What is the format of Minecraft.net account names? Specifically, what characters are permitted or prohibited, what is the maximum length, and are they always treated as case-insensitive?
The username must be 16 characters or less.
The characters permitted are :
Usernames are case-sensitive in games (above your head), but when logging in using the username, whether is it in caps or not, will still work.
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Trying to register with an illegal character gives an error and mentions the following as allowed:
And the longest username I could register was 'thisisalongusern'
protected by fredley♦ Oct 31 '13 at 10:25
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