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BandwidthOptimizerMinecraft mod for 1.21.1

Save your MC bandwidth with big quantities.

newest supported 1.21.1Server UtilityMc Addons
Latest version
BandwidthOptimizer_v3.9.26.72_for_MC_1.21.1_neoforge
Minecraft
1.19.2 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge, Fabric, Quilt
Licence
not stated
Downloads
45.4k
Updated
13 d ago
Available on
CurseForge
Space NodePartner

Host BandwidthOptimizer servers

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

  • 1.21.1
  • NeoForge
  • Forge
  • Fabric
  • Quilt
  • 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
1.21.1NeoForge, Forge, Fabric, Quilt21+declared8 Aug 2024
1.20.1NeoForge, Forge, Fabric, Quilt17+declared12 Jun 2023
1.19.2NeoForge, Forge, Fabric, Quilt17+declared5 Aug 2022

Download

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

All 40 releases
BandwidthOptimizer_v3.9.26.72_for_MC_1.21.1_neoforgerelease22 Jul 2026

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

Download latest
725a40521f62…
Older versions24
  • BandwidthOptimizer_v3.9.26.72_for_MC_1.20.1_forge22 Jul 20261.20.18.5 MB2 downloadsd99f26d57214…Get
  • BandwidthOptimizer_v3.9.26.72_for_MC_1.19.2_forge22 Jul 20261.19.28.5 MB2 downloadsf22740583d43…Get
  • BandwidthOptimizer_v3.9.26.72_for_MC_1.21.1_fabric22 Jul 20261.21.18.5 MB3fa1480b60cf…Get
  • BandwidthOptimizer_v3.9.26.72_for_MC_1.20.1_fabric22 Jul 20261.20.18.5 MB2 downloads1bf4a12d518c…Get
  • BandwidthOptimizer_v2.9.18.55_for_MC_1.21.1_neoforge24 Jun 20261.21.18.4 MB546 downloads867895b31bd1…Get
  • BandwidthOptimizer_v2.9.18.55_for_MC_1.20.1_forge24 Jun 20261.20.18.4 MB1 downloadsdd2ceaaf58cb…Get
  • BandwidthOptimizer_v2.9.18.55_for_MC_1.19.2_forge24 Jun 20261.19.28.4 MB1 downloads7d1b581c4926…Get
  • BandwidthOptimizer_v2.9.18.55_for_MC_1.21.1_fabric24 Jun 20261.21.115.4 MB14 downloadsb1f892c25b6e…Get
  • BandwidthOptimizer_v2.9.18.55_for_MC_1.20.1_fabric24 Jun 20261.20.115.4 MB1 downloads1f90bd4522c1…Get
  • BandwidthOptimizer_v2.8.16.40_for_MC_1.21.1_neoforge20 Jun 20261.21.18.3 MB121 downloadsb26fad5b7c8b…Get
  • BandwidthOptimizer_v2.8.16.40_for_MC_1.20.1_forge20 Jun 20261.20.18.3 MB1 downloads45e5e418a4a6…Get
  • BandwidthOptimizer_v2.8.16.40_for_MC_1.19.2_forge20 Jun 20261.19.28.4 MB1 downloadsbc88fe190f90…Get
  • BandwidthOptimizer_v2.8.16.40_for_MC_1.21.1_fabric20 Jun 20261.21.115.4 MB1 downloadsfd85737c3b03…Get
  • BandwidthOptimizer_v2.8.16.40_for_MC_1.20.1_fabric20 Jun 20261.20.115.4 MB1 downloads2187ff7ca101…Get
  • BandwidthOptimizer_v2.8.16.38_for_MC_1.21.1_neoforge12 Jun 20261.21.18.3 MB285 downloads5cec1686e75a…Get
  • BandwidthOptimizer_v2.8.16.38_for_MC_1.20.1_forge12 Jun 20261.20.18.3 MB2f4518f01b0f…Get
  • BandwidthOptimizer_v2.8.16.38_for_MC_1.19.2_forge12 Jun 20261.19.28.4 MB46de80714f62…Get
  • BandwidthOptimizer_v2.8.16.38_for_MC_1.21.1_fabric12 Jun 20261.21.115.4 MBefe1f8a8c85c…Get
  • BandwidthOptimizer_v2.8.16.38_for_MC_1.20.1_fabric12 Jun 20261.20.115.4 MB3ca02a3ae5be…Get
  • BandwidthOptimizer_v2.8.16.36_for_MC_1.21.1_neoforge8 Jun 20261.21.18.3 MB2 downloads981037b7e6b3…Get
  • BandwidthOptimizer_v2.8.16.36_for_MC_1.20.1_forge8 Jun 20261.20.18.3 MB6f10578e642d…Get
  • BandwidthOptimizer_v2.8.16.36_for_MC_1.19.2_forge8 Jun 20261.19.28.4 MB05e25e999b81…Get
  • BandwidthOptimizer_v2.8.16.36_for_MC_1.21.1_fabric8 Jun 20261.21.115.4 MB1 downloads4cbffa46104b…Get
  • BandwidthOptimizer_v2.8.16.36_for_MC_1.20.1_fabric8 Jun 20261.20.115.4 MB1 downloads95d93ac4e5ed…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.

Which loader does BandwidthOptimizer need?

NeoForge, Forge, Fabric, Quilt. 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 BandwidthOptimizer?

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.

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?

From the author's own page on CurseForge, 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.

BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Last checked 2 d ago against CurseForge. 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? .