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modpack

UltralightMinecraft modpack for 1.21.11

1.21.6-1.21.11 | Only what you need for performance.

client onlynewest supported 1.21.11OptimizationLightweight
Latest version
26.2_2.2_A
Minecraft
1.21.6 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
4.0k
Updated
5 mo ago
Available on
Modrinth
Space NodePartner

Host Ultralight servers

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

  • 1.21.11
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • 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 Ultralight declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025
1.21.9Fabric21+declared30 Sept 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.6Fabric21+declared17 Jun 2025

Download

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

All 46 releases
26.2_2.2_Arelease28 Jul 2026

Ultralight 26.2 26.2_2.2_A.mrpack · 0.1 MB · for 26.2

Download latest
e68da2d25293…
Older versions24
  • 1.21.11_2.2_A14 Mar 20261.21.110.0 MB1.7k downloadse0abdd2e0a68…Get
  • 1.21.10_2.2_A14 Mar 20261.21.100.0 MB82 downloads62695d9de184…Get
  • 1.21.9_2.2_A14 Mar 20261.21.90.0 MB12 downloads2fbb1cc2ca81…Get
  • 1.21.8_2.2_A14 Mar 20261.21.80.0 MB51 downloadsa53dcea2fa83…Get
  • 1.21.11_2.1_A20 Jan 20261.21.110.0 MB1.0k downloads702ed01833bf…Get
  • 1.21.10_2.1_A20 Jan 20261.21.100.0 MB55 downloads89d08a066be8…Get
  • 1.21.9_2.1_A20 Jan 20261.21.90.0 MB14 downloads147d21d5f3ad…Get
  • 1.21.8_2.1_A20 Jan 20261.21.80.0 MB72 downloadsbd0105d697f4…Get
  • 1.21.7_2.1_A20 Jan 20261.21.70.0 MB57 downloads0b4b1937433b…Get
  • 1.21.6_2.1_A20 Jan 20261.21.60.0 MB81 downloadsd334e8b4ec93…Get
  • 1.21.11_2.0_A26 Dec 20251.21.110.0 MB174 downloads79785249d120…Get
  • 1.21.10_2.0_A26 Dec 20251.21.100.0 MB24 downloads906324649d62…Get
  • 1.21.9_2.0_A26 Dec 20251.21.90.0 MB15 downloads77aa068d58a9…Get
  • 1.21.8_2.0_A26 Dec 20251.21.80.0 MB50 downloadsc31fee73a68c…Get
  • 1.21.7_2.0_A26 Dec 20251.21.70.0 MB14 downloads0c93b62bd8d0…Get
  • 1.21.6_2.0_A26 Dec 20251.21.60.0 MB62 downloads57eb22923ab4…Get
  • Ultralight_1.21.6_1.5_A21 Dec 20251.21.60.0 MB26 downloads8b97a59f6320…Get
  • Ultralight_1.21.7_1.5_A21 Dec 20251.21.70.0 MB14 downloads3eb9e8f1afaf…Get
  • Ultralight_1.21.8_1.5_A21 Dec 20251.21.80.0 MB15 downloads5d778c1c6fea…Get
  • Ultralight_1.21.9_1.5_A21 Dec 20251.21.90.0 MB11 downloads042ef7798e9e…Get
  • Ultralight_1.21.10_1.4_A21 Dec 20251.21.100.0 MB16 downloadsf82f2fd457bc…Get
  • Ultralight_1.21.10_1.3_A24 Nov 20251.21.100.0 MB52 downloadsf334ae991b37…Get
  • Ultralight_1.21.9_1.4_A24 Nov 20251.21.90.0 MB19 downloadsf111de950d91…Get
  • Ultralight_1.21.8_1.4_A24 Nov 20251.21.80.0 MB15 downloads8197c3d75a92…Get

Frequently asked

Does Ultralight work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Ultralight 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 Ultralight support?

Everything the author has declared, from 1.21.6 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Ultralight on the client or the server?

The client only. There is nothing to install on the server, so it works on any server you can already join.

Which loader does Ultralight need?

Fabric. 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 Ultralight?

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 modpack itself.

What licence is Ultralight 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 Ultralight?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack 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 Ultralight 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.

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