- Tested MC versions
- 1.21
LagFixer: The Ultimate Server Performance Booster
LagFixer is a lightweight, high-performance plugin designed to banish lag and lower ping on your Minecraft 1.21+ server. Whether you run a small survival server or a crowded SMP, LagFixer intelligently manages resources to keep your TPS high and your players happy.
LagFixer Banner Version
Key Features
Smart Lag Cleanup
Don't let ground items ruin your server performance. LagFixer automatically scans your worlds every 2 minutes to remove trash items and XP orbs, while keeping valuable named items safe.
Ping & Network Optimizer
LagFixer actively monitors your server's health. If the server detects heavy load or high player counts, it dynamically adjusts view distances. This reduces the amount of data sent to clients, effectively lowering ping for players with weaker connections.
Intelligent Crowd Control
Got a popular spawn or a busy trading hall? CrowdManager detects when players cluster together (5+ in a chunk) and automatically:
Limits local view distances to prevent rendering overload.
Aggressively cleans up items in that specific area.
result: Smooth FPS even in the busiest server hubs!
Entity Logic Saver
When the server starts to struggle (TPS < 18), LagFixer intelligently disables the AI of distant mobs and limits natural spawning rates, giving your CPU the breathing room it needs to recover instantly.
Compatibility
Built for the modern era. Fully compatible with:
Paper 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4 (and newer!)
ViaVersion / ViaBackwards friendly.
Commands & Permissions
Command Permission Description
/lagfix stats None View current Server TPS and status.
/lagfix clear lagfixer.admin Manually run a cleanup sweep immediately.
Installation
Download the
.jar
matching your version.
Drop it into your /plugins folder.
Restart your server.
Enjoy the speed!
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