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BandwidthOptimizerMinecraft mod for 1.21.1

Save your MC bandwidth with big quantities.

client and servernewest supported 1.21.1Optimization
Latest version
1.21.1-3.9.26.72-neoforge
Minecraft
1.19.2 to 1.21.1
Java
Java 21+
Loaders
Quilt, NeoForge, Fabric, Forge
Licence
LGPL-2.1-or-later
Downloads
70.6k
Updated
2 d ago
Available on
Modrinth
Space NodeOur hosting

Host BandwidthOptimizer servers

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

  • 1.21.1
  • Quilt
  • NeoForge
  • Fabric
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Quilt, NeoForge, Fabric, Forge21+declared8 Aug 2024
1.20.1NeoForge, Fabric, Forge, Quilt17+declared12 Jun 2023
1.19.2Fabric, Quilt, NeoForge, Forge17+declared5 Aug 2022

Download

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

All 60 releases
1.21.1-3.9.26.72-neoforgerelease22 Jul 2026

BandwidthOptimizer-3.9.26.72-neoforge-1.21.1.jar · 8.5 MB · for 1.21.1

Download latest
090dd65485eb…
Older versions24
  • 1.20.1-3.9.26.72-forge22 Jul 20261.20.18.5 MB2.6k downloadsccfb72ac8cd0…Get
  • 1.19.2-3.9.26.72-forge22 Jul 20261.19.28.5 MB33 downloads7216a7f584ae…Get
  • 1.21.1-3.9.26.72-fabric22 Jul 20261.21.18.5 MB25 downloadsb0381a51b8c8…Get
  • 1.20.1-3.9.26.72-fabric22 Jul 20261.20.18.5 MB34 downloads83be0b3aaddc…Get
  • 1.21.1-2.9.18.55-neoforge24 Jun 20261.21.18.4 MB2.3k downloads0241c401484a…Get
  • 1.20.1-2.9.18.55-forge24 Jun 20261.20.18.4 MB1.7k downloadsc145b497300e…Get
  • 1.19.2-2.9.18.55-forge24 Jun 20261.19.28.4 MB53 downloads1db2083e53c6…Get
  • 1.21.1-2.9.18.55-fabric24 Jun 20261.21.115.4 MB105 downloads14ce46ad2694…Get
  • 1.20.1-2.9.18.55-fabric24 Jun 20261.20.115.4 MB82 downloads07497bfad26c…Get
  • 1.21.1-2.8.16.40-neoforge20 Jun 20261.21.18.3 MB303 downloads20d9b184ad18…Get
  • 1.20.1-2.8.16.40-forge20 Jun 20261.20.18.3 MB355 downloadsc62bcb282e8e…Get
  • 1.19.2-2.8.16.40-forge20 Jun 20261.19.28.4 MB16 downloadsc2a481beb1d9…Get
  • 1.21.1-2.8.16.40-fabric20 Jun 20261.21.115.4 MB48 downloadsb547e5fb640e…Get
  • 1.20.1-2.8.16.40-fabric20 Jun 20261.20.115.4 MB23 downloadsebebba83e9ac…Get
  • 1.21.1-2.8.16.38-neoforge12 Jun 20261.21.18.3 MB640 downloadsd00cd7ccd025…Get
  • 1.20.1-2.8.16.38-forge12 Jun 20261.20.18.3 MB551 downloads000cb2839653…Get
  • 1.19.2-2.8.16.38-forge12 Jun 20261.19.28.4 MB19 downloadsaf5bf2a02304…Get
  • 1.21.1-2.8.16.38-fabric12 Jun 20261.21.115.4 MB40 downloadsc911441025c8…Get
  • 1.20.1-2.8.16.38-fabric12 Jun 20261.20.115.4 MB12 downloads0596f4971c16…Get
  • 1.21.1-2.8.16.36-neoforge8 Jun 20261.21.18.3 MB265 downloads274fcc7fbea2…Get
  • 1.20.1-2.8.16.36-forge8 Jun 20261.20.18.3 MB171 downloads2abf299ea41a…Get
  • 1.19.2-2.8.16.36-forge8 Jun 20261.19.28.4 MB13 downloads3a05bb454145…Get
  • 1.21.1-2.8.16.36-fabric8 Jun 20261.21.115.4 MB22 downloadsd84e4d0a09cd…Get
  • 1.20.1-2.8.16.36-fabric8 Jun 20261.20.115.4 MB24 downloads5b6da6300ed9…Get

Frequently asked

Does BandwidthOptimizer work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version BandwidthOptimizer 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 BandwidthOptimizer support?

Everything the author has declared, from 1.19.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install BandwidthOptimizer 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 platform or loader does BandwidthOptimizer support?

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

Which Java version do I need for BandwidthOptimizer?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is BandwidthOptimizer under?

LGPL-2.1-or-later, 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 BandwidthOptimizer?

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 BandwidthOptimizer safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

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 2 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? .