Generate UUIDs for Minecraft players or convert usernames to UUIDs.
/give @p minecraft:diamond_sword{display:{Name:'{"text":"Example Sword"}'}}
/teleport @a[name=PlayerName] ~ ~ ~
/give @a[nbt={UUID:[I;12345,67890,12345,67890]}] minecraft:diamond
In Minecraft, UUIDs (Universally Unique Identifiers) are used to identify players regardless of username changes. They're important for:
Minecraft uses standard UUID version 4 (random) format, which can be represented with or without dashes depending on the context.