Anti client crasher
by xXduckyXx1
Anti client crasher is a client-side Fabric mod that blocks malicious packets sent by plugin-holding griefers before they can crash a player's game.
What it does
Some server owners and griefers with plugin access send specially crafted packets that crash clients. The mod inspects incoming packets and drops the dangerous ones before they reach the game, so a crafted packet cannot take the client down. It covers explosion packets with extreme coordinates or power, oversized particle packets that would flood the client, and SetTime packets that are sanitized before use.
The mod also limits sound volume and pitch to safe values and blocks oversized chat system messages, which protects against resource exhaustion attacks. It is aimed at players who join public servers and want protection against hostile hosts. Only the client needs it: players install it, and servers do not. Fabric API is required. Files are published for Fabric only, for 26.1 – 26.1.2, with 1.0.0 for 26.1.2 as the latest file. The mod is released under the CC0 1.0 Universal license and is not open source.
Key features
Explosion packet filtering
Explosion packets with extreme coordinates or power are blocked before the client processes them.
Particle spam protection
Oversized particle packets are stopped, which prevents particle floods from overloading the client.
Sanitized SetTime packets
Dangerous SetTime packets are cleaned up before the client applies them.
Sound and chat limits
Extreme sound volume and pitch are capped, and oversized chat system messages are blocked.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Joining public servers
Players who connect to servers they do not know can keep crafted packets from crashing their game.
Who it’s for: Players who join public or unfamiliar multiplayer servers and want a client-side guard against packet-based crashes.
How it compares
Anti Player Crasher is client-side only, published for 1.21.10 under the MIT License and not open source. Particle Crash Defender is also client-side only, under the MIT License and not open source, with files for 1.20 – 26.1.2, so it covers the same version as this mod with a wider range. Disconnect Packet Fix is server-side only and open source under the MIT License, covering 1.21 – 26.3, so it works on a different side and does not protect clients.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Anti client crasher | Fabric | 26.1 – 26.1.2 | Client-side only | 2026-05-22 |
| Anti Player Crasher | Fabric | 1.21.10 | Client-side only | 2026-02-20 |
| Particle Crash Defender | Fabric | 1.20 – 26.1.2 | Client-side only | 2026-04-29 |
| Disconnect Packet Fix | Fabric and NeoForge | 1.21 – 26.3 | Server-side only | 2026-09-18 |
Questions
Does Anti client crasher need Fabric API?
Does the server need Anti client crasher installed?
Which game versions are supported?
In the catalog
Anti client crasher is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 15,189 mods support Minecraft 26.1.2.
More from xXduckyXx1
Similar mods
What the author says
Protect yourself from malicious servers. This lightweight Fabric client mod protects your Minecraft client from server-side crash
Official listing
- Modrinth page
- modrinth.com/mod/anti-client-crasher
- Owner
- xXduckyXx1
- Published
- 2026-05-22
- Updated on Modrinth
- 2026-05-22
- Facts verified
- 2026-10-15