain.
- →Changing your username costs 1,000 Robux.
Display Name
- →Length: up to 20 characters.
- →Allowed characters: letters, numbers, spaces, symbols, and Unicode fonts.
- →Free to change once every 7 days.
- →Not unique — multiple players can use the same display name.
Bio (About Section)
- →Length: up to 1,000 characters.
- →Allowed characters: letters, numbers, symbols, emoji, and Unicode fonts.
- →Plenty of room for styled headers, decorative borders, and longer text.
How Unicode Fonts Affect the Limit
Most styled Unicode letters count as a single character, just like normal letters. However, decorative styles that stack combining marks (like Zalgo) or use emoji each count as multiple characters. That means a heavily decorated name can hit the 20-character display name limit faster than it looks.
The generator on this site shows a live character counter for both the display name (20) and bio (1,000) limits, so you can see exactly how much room a style uses before you copy it.
Try the Font Generator
Seeing □boxes instead of letters? That style isn't supported on your current device — just pick another one. Styles marked ✓ Name-safe fit the 20-character display name limit.
Frequently Asked Questions
How many characters can a Roblox username have?
A Roblox username can be 3 to 20 characters long and may only contain letters, numbers, and up to one underscore (not at the start or end).
How many characters can a Roblox display name have?
A Roblox display name can be up to 20 characters. Unlike usernames, display names allow spaces, symbols, and Unicode fonts.
How long can my Roblox bio be?
The Roblox bio (About section) supports up to 1,000 characters, leaving plenty of room for styled text and symbols.
Do fancy fonts use up more characters?
Most Unicode font letters count as one character each. Styles that stack combining marks or use emoji count as several characters, so they fill the limit faster.