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Not Enough Bandwidth Legacy(NEBL)Minecraft mod for 1.21.1

NEBL uses various methods to save network traffic during Minecraft gameplay.

client and servernewest supported 1.21.1Optimization
Latest version
21.1.10-neoforge+1.21.1
Loaders
Forge, NeoForge
Licence
GPL-3.0-or-later
Downloads
15.0k
Updated
1 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Not Enough Bandwidth Legacy(NEBL) servers

One click and Not Enough Bandwidth Legacy(NEBL) is installed with the right loader, on hardware built for it.

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

Minecraft versions

Every version Not Enough Bandwidth Legacy(NEBL) declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.12.2Forge, NeoForge8+declared18 Sept 2017

Download

From Not Enough Bandwidth Legacy(NEBL)’s own host. Nothing is re-hosted here.

21.1.10-neoforge+1.21.1release26 Jul 2026

nebl-21.1.10-neoforge+1.21.1.jar · 8.2 MB · for 1.21.1

Download latest
bbee6b66a512…
Older versions10
  • 21.1.09-neoforge+1.21.110 Jul 20261.21.18.2 MB1.1k downloadsd55dcfd8e261…Get
  • 21.1.08-neoforge+1.21.128 Jun 20261.21.18.2 MB1.2k downloads6d6970f2267f…Get
  • 21.1.07-neoforge+1.21.112 Jun 20261.21.18.2 MB974 downloads8f3765feccec…Get
  • 21.1.06-neoforge+1.21.117 May 20261.21.17.2 MB1.0k downloadsd23d9204617b…Get
  • 21.1.05-neoforge+1.21.116 May 20261.21.17.2 MB70 downloads814bdba57659…Get
  • 21.1.04-neoforge+1.21.113 May 20261.21.17.2 MB120 downloads868e55a7519c…Get
  • 21.1.03-neoforge+1.21.17 May 20261.21.17.2 MB211 downloads535c764db764…Get
  • 20.1.02-forge+1.20.13 May 20261.20.17.2 MB4.7k downloadsbf3f9f06c529…Get
  • 21.1.02-neoforge+1.21.124 Apr 20261.21.17.2 MB65 downloads1ed09d9443e3…Get
  • nebl-1.0.13-forge+1.12.223 Apr 20261.12.26.7 MB479 downloads512dfd50d619…Get

Frequently asked

Does Not Enough Bandwidth Legacy(NEBL) work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Not Enough Bandwidth Legacy(NEBL) 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 Not Enough Bandwidth Legacy(NEBL) support?

Everything the author has declared, from 1.12.2 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 Not Enough Bandwidth Legacy(NEBL) 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 Not Enough Bandwidth Legacy(NEBL) support?

Forge, NeoForge. 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 Not Enough Bandwidth Legacy(NEBL)?

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 Not Enough Bandwidth Legacy(NEBL) under?

GPL-3.0-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 Not Enough Bandwidth Legacy(NEBL)?

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 Not Enough Bandwidth Legacy(NEBL) 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.

Details from Modrinth, where the author last updated it on 19 Aug 2026. 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? .