Ultimate AntiCrasher
by magmabtw
Ultimate AntiCrasher is a Fabric and Quilt client-side mod that holds back advancement floods sent by servers so the game does not freeze.
What it does
Some servers try to freeze a client by granting and revoking advancements in a tight loop, which floods the game with toast popups. While an advancement flood is in progress, the mod queues the incoming updates instead of applying them, then releases the queued batch once the burst has stopped, so no change is dropped and it lands without a sudden spike. Configuration is needed for it to work, and it covers Minecraft 1.16.5 – 26.2 on Fabric and Quilt. The code is under the Apache License 2.0 and is open source.
Key features
Advancement flood control
Pauses rapid advancement grants and revocations sent by a server during a flood.
Single toast output
Rebuilds the queued advancement updates so the toast popups appear once, not in a repeated stream.
Lossless delivery
Applies the held updates after the flood stops, so no advancement change is dropped.
Gallery
Compatibility
Latest build for each game version and loader.
26.x1 of 1 version with builds
1.21.x4 of 4 versions with builds
1.20.x2 of 2 versions with builds
1.19.x1 of 1 version with builds
1.18.x1 of 1 version with builds
1.16.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Client Crasher is open source under the MIT License and runs on Fabric and Quilt for 1.15 – 26.2. Anti Player Crasher is a Fabric-only client-side mod for 1.21.10 with no open-source code, and Minecart Crashes is server-side only for 1.19 – 1.20.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Ultimate AntiCrasher | Fabric and Quilt | 1.16.5 – 26.2 | Client-side only | 2026-07-10 |
| Client Crasher | Fabric and Quilt | 1.15 – 26.2 | Not published | 2026-08-06 |
| Anti Player Crasher | Fabric | 1.21.10 | Client-side only | 2026-02-20 |
| Minecart Crashes | Fabric and Quilt | 1.19 – 1.20.1 | Server-side only | 2023-07-29 |
In the catalog
Ultimate AntiCrasher is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 13,894 mods support Minecraft 26.2.
Similar mods
What the author says
A client-side Minecraft mod that protects you from "crasher" servers — servers that try to freeze or crash your game on purpose, usually to grief you or troll you. It works quietly in the background: you won't see it doing anything, you'll just notice your game doesn't crash when it normally would. Works with Fabric…
Official listing
- Modrinth page
- modrinth.com/mod/ultimate-anticrasher
- Owner
- magmabtw
- Published
- 2026-07-02
- Updated on Modrinth
- 2026-07-10
- Facts verified
- 2026-10-15