CurseForge · Minecraft mod
Backpack Attribute
An unconventional backpack mod using an entity attribute.
Quick answer
Which Backpack Attribute release should I use?
Backpack Attribute backpack-attribute-4.0.0.jar targets 26.1, 26.1.1, 26.1.2 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 4 required mods have matching files.
Where it goes
Is Backpack Attribute required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Backpack Attribute backpack-attribute-4.0.0.jar need?
backpack-attribute-4.0.0.jar. Change the file and its required mods may change too.
Install Slot Customization API, Fabric API, Fzzy Config, Fabric Language Kotlin first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
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 Backpack Attribute without breaking your instance.
Built for Backpack Attribute backpack-attribute-4.0.0.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use backpack-attribute-4.0.0.jar. It targets 26.1, 26.1.1, 26.1.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Slot Customization API, Fabric API, Fzzy Config, Fabric Language Kotlin first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside backpack-attribute-4.0.0.jar. It opens that exact file at the source.
About this project
What does Backpack Attribute add?
Backpack Attribute
This is a different approach to a backpack in Minecraft. No backpack items are added, the backpack can be accessed at any time (depending on the config settings).
The player can open the new backpack screen via a hotkey (B by default).
The minimum amount of slots is 0, in which case the backpack screen won't open. The player gets notified that they currently don't have backpack slots.
The maximum amount of slots is 27.
Configuration
The value "default_backpack_slot_amount" in the server config file controls the amount of backpack slots each player has by default.
The entity attributes "generic.backpack_capacity" controls how many slots are added to/removed from the default amount. This is 0 by default, but with entity attribute modifiers (EAMs) it can be changed.
The background texture of disabled slots is not shown. This can be disabled in the client config.
"What happens to items in my backpack when my backpack gets smaller?"
When a backpack slot contains an item and becomes inactive, that item is moved to the normal inventory or dropped at the players location, when the inventory is full. This is announced to the player via a chat message.
"What happens to items in my backpack when I die?"
Two new game rules control what happens in the case of player death.
"keepBackpackInventory" defaults to false.
"clearBackpackInventoryOnDeath" defaults to false.
When "keepBackpackInventory" is set to true, the items stay in the backpack. This is similar to the vanilla gameRule "keepInventory".
When "keepBackpackInventory" is set to false, two outcomes are possible:
- When "clearBackpackInventoryOnDeath" is true, the items are destroyed.
- When "clearBackpackInventoryOnDeath" is false, the items are dropped on the players position.
Mod Compatibility
The backpack screen will not show disabled inventory slots, when "Inventory Size Attributes" is installed.
Project description from CurseForge.
Pick your setup
Backpack Attribute by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.1
1 loader build1.21
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Backpack Attribute versions and loaders
backpack-attribute-4.0.0.jar
21 Apr 2026
4.0.0
backpack-attribute-4.0.0.jar
21 Apr 2026
3.0.0
backpack-attribute-3.0.0.jar
2 Mar 2026
backpack-attribute-2.2.0.jar
22 Dec 2024
backpack-attribute-2.1.0.jar
9 Sept 2024
backpack-attribute-1.1.0.jar
12 Jul 2024
2.0.0
backpack-attribute-2.0.0.jar
14 Jun 2024
1.0.0
backpack-attribute-1.0.0.jar
12 May 2024
Looking for an older file? The official CurseForge project page is in Resources.