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Legacy4JMinecraft mod for 26.1.2

This mod adapts all the features from old Minecraft Legacy Console edition

client and servernewest supported release 26.1.2UtilityGame MechanicsManagement
Latest version
1.21.10-1.9.1-fabric
Minecraft
1.20 to 26.1.2
Java
Java 25+
Loaders
Fabric, Quilt, NeoForge, Forge
Licence
MIT
Downloads
992.4k
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Legacy4J servers

One click and Legacy4J is installed with the right loader, on hardware built for it.

  • 26.1.2
  • Fabric
  • Quilt
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Legacy4J declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.1.2Fabric, Quilt, NeoForge, Forge25+declared9 Apr 2026
1.21.11Forge, Quilt, NeoForge, Fabric21+declared9 Dec 2025
1.21.10Forge, Quilt, NeoForge, Fabric21+declared7 Oct 2025
1.21.8Forge, Quilt, NeoForge, Fabric21+declared17 Jul 2025
1.21.7Forge, Quilt, NeoForge, Fabric21+declared30 Jun 2025
1.21.6Forge, Quilt, NeoForge, Fabric21+declared17 Jun 2025
1.21.5Forge, Quilt, NeoForge, Fabric21+declared25 Mar 2025
1.21.4Forge, Quilt, NeoForge, Fabric21+declared3 Dec 2024
1.21.3Fabric, Forge, NeoForge, Quilt21+declared23 Oct 2024
1.21.2Fabric, Quilt, NeoForge, Forge21+declared22 Oct 2024
1.21.1Forge, Quilt, NeoForge, Fabric21+declared8 Aug 2024
1.21Forge, Quilt, NeoForge, Fabric21+declared13 Jun 2024
1.20.6Forge, Quilt, NeoForge, Fabric21+declared29 Apr 2024
1.20.4NeoForge, Quilt, Forge, Fabric17+declared7 Dec 2023
1.20.3Fabric, Quilt, NeoForge, Forge17+declared4 Dec 2023
1.20.2Forge, Quilt, NeoForge, Fabric17+declared20 Sept 2023
1.20.1Forge, Quilt, NeoForge, Fabric17+declared12 Jun 2023
1.20NeoForge, Forge, Fabric, Quilt17+declared2 Jun 2023

Download

From Legacy4J’s own host. Nothing is re-hosted here.

Browse 70 indexed releases

For Minecraft 26.1.2

Choose the loader you use before downloading.

  • NeoForge

    26.1.2-1.9.1-neoforge · 29 Aug 2026 · Legacy4J-26.1.2-1.9.1-neoforge.jar

    Get NeoForge

  • Forge

    26.1.2-1.9.1-forge · 29 Aug 2026 · Legacy4J-26.1.2-1.9.1-forge.jar

    Get Forge

  • Fabric

    26.1.2-1.9.1-fabric · 29 Aug 2026 · Legacy4J-26.1.2-1.9.1-fabric.jar

    Get Fabric

Most recently published release

1.21.10-1.9.1-fabricrelease29 Aug 2026

Legacy4J-1.21.10-1.9.1-fabric.jar · 25.7 MB · for 1.21.10 · Fabric

Download this release
742d8b6fc097…
Older versions24
  • 1.21.10-1.9.1-forge29 Aug 20261.21.1025.6 MB6ec0855279be…Get
  • 1.21.10-1.9.1-neoforge29 Aug 20261.21.1026.6 MBaca53cb6dde1…Get
  • 1.21.11-1.9.1-fabric29 Aug 20261.21.1127.1 MB9c43d0305df8…Get
  • 1.21.11-1.9.1-neoforge29 Aug 20261.21.1126.7 MBa6fd51333a8e…Get
  • 1.21.11-1.9.1-forge29 Aug 20261.21.1126.7 MBd2f5dca7da61…Get
  • 26.1.2-1.9.1-neoforge29 Aug 202626.1.228.0 MBfa538f7999a8…Get
  • 26.1.2-1.9.1-forge29 Aug 202626.1.227.9 MB4cf7f4c3c50f…Get
  • 26.1.2-1.9.1-fabric29 Aug 202626.1.228.4 MB3a40380ad46b…Get
  • 1.21.5-1.9-pre-4-lts+neoforge29 Aug 20261.21.524.7 MB52c42f03038b…Get
  • 1.21.5-1.9-pre-4-lts+fabric29 Aug 20261.21.524.6 MB25dc7b5e0b14…Choose file on publisher ↗
  • 1.21.4-1.9-pre-4-lts+neoforge29 Aug 20261.21.424.7 MBf99ba023b297…Get
  • 1.21.5-1.9-pre-4-lts+forge29 Aug 20261.21.524.6 MBedbd6765e69b…Get
  • 1.21.4-1.9-pre-4-lts+fabric29 Aug 20261.21.424.6 MB49e6356afda8…Choose file on publisher ↗
  • 1.21.3-1.9-pre-4-lts+fabric29 Aug 20261.21.3, 1.21.224.6 MBb3f5ee453d4f…Choose file on publisher ↗
  • 1.21.4-1.9-pre-4-lts+forge29 Aug 20261.21.424.6 MB37b7e693f6ec…Get
  • 1.21.3-1.9-pre-4-lts+neoforge29 Aug 20261.21.3, 1.21.224.7 MBbfad00310d5f…Get
  • 1.21.1-1.9-pre-4-lts+neoforge29 Aug 20261.21.1, 1.2124.7 MB50f117298d53…Get
  • 1.21.1-1.9-pre-4-lts+forge29 Aug 20261.21.1, 1.2124.6 MBd6eeca7080e6…Get
  • 1.20.4-1.9-pre-4-lts+fabric29 Aug 20261.20.4, 1.20.324.6 MB4a12f2b40e21…Choose file on publisher ↗
  • 1.20.4-1.9-pre-4-lts+neoforge29 Aug 20261.20.4, 1.20.324.7 MB612646a0b98f…Get
  • 1.20.1-1.9-pre-4-lts+forge29 Aug 20261.20.1, 1.2024.7 MBf018d0f0bb9a…Choose file on publisher ↗
  • 1.20.4-1.9-pre-4-lts+forge29 Aug 20261.20.4, 1.20.324.7 MB81ea21359945…Get
  • 1.21.1-1.9-pre-4-lts+fabric29 Aug 20261.21.1, 1.2124.6 MB9a2a38267c45…Choose file on publisher ↗
  • 1.20.1-1.9-pre-4-lts+fabric29 Aug 20261.20.1, 1.2024.6 MBa8ceea643d17…Choose file on publisher ↗

Dependencies

What Legacy4Jdeclares 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.Factory APIRequired. An API that supports different mod loaders and is the basis of mods like Factocrafty

Frequently asked

Does Legacy4J work on Minecraft 26.1.2?

Yes. 26.1.2 is the newest Minecraft version Legacy4J 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 Legacy4J support?

Everything the author has declared, from 1.20 up to 26.1.2. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Legacy4J 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 Legacy4J 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 Legacy4J?

Among the supported Minecraft releases above, the highest recorded requirement is Java 25 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Legacy4J need to run?

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

What licence is Legacy4J under?

MIT, 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 Legacy4J?

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 Legacy4J 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.

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

Used by

1 project lists Legacy4J as a required dependency.

Unified Legacy SettingsThis mod adds native setting options to Legacy4J's menus for various mods.

Details from Modrinth, where the author last updated it on 29 Aug 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? .