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)
