AutoRefillX
by LilPeep
AutoRefillX, a Fabric client mod, moves a stack of the same block or item into an empty hotbar slot as soon as the one in hand runs out.
What it does
When the stack in a hotbar slot is used up, the mod looks for another stack of the identical item in the inventory and places it into that slot, so building and mining continue without a pause to reopen menus. A smart matching step restricts refills to identical items, so a glass block will not replace a wool block and a creative-only item stays out of the search.
The mod is client-side only, so the server does not need it and players can use it on vanilla, modded or multiplayer servers without any server permission. It is lightweight, runs within a few ticks, and includes icon support for its metadata. Mod Menu is supported for viewing the mod icon and description in game, and YetAnotherConfigLib (YACL) provides the settings screen.
The mod is published for Fabric only, for Minecraft 1.21.9 and 1.21.10, which are the two release versions with files. The latest file is 1.0.0 for 1.21.10, released on 2025-10-27, the same day the project was first published and last updated. It is released under the MIT License and is not open source.
Key features
Automatic hotbar refill
An emptied hotbar slot is filled from the inventory, so building and mining carry on without interruption.
Identical-item matching
Only identical items are used for refills, so mixed blocks such as glass and wool are never swapped.
Client-side operation
Everything happens on the player's side, so the mod works without changes on the server.
Configurable settings
A YACL settings screen is provided, and future options such as toggles and delays are planned.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Builders and miners who play on Fabric, with or without other mods, and who want an empty hotbar slot refilled from the inventory during play.
How it compares
Smart Refill is also a Fabric client-side mod under the MIT License, but it covers 1.21.4 – 1.21.11, a wider range than AutoRefillX. Hotbar Refill is client-side only as well, under All rights reserved, and is published for 1.20.1 – 26.3. HM Shulker Refill differs in environment: it is client-side only, not server-side, covers 1.21.1 – 1.21.11 and is also under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| AutoRefillX | Fabric | 1.21.9 – 1.21.10 | Client-side only | 2025-10-27 |
| Smart Refill | Fabric | 1.21.4 – 1.21.11 | Client-side only | 2026-09-29 |
| Hotbar Refill | Fabric | 1.20.1 – 26.3 | Client-side only | 2026-09-21 |
| HM Shulker Refill | Fabric | 1.21.1 – 1.21.11 | Server-side only | 2026-07-08 |
Questions
Does AutoRefillX need to be installed on the server?
Which Minecraft versions does AutoRefillX support?
In the catalog
AutoRefillX is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 15,569 mods support Minecraft 1.21.10.
More from LilPeep
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What the author says
Never interrupt your building flow again! Auto Refill (Client) automatically refills your hotbar slot with another stack of the same block or item from your inventory the moment you run out — no menus, no scrolling, and no lost momentum. It’s completely client-side, meaning you can use it on any server, vanilla or…
Official listing
- Modrinth page
- modrinth.com/mod/autorefillx
- Owner
- LilPeep
- Published
- 2025-10-27
- Updated on Modrinth
- 2025-10-27
- Facts verified
- 2026-10-15