AggStack
by _375_
AggStack groups stacks of the same item ID that differ in NBT data, such as durability, enchantments or custom names, into one inventory slot.
What it does
Normally a damaged or enchanted tool takes its own slot, and identical-looking items with different data cannot merge. AggStack keeps every variant inside one aggregated slot. Holding Left Alt while the mouse rests over that slot opens a panel below the inventory, which lists the sub-items in a 7-column grid.
Each entry in the panel shows its own durability bar and enchantment glint, so a player can check a single tool without splitting the stack. Picking up an item of the same type adds it as a new sub-item. Releasing Left Alt closes the panel. Aggregated stacks cannot be placed into crafting table, furnace, smoker, blast furnace or brewing stand slots, which the author notes as a guard against bugs and exploits.
AggStack is built for Fabric and targets 1.21.1 only; it runs on client and server, so both the server and every player need the mod. Pressing G in-game opens its configuration screen. The code is under the MIT License and is open source, and the public source code link is available. Files were first published on 2026-04-05 and the latest, 1.4.0 for 1.21.1, is dated 2026-10-03.
Key features
Aggregated inventory slots
Items sharing an ID but differing in NBT data are stored together in a single inventory slot.
Sub-item panel
Holding Left Alt over an aggregated slot shows every sub-item in a 7-column grid below the inventory.
Per-item detail
Each sub-item in the panel displays its own durability bar and enchantment glint.
Adding variants
Picking up an item of the same type with the mouse adds it as a new sub-item in the stack.
Container restriction
Aggregated stacks are blocked from crafting, furnace, smoker, blast furnace and brewing stand slots.
Configuration screen
Pressing G in-game opens the configuration GUI for adjusting the mod's options.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Creative Crafting Grid is client-side only, open source under the CC0 1.0 Universal license, and covers 1.21.9 – 26.3 on Fabric, so it works on a different range of versions. Refined Saved Hotbar is also client-side only and is closed under All rights reserved, with a single 1.21.11 build. Easy Creative Enchanting runs on client and server like AggStack but is licensed as All rights reserved and is built for 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| AggStack | Fabric | 1.21.1 | Client and server | 2026-10-03 |
| Creative Crafting Grid | Fabric | 1.21.9 – 26.3 | Client-side only | 2026-05-27 |
| Refined Saved Hotbar | Fabric | 1.21.11 | Client-side only | 2026-08-19 |
| Easy Creative Enchanting | Fabric | 1.21.11 | Client and server | 2026-03-10 |
Questions
Does AggStack need Fabric API?
Does AggStack have to be installed on the server?
Which game versions does AggStack support?
In the catalog
AggStack is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from _375_
Similar mods
What the author says
AggStack allows you to store multiple items with the same ID but different NBT data (different durability, enchantments, or custom names) in a single inventory slot. Press G in-game to open the configuration GUI.
Official listing
- Modrinth page
- modrinth.com/mod/aggstack
- Owner
- _375_
- Published
- 2026-04-05
- Updated on Modrinth
- 2026-10-03
- Facts verified
- 2026-10-15