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SPECIFICTION
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LiveNBTEditor

github.com

Free plan WindowsLinuxAPI
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Spec score 8.3 #5 of 35 in Minecraft World Editors

What it is

LiveNBTEditor edits Minecraft NBT data while a game is running, applying validated changes on the next game tick instead of requiring file editing or a world reload. A Java agent runs a WebSocket server, and a Windows desktop editor connects to it; the agent can run where Minecraft runs, including Linux dedicated servers. The project says it works with vanilla Minecraft without a mod loader. The editor can change player data and world settings such as gamerules, time, weather, spawn, world border, and difficulty. It includes live watches, deep search, SNBT editing, clipboard support, keyboard shortcuts, undo, and redo. It can edit all 41 player inventory slots, with searchable item and enchantment pickers based on the bundled Minecraft 26.3 registry. SNBT can be copied and pasted with NBT Studio. The project specifies Minecraft Java 26.3 and says other versions are unsupported. The agent binds to loopback by default and requires a per-install token, but the WebSocket connection is unencrypted. LiveNBTEditor is free and MIT-licensed; its README warns that live edits can corrupt data and recommends backing up important worlds.

Spec sheet

Purpose
LiveNBT edits Minecraft NBT in a running game, with changes applied on the next tick.Read 8 Oct 2026 · github.com
Intended users
The project describes itself as a tool for editing your own single-player game or a server you control and recommends backing up important worlds.Read 8 Oct 2026 · github.com
Platforms
The editor is a Windows desktop app; its Java agent can run on Linux dedicated servers.Read 7 Oct 2026 · github.com
Integrations
SNBT copy and paste round-trips with NBT Studio, and the agent works with vanilla Minecraft without Fabric, Forge, or another mod loader.Read 8 Oct 2026 · github.com
Security
The agent binds to loopback by default and requires a per-install token; the maker advises LAN-only use because the WebSocket connection is unencrypted.Read 7 Oct 2026 · github.com
License
The repository identifies the software as MIT licensed.Read 8 Oct 2026 · github.com
Compatibility limit
The README specifies Minecraft Java 26.3 and says other versions are unsupported.Read 7 Oct 2026 · github.com
Components
The product pairs a Java agent that runs a WebSocket server with a Windows desktop editor.Read 8 Oct 2026 · github.com
Connection security
The agent binds to loopback by default and requires a per-install token; the project advises using a firewall or SSH tunnel for remote connections because the WebSocket connection is unencrypted.Read 8 Oct 2026 · github.com
Download
The v0.5.0 release offers a standalone Windows app, a Windows installer, and a Java agent JAR for dedicated servers; the executables are unsigned and may prompt a SmartScreen warning.Read 8 Oct 2026 · github.com
Editor features
The editor includes live watches, deep search, undo and redo, SNBT editing, and inventory editing.Read 7 Oct 2026 · github.com
Editor tools
Features include live watches, deep search, SNBT editing and clipboard support, keyboard shortcuts, and undo and redo.Read 8 Oct 2026 · github.com
Input validation
The project says edits are checked against the real NBT type and invalid values are rejected before being written to the save.Read 8 Oct 2026 · github.com
Integration
SNBT copy and paste can round-trip with NBT Studio.Read 7 Oct 2026 · github.com
Inventory
It can edit a player's 41 inventory slots and provides searchable item and enchantment pickers from the bundled Minecraft 26.3 registry.Read 7 Oct 2026 · github.com
Inventory editing
It supports editing all 41 player inventory slots and includes searchable item and enchantment pickers backed by the Minecraft 26.3 registry.Read 8 Oct 2026 · github.com
Live editing
Edits are validated against the NBT type and applied on the next game tick.Read 7 Oct 2026 · github.com
Player and world editing
The editor can change player data and world settings such as gamerules, time, weather, spawn, world border, and difficulty.Read 8 Oct 2026 · github.com
Support and risk
The README warns that live NBT editing can corrupt data and recommends backing up important worlds.Read 7 Oct 2026 · github.com
Supported environments
The editor runs on Windows, while the Java agent can run where Minecraft runs, including Linux dedicated servers.Read 8 Oct 2026 · github.com
Supported game version
The project supports Minecraft Java 26.3 and states that other versions are unsupported.Read 8 Oct 2026 · github.com

Plans and prices

LiveNBT Free MIT-licensed software · Minecraft Java 26.3 only · Windows editor required Read 8 Oct 2026 · github.com

Every LiveNBTEditor plan and price →

Strong points and limits

Strong points

  • Applies validated edits on the next game tick.
  • Works without a mod loader.
  • Supports all 41 player inventory slots.
  • Includes undo and redo.
  • MIT-licensed and free.

Limits

  • Only Minecraft Java 26.3 is supported.
  • The editor requires Windows.
  • WebSocket connections are unencrypted.
  • Live edits can corrupt data.

Who it suits

LiveNBTEditor suits people editing their own single-player game or a server they control, provided they use Minecraft Java 26.3. The Windows editor and unencrypted WebSocket connection are important constraints for remote use.

Verdict

LiveNBTEditor provides in-game editing tools for player data, inventories, and world settings, with explicit game-version support. Use it only with the stated version, protect remote connections as advised, and back up important worlds.

Where Specifiction places it

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