Instant Refill+

Instant Refill+ is a lightweight client-side Fabric mod that automatically refills your selected hotbar slot from matching items in your inventory.

When you use the last block, food item, firework, consumable, or other stackable item in your hotbar, Instant Refill moves the next matching stack into that same slot so you can keep building, eating, or using items without opening your inventory.

It also supports non-stackable consumables like potions, honey bottles, and milk buckets. After you drink or use one, the mod remembers what was used and refills the slot only with an exact matching item. An Extended Fire Resistance potion will only refill with another Extended Fire Resistance potion, not a different potion.

Features

Client-side only
Automatically refills the selected hotbar slot
Works with blocks, food, fireworks, potions, and other stackable items
Supports exact-match potion refill after drinking
Keeps potion types strict and predictable
Uses exact item matching so custom data is respected
No server-side installation required

Dependencies

Fabric Loader
Minecraft version matching the jar
Fabric API required for the 26.2 build
Fabric API not required for the 1.20.1 build