Display the byte size of an item's NBT data. Packed size displays how large the serialized NBT data is after Minecraft's compression. Raw size displays how large the NBT data is without any processing.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as nbtsize-0.1.1.jar — drop this file into the mods folder
- Download size: 24 KB
- Download link checked 10 Sept 2026 — working
These come from our own check of the pack file, not from the source page.