Anti Player Crasher

AntiPlayerCrasher is a lightweight Fabric client-side mod for Minecraft 1.21.10 that protects your game from malicious crash packets used by PlayerCrasher-style server plugins. It filters invalid position, explosion, and particle packets.

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About this Mod

AntiPlayerCrasher

AntiPlayerCrasher is a lightweight client-side Fabric mod for Minecraft 1.21.10 that protects your game from malicious packet-based crash attempts.

Some exploit plugins and abusive servers send intentionally broken packet data to force client crashes. This mod intercepts the most common crash packet paths and validates incoming values before Minecraft processes them. Suspicious packets are dropped safely instead of crashing your game.

Features

Blocks malicious position packets
Blocks malicious explosion packets
Blocks malicious particle packets
Detects invalid, non-finite, and extreme numeric values
Lightweight and focused on stability

Why use it

Prevents common PlayerCrasher-style client crashes
Works fully client-side (no server installation needed)
Keeps gameplay unchanged (no intrusive UI/features)
Minimal dependency footprint

Compatibility

Minecraft: 1.21.10
Loader: Fabric Loader 0.18.3+
Java: 21+
Fabric API: not required

Notes

AntiPlayerCrasher is a defensive utility mod.
It does not add content or gameplay mechanics; it only hardens packet handling to keep your client stable on untrusted servers.

Logo is obviously AI generated.

Available Versions

Anti Player Crasher 1.0.0release

MC 1.21.10fabric

February 20, 2026

How to Install Anti Player Crasher on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.10).

Install Mod

Open the mod browser in the dashboard and search for "Anti Player Crasher". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.10

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Anti Player Crasher server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.10). You can switch loaders with one click in the panel.

Is Anti Player Crasher compatible with fabric?

Anti Player Crasher officially supports fabric for Minecraft 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Anti Player Crasher – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Anti Player Crasher consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.