Enter the username idea you want to check.
Free, privacy-first
Roblox Username Rules Checker
Check whether a Roblox username idea looks structurally valid, count the characters, and generate a cleaner local variant without querying live availability.
Username input
Format check
The result focuses on structure only, so you can improve the username idea first before you ever check live availability elsewhere.
Good use cases
A good fit when you are brainstorming a new account name, renaming a community-facing bot account, or cleaning up a username idea before a manual availability check.
- Count characters quickly.
- Flag invalid symbols or underscore patterns.
- Generate a cleaned local variant when the original input is messy.
How to use the result
The most important line is the overall format status, but the individual checks make it easier to fix one problem at a time.
- Character count helps you stay inside the usual Roblox-style length range.
- Underscore checks catch patterns that often make a name look invalid or awkward.
- Readability notes are modest local guidance, not proof that one name will perform better than another.
- The cleaned candidate is only a convenience draft, not a guaranteed valid or available username.
Paste the username idea exactly as you are considering it, then decide how aggressive the cleanup helper should be.
Choose whether the cleanup helper should preserve case, clean the string, or also lowercase it.
Review the format result, character count, and any warnings.
Use the cleaned candidate as a local draft only, then verify availability separately if needed.
Typical username checks
Each example loads into the tool and runs, so the stated result is exactly what you will see.
Check a clean creator-style name
Test a name that already uses allowed characters and a reasonable length.
Sample inputs
- Username
- Creator_Builds
- Cleanup mode
- Clean invalid characters
Result: Format status: Looks valid. 14 characters, 1 underscore, allowed characters only, no readability flags. The cleaned candidate is unchanged: Creator_Builds. No warnings.
An accented name with a space
See how diacritics and spaces are handled, since neither is allowed in a Roblox username.
Sample inputs
- Username
- café Niño
- Cleanup mode
- Clean invalid characters
Result: Format status: Needs changes — accented letters and the space are not allowed characters. Cleaned candidate: cafe_Nino (accents transliterated, the space bridged with an underscore).
The cleaned candidate is a formatting-valid draft, not an availability check.
Valid characters but doubled underscores
A name that uses only allowed characters can still fail on underscore spacing.
Sample inputs
- Username
- Pro__Gamer_2024
- Cleanup mode
- Clean invalid characters
Result: Format status: Needs changes — two underscores in a row are not allowed. Cleaned candidate: Pro_Gamer_2024 (the doubled underscore collapsed to one). A heavy-underscore readability hint also appears.