Backpack Attribute
by TheRedBrain
Backpack Attribute gives players a storage inventory whose size is set by an entity attribute rather than a fixed item, opened with a hotkey.
What it does
Backpack slots are controlled by the backpackattribute:backpack_capacity entity attribute, which adds or removes slots from a default amount. The natural backpack capacity is a server config option, and entity attribute modifiers can change the result. Capacity can be set between 0 and 27 slots, and at 0 the backpack screen will not open. Players are told when they do not have backpack slots.
The backpack screen opens with the hotkey B by default. Items in a backpack slot become inactive when moved out of it, and are dropped at the player's position or destroyed if the config says so. When the inventory is full, the location is announced to the player through a chat message. Several server options decide what happens to the backpack on death, with a setting that mirrors the vanilla keepInventory game rule.
Backpack Attribute needs Fabric API, Fzzy Config and Slot Customization API on Fabric. Inventory Size Attributes adds to it when installed. The mod runs on the client and the server, so both need it. Files exist for 1.20.1, 1.21, 1.21.1, 1.21.11, 26.1, 26.1.1 and 26.1.2, with 4.0.0 for 26.1.2 as the latest file. It is released under the MIT License and is open source.
Key features
Attribute-driven capacity
The number of backpack slots comes from an entity attribute, so modifiers can change it per player.
Hotkey access
The backpack screen opens with the B key by default, and the slot count can reach 27.
Death handling
Server options decide whether backpack items stay with the player on death or are cleared, and the setting can mirror keepInventory.
Optional slot display
A client config option turns off the background texture so only the active slots are shown.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 3
Optional 1
How it compares
Server Backpacks is server-side only, open source under the CC0 1.0 Universal license, and covers 1.17.1 – 1.18.1. Shared Backpack is also server-side only and open source under the MIT License, with files for 1.21.5 – 26.1.2. Bird's Backpacks runs on Fabric and NeoForge with client and server support, released under the MIT License but not open source, for 1.21.8 – 26.1.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Backpack Attribute | Fabric | 1.20.1 – 26.1.2 | Client and server | 2026-04-21 |
| Server Backpacks | Fabric | 1.17.1 – 1.18.1 | Server-side only | 2022-01-23 |
| Shared Backpack | Fabric | 1.21.5 – 26.1.2 | Server-side only | 2026-04-21 |
| Bird's Backpacks | Fabric and NeoForge | 1.21.8 – 26.1.2 | Client and server | 2026-07-29 |
Questions
Does Backpack Attribute need Fabric API?
Must the server have the mod installed?
Which game versions have files?
In the catalog
Backpack Attribute is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 15,189 mods support Minecraft 26.1.2.
More from TheRedBrain
Similar mods
What the author says
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).
Official listing
- Modrinth page
- modrinth.com/mod/backpack-attribute
- Owner
- TheRedBrain
- Published
- 2024-05-02
- Updated on Modrinth
- 2026-04-21
- Facts verified
- 2026-10-15