Compatibility
Minecraft: Java Edition
1.21.4
Platforms
Supported environments
Client-side
Links
Tags
Creators
Details
Licensed CC0-1.0
Published 2 weeks ago
Updated last month
Universal Input Sync
Universal Input Sync is a lightweight, client-side QoL (Quality of Life) mod that fixes input race conditions in Minecraft, eliminating "dead clicks" during high-APM gameplay.
⚙️ How It Works
In vanilla Minecraft, rapid hotbar switching and clicking within the exact same frame (<16ms) causes state desyncs. This mod fixes the root cause by enforcing deterministic ordering. It guarantees your slot update (UpdateSelectedSlotC2SPacket) is strictly processed before your interaction packet, preventing ghost clicks.
✨ Features
- True 1:1 Input: Zero macros, no packet spoofing, no hacking, and no artificial CPS.
- Universal QoL Fix: Applies natively to all items globally.
- Client-Side Only: Works on any vanilla server without server-side installation.
📦 Requirements
- Minecraft 1.21.4 (Fabric API)
Disclaimer: This mod uses strictly vanilla packet structures with zero automation. However, exceptionally fast, non-human input consistencies may still trigger heuristic flags on aggressively tuned anti-cheats (e.g., GrimAC).


