NBT viewer

Creator notes

NBTviewer NBTviewer is a lightweight client-side NeoForge mod that displays an item’s NBT (SNBT) directly inside its tooltip. It is designed for modders, pack makers, and advanced players who want to inspect, debug, and understand item 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 Optimized to stay readable and performant 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) 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: