This is a small client-side mod for Fabric Minecraft 1.21.11. It prevents the game from freezing or stuttering when chat messages are received or sent on servers.
In vanilla Minecraft, the game processes chat messages on the main render thread. This is the same thread that draws the game to your screen. When a message arrives, the game stops everything to do several heavy tasks:
If any of these tasks take even a few milliseconds, your game will stutter. If they take longer, your game will freeze until the task finishes.
This mod intercepts chat messages the moment they arrive and moves the heavy processing to a dedicated background thread. This allows the main game thread to continue rendering frames without interruption.
Because the processing happens in the background, you might notice a very slight delay before a message appears in your chat box, but your framerate will remain smooth and consistent.
This was only tested on offline mode I am not even sure if it's a real problem in online mode. But the processing is done same everywhere so it should work for anyone
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as ChatLagFix-1.0.jar — drop this file into the mods folder
- Download size: 1.6 MB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.