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BlueLib CommonMinecraft mod for 1.21.3

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!

client and servernewest supported 1.21.3UtilityMobsGame MechanicsStorage
Latest version
2.4.3
Minecraft
1.21 to 1.21.3
Java
Java 21+
Loaders
Fabric, NeoForge, Forge
Licence
MIT
Downloads
1.5k
Updated
7 mo ago
Available on
Modrinth
Space NodePartner

Host BlueLib Common servers

One click and BlueLib Common is installed with the right loader, on hardware built for it.

  • 1.21.3
  • Fabric
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version BlueLib Common declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.3Fabric, NeoForge, Forge21+declared23 Oct 2024
1.21.2Fabric, Forge, NeoForge21+declared22 Oct 2024
1.21.1Fabric, Forge, NeoForge21+declared8 Aug 2024
1.21Fabric, NeoForge, Forge21+declared13 Jun 2024

Download

From BlueLib Common’s own host. Nothing is re-hosted here.

2.4.3release4 Jan 2026

2.4.3-common-1.21.1-bluelib-2.4.3.jar · 0.9 MB · for 1.21.1, 1.21.2, 1.21.3

Download latest
f729b5a0b812…
Older versions22
  • 2.4.230 Dec 20251.21.1, 1.21.2, 1.21.30.9 MB36 downloads4e3a4ba56c1c…Get
  • 2.4.130 Dec 20251.21.1, 1.21.2, 1.21.30.9 MB28 downloads8c53885798fc…Get
  • 2.4.028 Nov 20251.21.1, 1.21.2, 1.21.30.9 MB108 downloads1126bd4ac042…Get
  • 2.3.823 Sept 20251.21.1, 1.21.2, 1.21.30.9 MB73 downloads42055c9413a8…Get
  • 2.3.711 Sept 20251.21.1, 1.21.2, 1.21.30.9 MB116 downloads4b3d67c28a92…Get
  • 2.3.629 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB58 downloadse10289945290…Get
  • 2.3.528 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB29 downloadsc5abb5867e0d…Get
  • 2.3.427 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB31 downloads5b0f48127c90…Get
  • 2.3.3.626 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB26 downloads29dcd6c29d65…Get
  • 2.3.3.525 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB27 downloadsea4175a7efc0…Get
  • 2.3.3.424 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB25 downloads6cd30457bfa9…Get
  • 2.3.3.323 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB36 downloads32658ba4eb45…Get
  • 2.3.3.222 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB34 downloads2aa96ed13b4b…Get
  • 2.3.3.121 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB26 downloadsb3b8422c2ba8…Get
  • 2.3.320 Aug 20251.21.1, 1.21.2, 1.21.30.9 MB34 downloads729e53fce138…Get
  • 2.3.214 Aug 20251.21.1, 1.21.2, 1.21.30.8 MB33 downloadsee3680a35857…Get
  • 2.3.111 Aug 20251.21.1, 1.21.2, 1.21.30.8 MB72 downloads8279c574d4a1…Get
  • 2.3.030 Jul 20251.21, 1.21.1, 1.21.2, 1.21.30.3 MB114 downloadsb5ce268544fa…Get
  • 2.2.020 Jul 20251.21, 1.21.1, 1.21.2, 1.21.30.3 MB273 downloads0c914ee1d70e…Get
  • 2.1.010 Jun 20251.21, 1.21.1, 1.21.2, 1.21.30.4 MB98 downloadscb3cc8952c54…Get
  • 2.0.15 Jun 20251.21, 1.21.1, 1.21.2, 1.21.30.3 MB52 downloadsaaed47a9a815…Get
  • 2.0.026 May 20251.21, 1.21.1, 1.21.2, 1.21.30.3 MB38 downloads795215b6ee07…Get

Frequently asked

Does BlueLib Common work on Minecraft 1.21.3?

Yes. 1.21.3 is the newest Minecraft version BlueLib Common declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does BlueLib Common support?

Everything the author has declared, from 1.21 up to 1.21.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install BlueLib Common on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which loader does BlueLib Common need?

Fabric, NeoForge, Forge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for BlueLib Common?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

What licence is BlueLib Common under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install BlueLib Common?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download BlueLib Common safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 6 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .