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NBT viewer

NBT viewer

NBT Viewer lets you inspect item NBT data at a glance by displaying it directly in tooltips, making debugging and mod development easier.

2,121
11
2,121
11

Compatibility

Minecraft: Java Edition

1.21.10–1.21.11
1.21.6
1.21.4
1.21.1

Platforms

Supported environments

Client-side

Tags

Creators

Details

Licensed MIT
Published 5 months ago

NBTviewer

NBTviewer is a lightweight client-side NeoForge mod that displays NBT (SNBT) data directly in-game.

It is designed for modders, pack makers, and advanced players who want to inspect, debug, and understand data instantly — without commands or external tools.

Main Features

NBT directly in tooltips

  • Displays the full SNBT of the hovered item directly in its tooltip

Entity NBT overlay

  • Press N to toggle entity NBT display while looking at entities
  • Displays key entity data directly on the player HUD
  • Works seamlessly alongside item tooltips

Entity lock system

  • Shift + L to lock the currently targeted entity
  • Keeps displaying its NBT even when not looking at it anymore

Advanced entity NBT viewer

  • Shift + O to open a clean and scrollable interface
  • Better readability for large and complex NBT structures
  • Includes a copy button for quick access

Hold SHIFT to show (optional)

  • By default, NBT is only shown while holding SHIFT
  • Optional hint line when SHIFT is not held

Syntax highlighting (HEX colors)

  • Keys
  • Strings
  • Numbers
  • Booleans
  • Punctuation ({ } [ ] , :)
  • Identifiers

All colors are configurable using HEX format (#RRGGBB).

Formatting modes

  • Single-line: compact raw SNBT on one line
  • Multi-line: formatted with indentation and line breaks

Includes safety limits to avoid excessively large tooltips.

Safe truncation & limits

  • Maximum total character count
  • Maximum line length
  • Configurable indentation size

Tooltip scaling

  • Auto-scale: adapts to NBT size and line count
  • Manual scale: fixed size (ignored when auto-scale is enabled)

Copy NBT to clipboard

  • Press CTRL + SHIFT + C to copy item SNBT
  • Optional feedback:
    • Small popup confirmation
    • Optional local sound effects (client-side only)

Configuration

  • SHIFT-only display
  • Single-line or multi-line formatting
  • Tooltip hint lines
  • Tooltip size limits
  • Indentation spacing
  • Auto-scale or manual scale
  • Clipboard popup and sounds
  • Full HEX color customization

Multiplayer

  • Client-side only
  • No server installation required
  • No network traffic
  • Only affects local tooltips

Language Support

  • English
  • French
  • German
  • Spanish
  • Italian
  • Portuguese (Brazil)