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.
Quick answer
Which Kenny´s Hotbar Optimizer release should I use?
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.
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.
Install Fabric API first. We found matching files for this game-version and loader setup.
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.
- 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.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 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.
26.1.2
1 loader build26.1.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader buildCheck 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
1.1.1+1.21.5
Kenny's Hotbar Optimizer-1.1.1+1.21.5.jar
6 Oct 2026
1.1.1+1.21.4
Kenny's Hotbar Optimizer-1.1.1+1.21.4.jar
6 Oct 2026
1.1.1+1.21.6
Kenny's Hotbar Optimizer-1.1.1+1.21.6.jar
6 Oct 2026
1.1.1+1.21.8
Kenny's Hotbar Optimizer-1.1.1+1.21.8.jar
6 Oct 2026
1.1.1+1.21.7
Kenny's Hotbar Optimizer-1.1.1+1.21.7.jar
6 Oct 2026
1.1.1+1.21.9
Kenny's Hotbar Optimizer-1.1.1+1.21.9.jar
6 Oct 2026
1.1.1+1.21.10
Kenny's Hotbar Optimizer-1.1.1+1.21.10.jar
6 Oct 2026
1.1.1+1.21.11
Kenny's Hotbar Optimizer-1.1.1+1.21.11.jar
6 Oct 2026
1.1.1+26.1.1
Kenny's Hotbar Optimizer-1.1.1+26.1.1.jar
6 Oct 2026
1.1.1+26.1.2
Kenny's Hotbar Optimizer-1.1.1+26.1.2.jar
6 Oct 2026
1.1.1
Kenny's Hotbar Optimizer-1.1.1.jar
5 Oct 2026
1.1.0
Kenny´s Hotbar Optimizer-1.1.0.jar
30 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.