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Upcycle! (Compost Rotten Flesh!)Minecraft mod for 1.21.10

This mod allows you to upcycle trash like rotten flesh and spider eyes in the composter to bone meal!

server onlynewest supported 1.21.10UtilityGame Mechanics
Latest version
v.3.1.0
Minecraft
1.18 to 1.21.10
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
9.6k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Upcycle! (Compost Rotten Flesh!) servers

One click and Upcycle! (Compost Rotten Flesh!) is installed with the right loader, on hardware built for it.

  • 1.21.10
  • 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 Upcycle! (Compost Rotten Flesh!) declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.10NeoForge, Forge21+declared7 Oct 2025
1.21.9NeoForge, Forge21+declared30 Sept 2025
1.21.5Forge, NeoForge21+declared25 Mar 2025
1.21.4NeoForge, Forge21+declared3 Dec 2024
1.21.3Forge, NeoForge21+declared23 Oct 2024
1.21.2NeoForge, Forge21+declared22 Oct 2024
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.4NeoForge, Forge17+declared7 Dec 2023
1.20.3NeoForge, Forge17+declared4 Dec 2023
1.20.2NeoForge, Forge17+declared20 Sept 2023
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.20NeoForge, Forge17+declared2 Jun 2023
1.19.4Forge, NeoForge17+declared14 Mar 2023
1.19.3NeoForge, Forge17+declared7 Dec 2022
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.19.1NeoForge, Forge17+declared27 Jul 2022
1.19NeoForge, Forge17+declared7 Jun 2022
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.18.1NeoForge, Forge17+declared10 Dec 2021
1.18NeoForge, Forge17+declared30 Nov 2021

Download

From Upcycle! (Compost Rotten Flesh!)’s own host. Nothing is re-hosted here.

v.3.1.0release8 Oct 2025

Upcycle-1.21.10-(v.3.1.0-NEO).jar · 35 KB · for 1.21.10, 1.21.9

Download latest
b6a949d49852…
Older versions11
  • v.3.0.024 May 20251.21.535 KB101 downloadse9288151c7a9…Get
  • v.2.2.111 May 20251.21.542 KB46 downloadscb92b77ec81b…Get
  • v.2.2.026 Mar 20251.21.551 KB107 downloadsbc34490e3a85…Get
  • v.2.1.129 Jan 20251.21.4, 1.21.3, 1.21.251 KB124 downloads0ea6fd1f9ce6…Get
  • v.2.1.01 Jan 20251.21.4, 1.21.3, 1.21.251 KB84 downloadsa11c439313be…Get
  • v.2.0.028 Jun 20241.21.1, 1.2150 KB2.6k downloads4ceccb9e82e9…Get
  • v.1.2.126 Jan 20241.20.4, 1.20.3, 1.20.249 KB158 downloads1f3bc14e5d5b…Get
  • v.1.2.018 Dec 20231.20.4, 1.20.3, 1.20.249 KB111 downloads4f9f6d181887…Get
  • v.1.1.017 Jun 20231.20.4, 1.20.3, 1.20.2, 1.20.1, 1.2050 KB4.6k downloads3e668b8f6edd…Get
  • v.1.0.217 Nov 20221.19.4, 1.19.3, 1.19.2, 1.19.1, 1.1950 KB1.2k downloads4fb4ef404aa1…Get
  • v.1.0.017 Nov 20221.18.2, 1.18.1, 1.1847 KB431 downloads10dfa99e483c…Get

Frequently asked

Does Upcycle! (Compost Rotten Flesh!) work on Minecraft 1.21.10?

Yes. 1.21.10 is the newest Minecraft version Upcycle! (Compost Rotten Flesh!) 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 Upcycle! (Compost Rotten Flesh!) support?

Everything the author has declared, from 1.18 up to 1.21.10. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Upcycle! (Compost Rotten Flesh!) on the client or the server?

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

Which platform or loader does Upcycle! (Compost Rotten Flesh!) support?

NeoForge, Forge. 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 Upcycle! (Compost Rotten Flesh!)?

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 Upcycle! (Compost Rotten Flesh!) under?

LicenseRef-All-Rights-Reserved, 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 Upcycle! (Compost Rotten Flesh!)?

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 Upcycle! (Compost Rotten Flesh!) 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.

Armor HiderHide or adjust the transparency of armor, glint, and offhand items - with full multiplayer sync. No dependencies required.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.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.

Details from Modrinth, where the author last updated it on 8 Oct 2025. 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? .