MCWorldTools Single Player Editor

What MCWorldTools Single Player Editor is

MCWorldTools Single Player Editor is a free browser-based tool for editing player data in Minecraft Java Edition singleplayer worlds. It can change health, hunger, XP, inventory, armor, Ender Chest contents, and position in a level.dat file. The workflow is to edit the file in the browser, download the modified version, then manually replace the original with Minecraft closed. Files can be up to 10MB. The editor is for singleplayer worlds that keep player data in level.dat; server player data uses a separate editor. Position changes cover X, Y, and Z coordinates, but not rotation or dimension. Recovering items lost in hardcore requires a pre-death level.dat backup, although items can be added manually. Unknown NBT tags are preserved for modded player data. MCWorldTools says world files are processed in the browser and are not uploaded, stored, or accessible to the site. Its privacy policy says a player UUID is sent to show the associated username and skin, while save-file contents remain local. The tool runs in a browser without downloads and costs nothing.

Who it suits

This editor suits Minecraft Java Edition players who want to change player data in a singleplayer level.dat file. It is also relevant to modded worlds because unknown NBT tags are preserved.

Limits

The free plan accepts files up to 10MB and is for singleplayer worlds with player data in level.dat. Position editing does not include rotation or dimension; recovering hardcore-lost items requires a pre-death backup unless you add items manually.

Getting started

1. Open the Single Player Editor in a browser; no download is required.
2. Upload the level.dat file from a singleplayer world.
3. Edit the player data fields you need.
4. Download the modified file.
5. With Minecraft closed, manually replace the original level.dat file.

Verdict

The editor covers several player-data fields and preserves unknown NBT tags, but works only with singleplayer data stored in level.dat. Its file workflow requires a manual replacement with Minecraft closed.