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Minecraft username rules: length, characters and blocked names
Every Minecraft: Java Edition account has exactly one username, and every username follows the same short set of rules. Knowing them saves you from chasing names that can never be yours, and explains a few answers of the name checker that look strange at first.
Length: from 3 to 16 characters
A username has at least three characters and at most sixteen. Nothing shorter exists: a two-letter name is not rare, it is impossible, and anyone offering one is offering something that is not a Java Edition name. That minimum is also why three-character names matter so much. There are only 50,653 of them, the smallest set there will ever be, and almost all of them have an owner.
At the other end, sixteen characters is plenty for a readable name, and names that long are almost always free. Length is the main reason a name is easy or hard to get: every character you add multiplies the number of possible names by 37.
Characters: letters, digits and the underscore
Only 37 characters are allowed: the 26 letters of the English alphabet, the ten digits and the underscore (_). No spaces, no hyphens, no dots, no accented letters and no symbols. A name such as José or dark-knight cannot be a Java username; the closest you can get is Jose or dark_knight.
The underscore is the only separator there is, so players use it the way others use a space. It is also a common trick to reach a name that is taken: _Steve or Steve_ are different names from Steve. They are easier to get for the same reason they are worth less to collectors, as the article on OG names explains.
Capitals do not make a different name
A username is shown with the capitals its owner chose, but two names that differ only in capitals are the same name. If someone has Notch, nobody else can have notch or NOTCH. That is why the checker answers the same thing whatever capitals you type, and why a drop is listed in lower case: the name that drops is every way of writing it at once.
The owner of a name can change how it is capitalised. Whoever claims a name after a drop chooses the capitals again, so a name may come back written differently from how it was before.
One account, one name; one name, one account
On Java Edition a name belongs to exactly one account at a time, worldwide. There are no servers or regions with their own copy of a name, and there is no number added at the end to tell two players apart. That uniqueness is what makes a name worth waiting for, and it is why a name only becomes free when the account that has it lets it go: by changing to another name. The rules of that change, and the 37 days the old name stays reserved, are in the guide to name drops.
Behind the name every account also has a UUID, a long identifier that never changes. Servers, mods and tools use the UUID to recognise a player, which is how they keep knowing who you are after you rename. The name is what people see; the UUID is what the game uses.
Names nobody has but nobody can take
Some names have no owner and still cannot be claimed. Mojang does not allow names that contain offensive words, and it keeps some names back for its own reasons. When you ask for one of those, the name change page refuses it even though no account has it. The checker shows them as blocked: they are not waiting to drop, and there is no point in watching them.
A name that has just been left by its owner can also look free while it is still reserved. During those 37 days only time makes it claimable. If the checker shows a name as dropping soon, that is the case, and the answer comes with the window we expect it in.
Java names and Bedrock gamertags
Everything above is about Minecraft: Java Edition. Bedrock Edition does not use these names at all: it shows your Xbox gamertag, which follows Xbox rules, can contain spaces and is changed on the Xbox side. A name you see on Bedrock tells you nothing about whether the same name is free on Java. Java and Bedrock names goes into the differences.
A quick checklist before you chase a name
- Is it between 3 and 16 characters, using only letters, digits and underscores?
- Does the checker show it as taken, dropping soon or available, and not as blocked?
- If it is taken, how often does its owner change names? Its name history gives you an idea.
- Can your own account change its name when the time comes, or did you change it in the last 30 days?
