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Visual Data SIze project artwork

CurseForge · Minecraft mod

Visual Data SIze

A client-side mod that displays the exact byte-size and nested tag count of items in advanced tooltips.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Visual Data SIze release matches 26.3?

Updated 27 days ago
Best match for your filters Visual data size-1.3.1.jar
Game version 26.3
Loader Fabric

Visual data size-1.3.1.jar targets 26.3 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.

Where it goes

Is Visual Data SIze required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Visual data size-1.3.1.jar need?

Visual data size-1.3.1.jar on 26.3. Every mod below is checked against that same setup.

All 1 required mods have matching files

Install Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.

2 listed on this file 1 pulled in by one of those mods
Fabric API Needed by Visual data size-1.3.1.jar
required
Matching file found Matched file: [26.3] Fabric API 0.166.0+26.3
Mod Menu Optional for Visual data size-1.3.1.jar
optional
Matching file found Matched file: v21.0.0 for 26.3

1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add Visual Data SIze without breaking your instance.

Built for Visual data size-1.3.1.jar on 26.3. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use Visual data size-1.3.1.jar. It targets 26.3 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install Fabric API first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.

  3. 03

    Put it on the correct side

    The project page does not say whether this file belongs on the client, dedicated server, or both.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside Visual data size-1.3.1.jar. It opens that exact file at the source.

About this project

What does Visual Data SIze add?

Visual Data Size

Visual Data Size is a lightweight, purely client-side diagnostic tool for Minecraft 26.3. It makes the serialized data size and internal structure of items visible directly in your inventory tooltips.

Whether you are a mod developer checking item data, a server administrator investigating large item structures, or simply interested in the technical side of Minecraft, Visual Data Size gives you a quick way to inspect item data at a glance.

Key Features

  • Exact Data Measurement: Measures the serialized data size of the current item or full stack in Bytes (B), Kibibytes (KiB), or Mebibytes (MiB).
  • Structural Tag Counter: Counts tags and nested data stored inside an item, including complex items such as filled Shulker Boxes, books, and modded items with custom data.
  • Container Support: Nested item data is included in the measurement, making it useful for inspecting items such as Shulker Boxes and other container items.
  • Custom Item Support: Persistent data from modded items and custom data components is included when it is part of the item's serialized data.
  • Live In-Game Commands: Toggle the display and change the size format directly from chat using simple client-side commands with Tab completion.
  • No Cache: The current ItemStack is measured again when needed, so changes to the item's data are reflected immediately.
  • 100% Client-Side: Runs entirely on your client. No server-side installation or admin permissions are required.
  • Vanilla-Style Tooltip: The additional information uses the same simple dark-gray style as Minecraft's advanced tooltip data.

How to Use

  1. Place the generated .jar file into your Fabric mods folder.
  2. Start Minecraft 26.3.
  3. Join a multiplayer server or open a singleplayer world.
  4. Press F3 + H to enable Minecraft's Advanced Tooltips.
  5. Hover over an item to see its serialized data size and tag count at the bottom of the tooltip.

Chat Commands

Use /visualdatasize to configure the mod. All commands support Tab completion.

  • /visualdatasize toggle — Turns the tooltip display ON or OFF.
  • /visualdatasize format smart — Automatically chooses a readable size unit.
  • /visualdatasize format bytes — Shows the exact size in Bytes.
  • /visualdatasize format kib — Shows the size in KiB.
  • /visualdatasize format mib — Shows the size in MiB.
  • /visualdatasize format bits — Shows the size in Bits.

Example Tooltip Output

The exact value depends on the item and its serialized data.

Size: 42 B (Tags: 3)

Project description from CurseForge.

Pick your setup

Visual Data SIze by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Visual Data SIze versions and loaders

1 of 1 releases match

Looking for an older file? The official CurseForge project page is in Resources.

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