How do I find my Minecraft UUID?

Enter your Minecraft username in the lookup tool above. The tool queries the Mojang API and returns your UUID instantly. You can also find it in your Minecraft launcher profile or in the usercache.json file on your server.

Why do server plugins use UUIDs instead of usernames?

UUIDs are permanent while usernames can be changed. Plugins like permissions managers, economy plugins, and ban systems use UUIDs to track players reliably even after a username change.

What is the difference between online and offline mode UUIDs?

Online mode UUIDs are assigned by Mojang and are globally unique. Offline mode UUIDs are generated locally from the username and are used on servers with online-mode=false. They are different values for the same username.

Minecraft UUID Lookup

Find any player's UUID from their username

Username to UUID

UUID to Username

What is a Minecraft UUID?

A UUID (Universally Unique Identifier) is a unique ID assigned to every Minecraft account. Unlike usernames, UUIDs never change, even if a player changes their name. This makes UUIDs essential for server plugins to track players reliably.

UUID Formats

Minecraft UUIDs come in two formats:

Full UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx (with dashes)
Trimmed UUID: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (without dashes)

Most server plugins accept both formats.

Why Use UUIDs?

Persistent Identity: UUIDs stay the same even when players change their username
Server Bans: Ban players by UUID so they can't bypass by changing names
Plugin Data: Store player data reliably across name changes
Whitelist: Use UUIDs in whitelist.json for reliable player identification

Offline Mode vs Online Mode

Servers running in "offline mode" (cracked servers) generate UUIDs differently. These UUIDs are based on the username and will change if the player changes their name. Online mode servers use the official Mojang UUID which is permanent.

API Access

Need to look up UUIDs programmatically? Use the Mojang API directly:

GET https://api.mojang.com/users/profiles/minecraft/{username}

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