Auto Refill Slot
by Nhbybnb
Auto Refill Slot refills the last hotbar slot from the inventory once its item runs out, so a stack of torches or dirt keeps coming back while building.
What it does
When the final item in a hotbar slot is placed or broken, the mod pulls a matching item from the inventory into that slot. It only activates when the same item is available, so the slot never receives something different. The refill covers blocks, tools and other items, with the mod's behaviour limited to the last hotbar slot.
Auto Refill Slot runs on the client alone and needs no server-side part. Single-player players and multiplayer clients install it; servers run without it. It is published for Fabric only, across seven release versions 1.21 – 26.2, and is not open source: its license is All rights reserved.
The mod is aimed at survival building, redstone work and adventure play, where stopping to reopen the inventory breaks the pace. It requires Fabric on the loader side, and no other catalog mod is named as a dependency for this file.
Key features
Last-slot refill
The final hotbar slot is topped up from the inventory as soon as its last item is used.
Same-item matching
A refill happens only when the inventory holds the same item, so the slot keeps its contents.
Blocks and tools
The behaviour applies to placeable blocks such as torches and dirt, and to tools in the same slot.
Lightweight design
The mod stays on the client and adds little to the game, with no server settings to configure.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Long building sessions
Builders placing one block type across a large project avoid reopening the inventory every few seconds.
Redstone circuits
Torches and repeaters placed in the last slot are replaced automatically while wiring a circuit.
Who it’s for: Survival players, builders, redstone builders and adventurers who want fewer interruptions while placing or breaking blocks.
How it compares
Hotbar Refill is Fabric and client-side only, released under All rights reserved, with files for 1.20.1 – 26.3. Smart Pearl is also Fabric and client-side only under All rights reserved, but has a single file for 1.21.11. AutoInventorySorter is open source under the MIT License, Fabric and client-side only, for 1.21.5 – 1.21.11, so its files differ in range and license.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Auto Refill Slot | Fabric | 1.21 – 26.2 | Client-side only | 2026-07-08 |
| Hotbar Refill | Fabric | 1.20.1 – 26.3 | Client-side only | 2026-09-21 |
| Smart Pearl | Fabric | 1.21.11 | Client-side only | 2026-05-09 |
| AutoInventorySorter | Fabric | 1.21.5 – 1.21.11 | Client-side only | 2026-06-01 |
Questions
Does Auto Refill Slot need Fabric API?
Does the server need Auto Refill Slot?
Which game versions does Auto Refill Slot support?
In the catalog
Auto Refill Slot is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 13,894 mods support Minecraft 26.2.
More from Nhbybnb
Similar mods
What the author says
📦 Perfect for survival gameplay, building sessions, or any time you want less hassle and more action.
Official listing
- Modrinth page
- modrinth.com/mod/auto-refill-slot
- Owner
- Nhbybnb
- Published
- 2025-05-07
- Updated on Modrinth
- 2026-07-08
- Facts verified
- 2026-10-15