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PlatformMinecraft mod for 1.21.1

Cross-platform library mod based on Architectury to access both Forge and Fabric APIs.

newest supported release 1.21.1Library Api
Latest version
Platform-fabric-1.21.1-1.4.2.jar
Minecraft
1.16.5 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge, Quilt
Licence
not stated
Downloads
24.2M
Updated
5 d ago
Available on
CurseForge

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge, Quilt21+declared8 Aug 2024
1.21NeoForge, Quilt, Forge, Fabric21+declared13 Jun 2024
1.20.2Quilt, Fabric, NeoForge, Forge17+declared20 Sept 2023
1.20.1NeoForge, Forge, Quilt, Fabric17+declared12 Jun 2023
1.19.2Fabric, NeoForge, Forge, Quilt17+declared5 Aug 2022
1.16.5Quilt, Forge, NeoForge, Fabric8+declared14 Jan 2021

Download

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

Browse 52 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • Fabric

    Platform-fabric-1.21.1-1.4.2.jar · 25 Oct 2026 · Platform-fabric-1.21.1-1.4.2.jar

    Get Fabric

  • NeoForge

    Platform-neoforge-1.21.1-1.4.2.jar · 25 Oct 2026 · Platform-neoforge-1.21.1-1.4.2.jar

    Get NeoForge

Most recently published release

Platform-fabric-1.21.1-1.4.2.jarrelease25 Oct 2026

Platform-fabric-1.21.1-1.4.2.jar · 0.8 MB · for 1.21.1 · Fabric

Download this release
36fd15b38b7e…
Older versions24
  • Platform-neoforge-1.21.1-1.4.2.jar25 Oct 20261.21.10.5 MB38947983b65b…Get
  • Platform-fabric-1.20.1-1.4.2.jar25 Oct 20261.20.11.0 MB511cb49eb2fa…Get
  • Platform-forge-1.20.1-1.4.2.jar25 Oct 20261.20.11.1 MB877808377db9…Get
  • Platform-fabric-1.21.1-1.4.1.jar23 Oct 20261.21.10.8 MB67f7adf915f0…Get
  • Platform-neoforge-1.21.1-1.4.1.jar23 Oct 20261.21.10.5 MBf183c417154f…Get
  • Platform-fabric-1.20.1-1.4.1.jar23 Oct 20261.20.11.0 MB4f2f9ff70ca2…Get
  • Platform-forge-1.20.1-1.4.1.jar23 Oct 20261.20.11.1 MB70954def6e96…Get
  • Platform-fabric-1.21.1-1.4.jar18 Oct 20261.21.10.8 MB3cbdf209292c…Get
  • Platform-neoforge-1.21.1-1.4.jar18 Oct 20261.21.10.5 MBb59ea845e37f…Get
  • Platform-fabric-1.20.1-1.4.jar18 Oct 20261.20.11.0 MB2e50fc1c289e…Get
  • Platform-forge-1.20.1-1.4.jar18 Oct 20261.20.11.1 MB9d6e9a3879fa…Get
  • Platform-fabric-1.20.1-1.3.4.jar8 Jun 20261.20.10.9 MB1a8c0a12b7f8…Get
  • Platform-forge-1.20.1-1.3.4.jar8 Jun 20261.20.10.5 MB066cc0680210…Get
  • Platform-fabric-1.21.1-1.3.3.jar12 May 20261.21.10.7 MB667 downloadsb3302ad91581…Get
  • Platform-neoforge-1.21.1-1.3.3.jar12 May 20261.21.10.5 MB4132ad680900…Get
  • Platform-fabric-1.20.1-1.3.3.jar12 May 20261.20.10.9 MBba55ef32ff56…Get
  • Platform-forge-1.20.1-1.3.3.jar12 May 20261.20.10.5 MB8512d726e006…Get
  • Platform-forge-1.20.1-1.3.2.jar28 Mar 20261.20.10.5 MB10.7k downloadsb2d4d3fbf0f1…Get
  • Platform-forge-1.20.1-1.3.1.jar27 Mar 20261.20.10.5 MB1.9k downloadsf4ac8de5327b…Get
  • Platform-fabric-1.21.1-1.3.jar25 Mar 20261.21.10.7 MB2.1k downloadsabc57a537cd2…Get
  • Platform-neoforge-1.21.1-1.3.jar25 Mar 20261.21.10.5 MB64a91143d14a…Get
  • Platform-fabric-1.20.1-1.3.jar25 Mar 20261.20.10.9 MB06f332806aa5…Get
  • Platform-forge-1.20.1-1.3.jar25 Mar 20261.20.10.5 MB1804a9fbaa2d…Get
  • Platform-forge-1.20.1-1.2.11.6.2.jar11 Feb 20261.20.10.5 MB5.6k downloads1854581e32a7…Get

Frequently asked

Does Platform work on Minecraft 1.21.1?

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

Everything the author has declared, from 1.16.5 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does Platform support?

Fabric, NeoForge, Forge, Quilt. 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 Platform?

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.

How do I install Platform?

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 Platform safely?

Start with the author's page on CurseForge, 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+)

Details from CurseForge, where the author last updated it on 25 Oct 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? .