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SepalsMinecraft mod for 1.21.11

An extremely radical and experimental optimization for Minecraft server performances.

server onlynewest supported 1.21.11Optimization
Latest version
1.0.30-fix3
Minecraft
1.21 to 1.21.11
Java
Java 21+
Loaders
NeoForge, Fabric
Licence
GPL-3.0-only
Downloads
41.0k
Updated
6 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Sepals servers

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

  • 1.21.11
  • NeoForge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11NeoForge, Fabric21+declared9 Dec 2025
1.21.10NeoForge, Fabric21+declared7 Oct 2025
1.21.9Fabric, NeoForge21+declared30 Sept 2025
1.21.8NeoForge, Fabric21+declared17 Jul 2025
1.21.7NeoForge, Fabric21+declared30 Jun 2025
1.21.6Fabric, NeoForge21+declared17 Jun 2025
1.21.5NeoForge, Fabric21+declared25 Mar 2025
1.21.4Fabric, NeoForge21+declared3 Dec 2024
1.21.3Fabric, NeoForge21+declared23 Oct 2024
1.21.2NeoForge, Fabric21+declared22 Oct 2024
1.21.1NeoForge, Fabric21+declared8 Aug 2024
1.21Fabric, NeoForge21+declared13 Jun 2024

Download

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

All 33 releases
1.0.30-fix3beta27 Mar 2026

Sepals-neoforge-1.0.30-fix3.jar · 0.2 MB · for 1.21.11

Download latest
39942837c794…
Older versions24
  • 1.0.30-fix231 Dec 20251.21.110.2 MB3.3k downloadsbe72209f3ecc…Get
  • 1.0.30-fix17 Dec 20251.21.110.2 MB573 downloads9bc77dd288fa…Get
  • 1.0.3010 Dec 20251.21.110.2 MB297 downloads16fe7341d4d5…Get
  • 1.0.298 Oct 20251.21.10, 1.21.90.2 MB4.0k downloadsd35d59f03d7c…Get
  • 1.0.286 Oct 20251.21.90.2 MB116 downloads50f29d8717e7…Get
  • 1.0.272 Oct 20251.21.90.5 MB233 downloadsac1dc99873a8…Get
  • 1.0.26-fix25 Sept 20251.21.8, 1.21.70.5 MB1.4k downloads13b1096a5abc…Get
  • 1.0.2624 Sept 20251.21.8, 1.21.70.5 MB101 downloadsd2901271598a…Get
  • 1.0.2524 Sept 20251.21.8, 1.21.72.4 MB61 downloads7ba361577a88…Get
  • 1.0.24-compatible23 Sept 20251.21.8, 1.21.72.4 MB76 downloadsca2bb345f238…Get
  • 1.0.24-fix3 Sept 20251.21.82.4 MB425 downloadse9b12598c642…Get
  • 1.0.2431 Aug 20251.21.82.4 MB123 downloads4096075897b0…Get
  • 1.0.23-compatible28 Jul 20251.21.8, 1.21.7, 1.21.6, 1.21.52.4 MB2.0k downloads77f08ea0faea…Get
  • 1.0.2318 Jul 20251.21.8, 1.21.72.4 MB371 downloads0e3620228dc7…Get
  • 1.0.22-FIX213 Jul 20251.21.72.4 MB52 downloadsdba0fd1d6f2e…Get
  • 1.0.22-FIX9 Jul 20251.21.72.4 MB135 downloads445917f47aa2…Get
  • 1.0.223 Jul 20251.21.72.4 MB154 downloads66fc243987b4…Get
  • 1.0.21-FIX28 Jun 20251.21.62.4 MB225 downloads26ad016cc482…Get
  • 1.0.20-SNAPSHOT25 Jun 20251.21.62.4 MB104 downloads5ac70439759a…Get
  • 1.0.19-SNAPSHOT24 Jun 20251.21.62.4 MB72 downloads381515b900be…Get
  • 1.0.18-SNAPSHOT22 Jun 20251.21.62.4 MB69 downloadsfdeb595e80b3…Get
  • 1.0.17-SNAPSHOT20 Jun 20251.21.62.4 MB103 downloads38380d73ce98…Get
  • 1.0.1623 Apr 20251.21.52.4 MB2.6k downloadsb6abce8dbe19…Get
  • 1.0.1523 Mar 20251.21.12.4 MB4.0k downloadscfd1a5f76740…Get

Frequently asked

Does Sepals work on Minecraft 1.21.11?

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

Everything the author has declared, from 1.21 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 Sepals on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Sepals support?

NeoForge, Fabric. 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 Sepals?

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 Sepals under?

GPL-3.0-only, 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 Sepals?

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 Sepals 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.

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.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Last checked 2 mo 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? .