Minecraft UUID Converter

Convert Minecraft usernames to UUIDs and back. View skin previews using the Mojang API.

Minecraft Username

Minecraft UUID Converter

Every Minecraft Java Edition player has a unique UUID (Universally Unique Identifier) assigned by Mojang. This UUID is permanent — it doesn't change even if a player changes their username.

Why UUIDs Matter

Server permissions: Most Minecraft server plugins (LuckPerms, Essentials, etc.) use UUIDs to track players, not usernames.
Ban systems: IP and UUID bans persist across username changes.
Whitelists: Modern whitelists use UUIDs so players can be whitelisted even if they change names.
Plugin data: Player data files are named by UUID.

UUID Format

A Minecraft UUID is a standard v4 UUID: 32 hexadecimal characters arranged as 8-4-4-4-12 with dashes, for example: 069a79f4-44e9-4726-a5be-fca90e38aaf5 (Notch's UUID).

Every Minecraft Java Edition player has a unique UUID (Universally Unique Identifier) assigned by Mojang. This UUID is permanent — it doesn't change even if a player changes their username.

Why UUIDs Matter

Server permissions: Most Minecraft server plugins (LuckPerms, Essentials, etc.) use UUIDs to track players, not usernames.
Ban systems: IP and UUID bans persist across username changes.
Whitelists: Modern whitelists use UUIDs so players can be whitelisted even if they change names.
Plugin data: Player data files are named by UUID.

UUID Format

A Minecraft UUID is a standard v4 UUID: 32 hexadecimal characters arranged as 8-4-4-4-12 with dashes, for example: 069a79f4-44e9-4726-a5be-fca90e38aaf5 (Notch's UUID).