LagFixer
ModrinthSpigotMC⚡️ Best Performance Solution! 🗄️Trusted by 3000+ servers! ✅ Lightweight and highly Asynchronous!
LagFixer helps improve server performance by optimizing the Minecraft engine.
While the paper itself is well optimized, some of its functions still require improvement.
It won’t fix all lag by itself, but it can noticeably reduce it when used alongside well coded plugins and a solid server setup.
It is not intended to resolve issues caused by low quality or poorly configured plugins.
⚡ Requirements & Compatibility
- Java: 21 or later (use version 1.5.3 for java 8 support)
- Server: Bukkit/Spigot/Paper, hybrid Forge, etc.
- Version range:
1.13.2–26.2
🧩 Modules Overview
| Module | Impact | Description & Features |
| :--- | :---: | :--- |
| MobAiReducer | 🔴 VERY HIGH | Replaces creature movement to optimize behavior. Disables unnecessary PathFinders. Crucial for massive animal farms. |
| EntityLimiter | 🔴 HIGH | Restricts the number of entities per chunk. Prevents excessive entity accumulation. |
| LagShield | 🔴 HIGH | Monitors server load and dynamically adjusts settings during latency spikes. |
| ExplosionOptimizer| 🔴 HIGH | Limits explosion power and chain reactions (TNT, creepers, End Crystals). |
| ItemsCleaner | 🟡 MEDIUM | Cleans up old items on the ground. Includes /abyss command for players to retrieve lost items. |
| RedstoneLimiter | 🟡 MEDIUM | Disables demanding Redstone clocks to prevent server overload and crashes. |
| VehicleMotion | 🟡 MEDIUM | Optimizes boats and minecarts. Automatically removes chest minecarts spawned in mineshafts. |
| AbilityLimiter | 🟡 MEDIUM | Limits rapid Trident and Elytra usage to prevent excessive, fast-paced chunk loading. |
| ConsoleFilter | 🟢 VISUAL | Filters console messages based on predefined rules. Enhances log clarity and reduces console clutter. |
🛠️ Features & Integration
🔌 Supported Plugins (optional)
Technical:
Stackers:
Entity Models:
📊 Placeholders
| Placeholder | Description |
| :--- | :--- |
| %lagfixer_tps% | Current ticks per second (TPS) |
| %lagfixer_mspt% | Current milliseconds per tick (MSPT) |
| %lagfixer_cpuprocess%| Current process CPU usage |
| %lagfixer_cpusystem% | Current system CPU usage |
| %lagfixer_worldcleaner%| Countdown to the next world clean |
💻 Commands
/lagfixer- Main plugin command/abyss- The place where deleted items go (recovery)
🛡️ Privacy & Data Collection
This plugin sends error reports, Spark profiler data and bStats metrics to the author's server solely for plugin optimization and finding new performance improvements for your server. Enabled by default. Disable error reporting & Spark via main.errors_reporter: false and bStats via main.bStats: false in config.yml.
Metrics bStats:
🌌 Other Plugins
Check out my other projects:
Versions
FAQ
How do I install LagFixer?
Download the file for your Minecraft version and loader from this page, then drop the .jar into your mods (or plugins) folder and launch the game.
Is LagFixer free?
LagFixer is free to download on Modgrid — we link straight to the official source, no paywall or bundled installer.
Which Minecraft versions does LagFixer support?
Works with Bukkit, Folia, Paper, Purpur. Supports versions 1.13–26.2. See the download section on this page for the full list of supported versions and loaders.
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