UUID Data Loader
by Vakr
UUID Data Loader lets several players share one singleplayer world while each keeps their own player data.
What it does
Vanilla Minecraft keeps a singleplayer world owner's player data inside level.dat, which means a world handed to someone new can load the earlier owner's inventory and location for that person. Players can then pass a world around without the data mixing up. Back up worlds before using it. The file is published for NeoForge 1.21.1 only, is server-side only, and is not open source; it is released under All rights reserved.
Key features
Per-player data loading
On join, the mod loads the data file that matches the current player's UUID from the world's playerdata folder.
Shared world handover
A world can move between players without a new owner inheriting another player's inventory or position.
Separate data kept intact
Each player's data stays in its own file, so another player's data is not overwritten by loading a world.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
In the catalog
UUID Data Loader is one of 36,990 Utility mods on ModsFinder, and one of 13,477 Utility mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
Shared Player Data allows multiple players to safely share and pass around the same Minecraft singleplayer world without accidentally loading another player's data. Minecraft normally stores the singleplayer owner's player data in level.dat. When a world is given to another player, this can cause the new owner to…
Official listing
- Modrinth page
- modrinth.com/mod/uuid-data-loader
- Owner
- Vakr
- Published
- 2026-08-18
- Updated on Modrinth
- 2026-08-18
- Facts verified
- 2026-10-15