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ZstdMC

a mod using zstandard to saving network bandwidth

NeoForge
Loaders
NeoForge
Downloads on Modrinth
8K
Followers on Modrinth
7
version
1
Updated
February 20, 2026Feb 20
Published
in 2026

At a glance

Runs on NeoForge
For Minecraft 1.21.1
Needed in the game and on the server
Latest version — 1.0-SNAPSHOT from February 20, 2026
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21.1

ZstdMC: Multiplayer Network Optimization ZstdMC is a performance-focused mod designed to optimize network bandwidth usage in multiplayer environments.

By replacing Minecraft's built-in compression and decompression modules with the Zstandard (zstd) library, this mod achieves significantly higher compression ratios, resulting in substantial data savings. In most scenarios, it provides these benefits with no negative impact on the game's stability or performance.

Key Features Bandwidth Efficiency: Saves approximately 40% to 90% of network traffic in multiplayer mode.

Low Overhead: High-performance compression that minimizes CPU resource consumption.

Easy Setup: Simply drop the mod file into both the server and client mods folders.

Configuration Requirement To enable the optimization, ensure your server's server.properties file has the following parameter set:

network-compression-threshold=128 (or higher)

Important Note on Versions Fat Version (Recommended): In most cases, you should use the Fat version, which includes all necessary libraries.

Fit Version: If you experience crashes or compatibility issues, please switch to the Fit version to resolve them.

FAQ

How to install ZstdMC?

Install NeoForge for your Minecraft version, download ZstdMC for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does ZstdMC support?

ZstdMC has builds for Minecraft 1.21.1.

Is ZstdMC needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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