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Modrinth · Minecraft mod

Kenny´s Hotbar Optimizer

Hotbar Optimizer removes the vanilla delay when switching hotbar slots (up to 50 ms), applies changes per frame for snappier response, and resolves multiple switches per tick. Ideal for PvP and fast combos.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Kenny´s Hotbar Optimizer release should I use?

Updated yesterday
Latest stable file 1.1.1+1.21.5
Game version 1.21.5
Loader Fabric

Kenny´s Hotbar Optimizer 1.1.1+1.21.5 targets 1.21.5 with Fabric. It must be installed on the client. Do not install it on the dedicated server. All 1 required mods have matching files.

Where it goes

Is Kenny´s Hotbar Optimizer required on the client, server, or both?

It must be installed on the client. Do not install it on the dedicated server.

Client Required
Dedicated server Not supported
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

This file is marked client-only.

What else does Kenny´s Hotbar Optimizer 1.1.1+1.21.5 need?

1.1.1+1.21.5. Change the file and its required mods may change too.

All 1 required mods have matching files

Install Fabric API first. We found matching files for this game-version and loader setup.

Fabric API Needed by Kenny´s Hotbar Optimizer 1.1.1+1.21.5
required
Matching file found Matched file: [1.21.5] Fabric API 0.128.2+1.21.5

We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add Kenny´s Hotbar Optimizer without breaking your instance.

Built for Kenny´s Hotbar Optimizer 1.1.1+1.21.5. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 1.1.1+1.21.5. It targets 1.21.5 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install Fabric API first. We found matching files for this game-version and loader setup.

  3. 03

    Put it on the correct side

    It must be installed on the client. Do not install it on the dedicated server.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 1.1.1+1.21.5. It opens that exact file at the source.

About this project

What does Kenny´s Hotbar Optimizer add?

Hotbar Optimizer
Removes the delay when switching hotbar slots

In vanilla Minecraft, your hotbar switch (number keys 1-9 or scrolling) is only processed on the next game tick costing up to 50 ms of local responsiveness. And only ONE pressed slot is committed per tick, so rapid multi switches get lost.

This mod fixes both:

Instant switching on keypress instead of waiting for the next tick.
Per-frame processing (at high FPS, noticeably faster than the 50 ms tick).
Multiple slot switches per tick are resolved correctly.
You get a noticeably snappier, smoother hotbar ideal for PvP and fast combos.

Legit not a cheat
This mod never sends packets outside the normal server tick. It only changes local input/slot handling on the client. It does not break the Minecraft protocol and will not be flagged as a cheat by anti-cheat systems.

Unlike "aggressive" hotbar mods (e.g. Doko's Hotbar Optimizer), this mod does not send the switch packet to the server instantly. That makes it safe to use on virtually any server but without the ghost-totem advantage aggressive mods

if you have any problems or mod ideas join https://discord.gg/ZDTKFxGZvS and tell me

Project description from Modrinth.

Pick your setup

Kenny´s Hotbar Optimizer by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

10 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

Kenny´s Hotbar Optimizer versions and loaders

12 of 12 releases match

Looking for an older file? The official Modrinth project page is in Resources.