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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 1.21.1UtilityLibrary
Latest version
1.4.1
Minecraft
1.16.5 to 1.21.1
Java
Java 21+
Loaders
Fabric, Quilt, NeoForge, Forge
Licence
LGPL-3.0-only
Downloads
10.1M
Updated
5 d ago
Available on
Modrinth
Space NodeOur hosting

Host Platform servers

One click and Platform 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 Platform declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, Quilt, NeoForge, Forge21+declared8 Aug 2024
1.20.1Fabric, Forge, NeoForge, Quilt17+declared12 Jun 2023
1.19.2Quilt, Fabric, Forge, NeoForge17+declared5 Aug 2022
1.16.5Fabric, Quilt, NeoForge, Forge8+declared14 Jan 2021

Download

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

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • Fabric

    1.4.1 · 23 Oct 2026 · Platform-fabric-1.21.1-1.4.1.jar

    Get Fabric

  • Fabric, Forge, NeoForge

    1.3.3 · 12 May 2026

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

  • Forge, NeoForge

    1.2.11.6.2 · 11 Feb 2026

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

  • NeoForge

    1.2.11.6.1 · 7 Feb 2026 · Platform-neoforge-1.21.1-1.2.11.6.1.jar

    Get NeoForge

Most recently published release

1.4.1release23 Oct 2026

Platform-fabric-1.21.1-1.4.1.jar · 0.8 MB · for 1.21.1 · Fabric

Download this release
7a30efa18e1e…
Older versions19

Dependencies

What Platformdeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Fabric APIRequired. Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.

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, 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 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.

What does Platform need to run?

It declares Fabric API as required, so that has to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Platform under?

LGPL-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 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 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.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Used by

4 projects list Platform as a required dependency.

Vanilla BackportBackports modern minecraft features to previous versions, trying to keep it as accurate as vanilla MinecraftDungeon Train: A Lore-Rich Roguelite RPG AdventureAdventure time inspired dungeon crawler on a train. Procedurally generated carriages on a infinite sable physics train. Rich narrative, with custom made mods for a completely unique experience.Instant Feedback for Vanilla BackportImplements the most requested features from feedback.minecraft.net - backported to 1.21.1 & 1.20.1.TerraCliffCliffTree + Terralith compatiblity.

Details from Modrinth, 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? .