BlueLib Common

BlueLib Common

BlueLib is a Minecraft modding library designed to handle a wide range of modding tasks. It includes systems for simplifying code development, with support for data packs and resource packs. The goal is to make modding more accessible!

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BlueLib is a Minecraft modding library designed to handle a wide range of modding tasks. It includes systems for simplifying code development, with support for data packs and resource packs. The goal is to make modding more accessible!

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BlueLib offers one resource for the community: A Wiki. Feel free to go through it.

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Available Versions

2.4.3-common-1.21.1-bluelibrelease
MC 1.21.1, 1.21.2, 1.21.3forge, neoforge
January 4, 2026
2.4.2-common-1.21.1-bluelibrelease
MC 1.21.1, 1.21.2, 1.21.3forge, neoforge
December 30, 2025
2.4.1-common-1.21.1-bluelibrelease
MC 1.21.1, 1.21.2, 1.21.3forge, neoforge
December 30, 2025
2.4.0-common-1.21.1-bluelibrelease
MC 1.21.1, 1.21.2, 1.21.3fabric, forge, neoforge
November 28, 2025
2.3.8-common-1.21.1-bluelibrelease
MC 1.21.1, 1.21.2, 1.21.3fabric, forge, neoforge
September 23, 2025

How to Install BlueLib Common on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.3).

3

Install Mod

Open the mod browser in the dashboard and search for "BlueLib Common". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricforgeneoforge

Minecraft Versions

1.21.3, 1.21.2, 1.21.1 (+1 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

BlueLib Common 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 (1.21.3). You can switch loaders with one click in the panel.

Is BlueLib Common compatible with fabric and forge and neoforge?

BlueLib Common officially supports fabric, forge, neoforge for Minecraft 1.21.3, 1.21.2, 1.21.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with BlueLib Common – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if BlueLib Common 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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Install BlueLib Common with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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Details

License
MIT License
Server-side
Required

Supported Versions

1.21.31.21.21.21.11.21