ClientReflex

ClientReflex improves the experience on laggy servers: it reduces disconnections, automatically reconnects, makes movement and attack responses feel more instantaneous, shows real-time ping, and optimizes the connection without cheating.

by zxNoragamiOptimization Technology

Fabric

Loaders: Fabric
Downloads on Modrinth: 1.1K
Followers on Modrinth: 3
versions: 3
Updated: January 27, 2026Jan 27
Published: in 2025

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Client-Side Network Optimization Flow — Conceptual diagram explaining how ClientReflex operates entirely on the client side to improve network stability, reduce perceived latency, and enhance gameplay responsiveness without modifying the server or protocol. · swipe

At a glance

Runs on Fabric

For Minecraft 1.21, 1.21.4

Client only — no need to install it on the server

Latest version — 1.0.2 from January 27, 2026

License MIT — free

Where it's needed

In gamerequiredOn servernot needed

Install in the game only; not needed on the server

Game versions1.21, 1.21.4

ClientReflex (Fabric)

ClientReflex is a client-side mod for Minecraft that improves the multiplayer experience on servers with lag, high ping, or unstable connections. It optimizes how the client handles networking to reduce disconnections and make gameplay feel more responsive—without modifying the protocol or cheating.

Features

Anti-disconnect system for micro network drops
Intelligent auto-reconnect
Network HUD with real-time ping, jitter, and statistics
Packet prioritization (movement, attacks, block placement)
Safe visual prediction (crystals, beds, anchors, TNT minecarts)
Input smoothing and player interpolation
Automatic render adjustments based on ping
Netty optimizations (TCP_NODELAY, SO_KEEPALIVE)

Information

Client-side only (no server required)
Safe and compatible with anti-cheats
Fully configurable (ModMenu optional)
Minecraft 1.21.x · Fabric
Packet Prioritization: Gives priority to critical packets such as movement and attacks.

Requirements

Fabric Loader >= 0.15.0
Fabric API (any version)
Minecraft 1.21.x
Java >= 21

Optional Dependencies

ModMenu 7.2.2+ (for in-game configuration)
Cloth Config API 18.0.145+ (required if using ModMenu for configuration)

Installation

Install Fabric Loader and Fabric API.
Place ClientReflex-1.0.0.jar into the .minecraft/mods/ folder.
(Optional) Install ModMenu and Cloth Config API to configure the mod in-game.

Notes

This mod only optimizes the client–server connection without altering the game protocol, ensuring full compatibility with servers and anti-cheats.

Last updated: 2024

ClientReflex does not reduce your real ping; it improves perceived latency and gameplay stability.

Author: zxNoragami License: MIT

FAQ

How to install ClientReflex?

Install Fabric for your Minecraft version, download ClientReflex for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does ClientReflex support?

ClientReflex has builds for Minecraft 1.21, 1.21.4.

Is ClientReflex needed on the server?

Client only — no need to install it on the server

License and source

MIT Licensefree to use and share with credit to the author

Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders