Smart Refill

Automatically refills empty hotbar slots with matching items from your inventory. Works in both Survival and Creative mode!

123 Downloads

fabric

Rent Server with this Mod

About this Mod

Smart Refill is a lightweight client-side Fabric mod for Minecraft 1.21.4 that automatically refills empty hotbar slots with matching items from your inventory.

The mod is designed to feel instant and seamless during gameplay, making building, PvP, movement, and general survival gameplay much smoother.

Features:

Instant hotbar refill
Works in Survival mode
Infinite-style refill support in Creative mode
Preserves item data/NBT/components
Lightweight and optimized
Multiplayer compatible
Toggle keybind support
In-game config screen with Mod Menu integration
Clean and minimal design

Supported item types include:

Blocks
Food
Fireworks
End Crystals
Potions
Snowballs
Pearls
Any stackable item

Default Toggle Key:

Requirements:

Fabric Loader
Fabric API
Minecraft 1.21.4

Optional:

Mod Menu (for config screen)
Cloth config API

Available Versions

Smart Refill 1.0.0release

MC 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11fabric

May 8, 2026

How to Install Smart Refill on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "Smart Refill". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+5 more)

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Smart Refill server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is Smart Refill compatible with fabric?

Smart Refill officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Smart Refill – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Smart Refill consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.