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PolymorphMinecraft mod for 1.21.1

No more recipe conflicts! Adds an option to choose the crafting result if more than one is available.

client and servernewest supported release 1.21.1Utility
Latest version
0.49.11+1.20.1
Minecraft
1.15.2 to 1.21.1
Java
Java 21+
Loaders
Fabric, Quilt, NeoForge, Forge
Licence
LGPL-3.0-or-later
Downloads
24.4M
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Polymorph servers

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

  • 1.21.1
  • Fabric
  • Quilt
  • 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 Polymorph declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, Quilt, NeoForge, Forge21+declared8 Aug 2024
1.21Forge, Quilt, NeoForge, Fabric21+declared13 Jun 2024
1.20.6Forge, Quilt, NeoForge, Fabric21+declared29 Apr 2024
1.20.4Forge, Quilt, NeoForge, Fabric17+declared7 Dec 2023
1.20.2Forge, Quilt, NeoForge, Fabric17+declared20 Sept 2023
1.20.1Forge, Quilt, NeoForge, Fabric17+declared12 Jun 2023
1.20Forge, Quilt, NeoForge, Fabric17+declared2 Jun 2023
1.19.4Fabric, Forge, NeoForge, Quilt17+declared14 Mar 2023
1.19.3Fabric, Quilt, NeoForge, Forge17+declared7 Dec 2022
1.19.2Forge, Quilt, NeoForge, Fabric17+declared5 Aug 2022
1.19.1Forge, Quilt, NeoForge, Fabric17+declared27 Jul 2022
1.19Fabric, Quilt, NeoForge, Forge17+declared7 Jun 2022
1.18.2Fabric, Quilt, NeoForge, Forge17+declared28 Feb 2022
1.17.1Forge, Quilt, NeoForge, Fabric16+declared6 Jul 2021
1.16.5Forge, Quilt, NeoForge, Fabric8+declared14 Jan 2021
1.15.2Quilt, Forge, NeoForge, Fabric8+declared17 Jan 2020

Download

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

Browse 29 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    1.2.0+1.21.1 · 10 Sept 2026 · polymorph-neoforge-1.2.0+1.21.1.jar

    Get NeoForge

Most recently published release

0.49.11+1.20.1beta11 Sept 2026

polymorph-forge-0.49.11+1.20.1.jar · 0.3 MB · for 1.20.1, 1.20 · Forge

Download this release
807b830ece5f…
Older versions24
  • 0.46.7+1.19.211 Sept 20261.19.2, 1.19.1, 1.190.2 MB5293f18661ec…Get
  • 1.18.2-0.5111 Sept 20261.18.20.2 MB98720c4de3b1…Get
  • 0.0.25-1.18.211 Sept 20261.18.20.3 MBa8715db72ce2…Get
  • 1.2.0+1.21.110 Sept 20261.21.1, 1.210.2 MBdce77fffebae…Get
  • 1.1.0+1.21.121 Jul 20251.21.1, 1.210.2 MB12.7k downloads37358e19d8f2…Get
  • 1.0.10+1.21.122 Apr 20251.21.1, 1.210.2 MB2.6k downloads455ff2f8f44b…Get
  • 0.49.10+1.20.122 Apr 20251.20.1, 1.200.3 MB3.3M downloadsc36b4c3b893f…Get
  • 1.0.9+1.21.113 Apr 20251.21.1, 1.210.2 MB331 downloads1bb7830331f7…Get
  • 0.49.9+1.20.11 Apr 20251.20.1, 1.200.3 MB36.5k downloads9d023527ce22…Get
  • 1.0.8+1.21.11 Apr 20251.21.1, 1.210.2 MB391 downloads3adc381b367a…Get
  • 1.0.7+1.21.116 Dec 20241.21.1, 1.210.2 MB3.1k downloads0f7933a3c3bf…Get
  • 0.49.8+1.20.116 Dec 20241.20.1, 1.200.3 MB4.9k downloads97e88f8ce0de…Get
  • 0.49.7+1.20.119 Sept 20241.20.1, 1.200.6 MB1.4k downloads52e902dc8c48…Get
  • 0.49.6+1.20.113 Sept 20241.20.1, 1.200.8 MB209 downloads1624927ea867…Get
  • 1.0.6+1.21.16 Sept 20241.21.1, 1.210.2 MB1.7k downloads48bd4b5206fd…Get
  • 1.0.5+1.2121 Jul 20241.210.2 MB3.4k downloads45b08b4a89cb…Get
  • 0.52.3+1.20.617 Jul 20241.20.60.1 MB1.2k downloads5fe881ddb44e…Get
  • 1.0.4+1.2117 Jul 20241.210.2 MB613 downloadsbc4f002e1a01…Get
  • 1.0.3+1.2114 Jul 20241.210.2 MB221 downloads587e304d12b1…Get
  • 1.0.2+1.2127 Jun 20241.210.2 MB364 downloads99ed6c7da954…Get
  • 1.0.1+1.2126 Jun 20241.210.3 MB682 downloads1e9fb818b63b…Get
  • 1.0.0+1.2126 Jun 20241.210.2 MB214 downloads3c1da2aef29f…Get
  • 0.52.2+1.20.621 Jun 20241.20.60.2 MB199 downloads8bf729f26ea3…Get
  • 0.52.1+1.20.63 Jun 20241.20.60.2 MB220 downloads96c46874f8df…Get

Frequently asked

Does Polymorph work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Polymorph 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 Polymorph support?

Everything the author has declared, from 1.15.2 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 Polymorph 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 Polymorph support?

Fabric, Quilt, 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 Polymorph?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Polymorph under?

LGPL-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 Polymorph?

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 Polymorph 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. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

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.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Used by

2 projects list Polymorph as a required dependency.

Better Loot ZiburaImprove vanilla structure loot. Compatible with Ctov, Kaleidoscope Cookery, Farmers delight, Farm and Charm, and moreDeus Ex:Minecraft's ConspiracyUse MCreator to make Deus Ex 2000 come true in mincraft!!! Add some weapons(GEP GUN!!!) some npcs and some materials.

Details from Modrinth, where the author last updated it on 11 Sept 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .