Minecraft UUID Lookup
Look up a Java Edition player's UUID from their username, or resolve a UUID back to a username — useful for whitelist entries, bans, and player-data files.
Lookup
Enter a username or UUID to begin
Why UUIDs matter
Minecraft accounts are tracked internally by a UUID, not a username — so a player's name can change without losing their inventory, permissions, or ban status. Whitelist and ban files (whitelist.json, banned-players.json) store both for exactly this reason.