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Skyblock BuilderMinecraft mod for 1.21.1

Let you create a custom skyblock island via config

client and servernewest supported 1.21.1Worldgen
Latest version
1.20.1-5.1.33
Minecraft
1.16.4 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
Apache-2.0
Downloads
1.3M
Updated
7 d ago
Available on
Modrinth
Space NodeOur hosting

Host Skyblock Builder servers

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

  • 1.21.1
  • 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 Skyblock Builder declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.2Forge, NeoForge17+declared5 Aug 2022
1.19.1NeoForge, Forge17+declared27 Jul 2022
1.19Forge, NeoForge17+declared7 Jun 2022
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.18.1Forge, NeoForge17+declared10 Dec 2021
1.17.1NeoForge, Forge16+declared6 Jul 2021
1.16.5NeoForge, Forge8+declared14 Jan 2021
1.16.4NeoForge, Forge8+declared29 Oct 2020

Download

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

All 30 releases
1.20.1-5.1.33release7 Jun 2026

SkyblockBuilder-1.20.1-5.1.33.jar · 0.4 MB · for 1.20.1

Download latest
6c9de1a58d16…
Older versions24
  • 21.1.317 Jun 20261.21.10.6 MB92a10a3c8bf6…Get
  • 21.1.307 Jun 20261.21.10.6 MB245b12348f83…Get
  • 21.1.2920 Apr 20261.21.10.6 MB56cf3848eb9a…Get
  • 21.1.2820 Apr 20261.21.10.6 MBebfdfd2b7fe6…Get
  • 1.20.1-5.1.3219 Apr 20261.20.10.4 MBa865941f87b7…Get
  • 21.1.2717 Apr 20261.21.10.6 MBb6e7068d6f3d…Get
  • 1.20.1-5.1.3117 Apr 20261.20.10.4 MBdec1e70ba1d1…Get
  • 1.20.1-5.1.3017 Mar 20261.20.10.4 MBb045b1a5b619…Get
  • 21.1.2617 Mar 20261.21.10.6 MBad9ad150654a…Get
  • 1.20.1-5.1.2915 Mar 20261.20.10.4 MB8f54e6d92e94…Get
  • 21.1.2515 Mar 20261.21.10.6 MB547cb40ad64e…Get
  • 21.1.2412 Jan 20261.21.10.6 MB823dbe2eea08…Get
  • 21.1.2326 Dec 20251.21.10.5 MB55a88abd5607…Get
  • 21.1.221 Dec 20251.21.10.5 MBf357ff0f0d7e…Get
  • 21.1.211 Dec 20251.21.10.5 MB7d015935f989…Get
  • 21.1.2010 Nov 20251.21.10.5 MBde94a7c64e73…Get
  • 1.20.1-5.1.2810 Nov 20251.20.10.4 MB7656c09cf954…Get
  • 21.1.192 Nov 20251.21.10.5 MBba9f1554736f…Get
  • 21.1.181 Sept 20251.21.10.5 MB023c4d5e8870…Get
  • 21.1.1728 Jul 20251.21.10.5 MB1eabd314fa79…Get
  • 1.20.1-5.1.2715 Jun 20251.20.10.4 MB8cea54d85b0d…Get
  • 21.1.1615 Jun 20251.21.10.5 MB285d401c57fc…Get
  • 21.1.156 Jun 20251.21.10.5 MB6bf38028d6e5…Get
  • 1.20.1-5.1.261 May 20251.20.10.4 MB7f43654b4871…Get

Frequently asked

Does Skyblock Builder work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Skyblock Builder 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 Skyblock Builder support?

Everything the author has declared, from 1.16.4 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 Skyblock Builder 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 Skyblock Builder need?

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 Skyblock Builder?

On the newest Minecraft release 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 Skyblock Builder under?

Apache-2.0, 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 Skyblock Builder?

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 Skyblock Builder 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.

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 7 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? .