All tools
Player identity
Offline UUID Generator
Compute the offline (cracked) UUID for a Minecraft username, and compare it to the online Mojang UUID.
On an offline (cracked) server a player's UUID does not come from a Mojang account; it is a deterministic hash of their name: the v3 UUID of "OfflinePlayer:<name>". Admins need this value to set permissions, bans, or data folders before a player first joins.
The offline UUID is case-sensitive and computed from the exact UTF-8 bytes of the name as typed. Everything runs in your browser, no network.
Enter a username to compute its offline UUID.