Packet Sniffer Mod
A lightweight Fabric mod that captures all C2S/S2C network packets to disk with async I/O. No Fabric API required.
Screenshots
About this Mod
Packet Sniffer is a client-side Fabric mod for Minecraft that captures and logs all network packets exchanged between the client and server in real time. Built for developers, modders, and anyone curious about what happens under the hood of Minecraft's network protocol, it intercepts both C2S (Client-to-Server) and S2C (Server-to-Client) traffic and outputs human-readable, fully deserialized packet data to the game log.
Packet Sniffer targets Minecraft 1.21.11+ with Fabric Loader and requires no server-side installation. It serves as a lightweight yet powerful diagnostic tool for protocol analysis, mod debugging, and network education.
Available Versions
How to Install Packet Sniffer Mod 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 (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Packet Sniffer Mod". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 26.1 (+12 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Packet Sniffer Mod 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 (26.1.2). You can switch loaders with one click in the panel.
Is Packet Sniffer Mod compatible with fabric?
Packet Sniffer Mod officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Packet Sniffer Mod – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Packet Sniffer Mod 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.
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Rent Modded Server
Install Packet Sniffer Mod with just one click on your server.