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mod

Open LoaderMinecraft mod for 1.21.1

An open source resource and data loader for Minecraft.

newest supported release 1.21.1Utility QolServer UtilityCosmeticLibrary Api
Latest version
OpenLoader-Fabric-1.20.1-19.0.5.jar
Minecraft
1.14.4 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge, Quilt
Licence
not stated
Downloads
48.5M
Updated
9 mo ago
Available on
CurseForge

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge, Quilt21+declared8 Aug 2024
1.20.4NeoForge, Fabric, Quilt, Forge17+declared7 Dec 2023
1.20.3Fabric, Quilt, Forge, NeoForge17+declared4 Dec 2023
1.20.2NeoForge, Fabric, Quilt, Forge17+declared20 Sept 2023
1.20.1Fabric, NeoForge, Forge, Quilt17+declared12 Jun 2023
1.20Fabric, Quilt, Forge, NeoForge17+declared2 Jun 2023
1.19.4NeoForge, Fabric, Quilt, Forge17+declared14 Mar 2023
1.19.3Fabric, NeoForge, Forge, Quilt17+declared7 Dec 2022
1.19.2Fabric, Quilt, Forge, NeoForge17+declared5 Aug 2022
1.19.1Fabric, Quilt, Forge, NeoForge17+declared27 Jul 2022
1.19Fabric, Quilt, Forge, NeoForge17+declared7 Jun 2022
1.18.2Fabric, NeoForge, Forge, Quilt17+declared28 Feb 2022
1.18.1Fabric, Quilt, Forge, NeoForge17+declared10 Dec 2021
1.17.1Quilt, Forge, Fabric, NeoForge16+declared6 Jul 2021
1.17Fabric, Quilt, Forge, NeoForge16+declared8 Jun 2021
1.16.5Fabric, Quilt, Forge, NeoForge8+declared14 Jan 2021
1.16.4Fabric, Quilt, Forge, NeoForge8+declared29 Oct 2020
1.16.3Fabric, Quilt, Forge, NeoForge8+declared10 Sept 2020
1.16.2Forge, Fabric, Quilt, NeoForge8+declared11 Aug 2020
1.16.1Quilt, Forge, Fabric, NeoForge8+declared24 Jun 2020
1.15.2Fabric, Quilt, Forge, NeoForge8+declared17 Jan 2020
1.15.1Forge, Fabric, Quilt, NeoForge8+declared16 Dec 2019
1.15NeoForge, Fabric, Quilt, Forge8+declared9 Dec 2019
1.14.4Fabric, Quilt, Forge, NeoForge8+declared19 Jul 2019

Download

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

Browse 40 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    OpenLoader-neoforge-1.21.1-21.1.5.jar · 19 May 2025 · OpenLoader-neoforge-1.21.1-21.1.5.jar

    Get NeoForge

  • Forge

    OpenLoader-forge-1.21.1-21.1.5.jar · 19 May 2025 · OpenLoader-forge-1.21.1-21.1.5.jar

    Get Forge

  • Fabric, Quilt

    OpenLoader-fabric-1.21.1-21.1.5.jar · 19 May 2025

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

Most recently published release

OpenLoader-Fabric-1.20.1-19.0.5.jarrelease12 Feb 2026

OpenLoader-Fabric-1.20.1-19.0.5.jar · 21 KB · for 1.20.1 · Fabric, Quilt

Choose file on publisher ↗
075a2041acc5…
Older versions24
  • OpenLoader-Forge-1.20.1-19.0.5.jar12 Feb 20261.20.123 KB1 downloada0d862da2dd1…Choose file on publisher ↗
  • OpenLoader-neoforge-1.21.1-21.1.5.jar19 May 20251.21.135 KB109 downloadsb4b49fa0bbef…Get
  • OpenLoader-forge-1.21.1-21.1.5.jar19 May 20251.21.135 KB0a5afb9da92d…Get
  • OpenLoader-fabric-1.21.1-21.1.5.jar19 May 20251.21.137 KB6b6babff8525…Choose file on publisher ↗
  • OpenLoader-neoforge-1.21.1-21.1.4.jar14 May 20251.21.135 KB121 downloadsda42b24014d3…Get
  • OpenLoader-forge-1.21.1-21.1.4.jar14 May 20251.21.135 KB96a7eb5e9fc4…Get
  • OpenLoader-fabric-1.21.1-21.1.4.jar14 May 20251.21.137 KB941ed622d745…Choose file on publisher ↗
  • OpenLoader-neoforge-1.21.1-21.1.3.jar14 May 20251.21.135 KB5 downloads616e87dcd85c…Get
  • OpenLoader-forge-1.21.1-21.1.3.jar14 May 20251.21.135 KB5 downloadsde74a7bb1393…Get
  • OpenLoader-fabric-1.21.1-21.1.3.jar14 May 20251.21.137 KB5 downloads653ed820c3ce…Choose file on publisher ↗
  • OpenLoader-neoforge-1.21.1-21.1.2.jar28 Mar 20251.21.131 KB105.2k downloads587b8e35abfa…Get
  • OpenLoader-forge-1.21.1-21.1.2.jar28 Mar 20251.21.131 KB205 downloadsaf6853fe827c…Get
  • OpenLoader-fabric-1.21.1-21.1.2.jar28 Mar 20251.21.134 KB1.7k downloads3020201151e6…Choose file on publisher ↗
  • OpenLoader-neoforge-1.21.1-21.1.1.jar8 Nov 20241.21.131 KB218.4k downloads854113067309…Get
  • OpenLoader-forge-1.21.1-21.1.1.jar8 Nov 20241.21.131 KB425 downloads1d52acb2f706…Get
  • OpenLoader-fabric-1.21.1-21.1.1.jar8 Nov 20241.21.134 KB2.4k downloads123a3fd53f6f…Choose file on publisher ↗
  • OpenLoader-Fabric-1.20.1-19.0.4.jar24 May 20241.20.121 KB227.9k downloads032da4305432…Choose file on publisher ↗
  • OpenLoader-Forge-1.20.1-19.0.4.jar24 May 20241.20.123 KB1.9M downloads13ee67dace28…Choose file on publisher ↗
  • OpenLoader-NeoForge-1.20.4-22.1.7.jar11 Mar 20241.20.425 KB2.2k downloadsd7681405b20a…Get
  • OpenLoader-Forge-1.20.4-22.1.7.jar11 Mar 20241.20.430 KB983 downloads7e0d87681e69…Get
  • OpenLoader-Fabric-1.20.4-22.1.7.jar11 Mar 20241.20.427 KB2.0k downloads767d4552fd44…Choose file on publisher ↗
  • OpenLoader-NeoForge-1.20.4-22.0.4.jar11 Mar 20241.20.423 KB65 downloads39481b70a6d7…Get
  • OpenLoader-Forge-1.20.4-22.0.4.jar11 Mar 20241.20.427 KB68 downloads480480faa93b…Get
  • OpenLoader-Fabric-1.20.4-22.0.4.jar11 Mar 20241.20.425 KB72 downloads2f6c78dbe36a…Choose file on publisher ↗

Frequently asked

Does Open Loader work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Open Loader 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 Open Loader support?

Everything the author has declared, from 1.14.4 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 Open Loader 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 Open Loader?

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 Open Loader?

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 Open Loader 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.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Details from CurseForge, where the author last updated it on 12 Feb 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? .