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NBT Viewer

by marioandweegee3

NBT Viewer is a Fabric mod for inspecting the NBT data stored in items, opened from a key bind.

FabricClient-side onlyMIT LicenseOpen source1.15 – 1.20.1

What it does

A player holding an item opens the NBT Viewer GUI by pressing a key that can be reassigned, and it is Right ALT out of the box. Inside the screen, key-value pairs for the element's data are shown, with lists indexed by position and object keys sorted by name. Elements are represented by a button, and the types of values, such as lists, objects or nothing, are labeled. NBT Viewer runs on the client alone, so only the player installing it needs the mod. It is published for Fabric, for 1.15 – 1.20.1, and is open source under the MIT License.

Key features

  1. Item NBT inspection

    The viewer shows the NBT data attached to items, so players can read what a stack holds without a command.

  2. Key-value display

    Data appears as key-value pairs, with list entries shown by index and object keys sorted by name.

  3. Configurable key bind

    The key that opens the GUI is set in the controls options, and Right ALT is the default.

Compatibility

Latest build for each game version and loader.

1.20.13.0.0
1.18.12.0.0
1.15.21.0.0
1.15.11.0.0
1.151.0.0
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

Questions

Does NBT Viewer need to be on the server?

No. Servers do not need it; each player installs it for their own game.

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Tough Glass1.18.2 – 1.20.1

What the author says

There is a configurable key bind - Right ALT by default - which opens the NBT Viewer GUI. Inside the GUI, there will be key-value pairs for each element of the data. For Lists, the index in the list is the key.
marioandweegee3, on the Modrinth page

Official listing

Owner
marioandweegee3
Published
2022-01-26
Updated on Modrinth
2023-06-15
Facts verified
2026-10-15
Open on ModrinthCompare