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J4mc (update)Minecraft mod for 26.3

j4mc lets you open your singleplayer world to friends without port forwarding. Open your world to LAN, wait a moment, and the mod gives you a public address that your friends can join through. Now you can invite your friends through the game in one click!

client onlynewest supported release 26.3UtilitySocial
Latest version
0.1.11
Minecraft
1.16.2 to 26.3
Java
Java 25+
Loaders
Forge, Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
993
Updated
10 d ago
Available on
Modrinth

Screenshots

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

Minecraft versions

Every version J4mc (update) declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.3Forge, Fabric25+declared15 Sept 2026
26.2Forge, Fabric25+declared16 Jun 2026
26.1.2Fabric, Forge25+declared9 Apr 2026
26.1.1Forge, Fabric25+declared1 Apr 2026
26.1Forge, Fabric25+declared24 Mar 2026
1.21.11Forge, Fabric21+declared9 Dec 2025
1.21.10Forge, Fabric21+declared7 Oct 2025
1.21.9Forge, Fabric21+declared30 Sept 2025
1.21.8Forge, Fabric21+declared17 Jul 2025
1.21.7Forge, Fabric21+declared30 Jun 2025
1.21.6Fabric, Forge21+declared17 Jun 2025
1.21.5Forge, Fabric21+declared25 Mar 2025
1.21.4Forge, Fabric21+declared3 Dec 2024
1.21.3Forge, Fabric21+declared23 Oct 2024
1.21.2Fabric, Forge21+declared22 Oct 2024
1.21.1Forge, Fabric21+declared8 Aug 2024
1.20.5Forge, Fabric21+declared23 Apr 2024
1.20.4Forge, Fabric17+declared7 Dec 2023
1.20.3Fabric, Forge17+declared4 Dec 2023
1.20.2Forge, Fabric17+declared20 Sept 2023
1.20.1Forge, Fabric17+declared12 Jun 2023
1.19.4Forge, Fabric17+declared14 Mar 2023
1.19.3Forge, Fabric17+declared7 Dec 2022
1.19.2Forge, Fabric17+declared5 Aug 2022
1.18.2Forge, Fabric17+declared28 Feb 2022
1.17.1Forge, Fabric16+declared6 Jul 2021
1.17Forge, Fabric16+declared8 Jun 2021
1.16.5Forge, Fabric8+declared14 Jan 2021
1.16.4Forge, Fabric8+declared29 Oct 2020
1.16.3Forge, Fabric8+declared10 Sept 2020
1.16.2Forge, Fabric8+declared11 Aug 2020

Download

From J4mc (update)’s own host. Nothing is re-hosted here.

For Minecraft 26.3

Choose the loader you use before downloading.

  • Forge

    0.1.10 · 22 Sept 2026 · j4mc-forge-1.21.1-26.2-full-0.1.10.jar

    Get Forge

Most recently published release

0.1.11release18 Oct 2026

j4mc-fabric-1.21.11-full-0.1.11.jar · 1.0 MB · for 1.21.11 · Fabric

Download this release
1ed13054042c…
Older versions1
  • 0.1.1022 Sept 202626.3, 26.2, 26.1.2, 26.1.1, 26.1 +11 more1.0 MB189af56231ac…Get

Frequently asked

Does J4mc (update) work on Minecraft 26.3?

Yes. 26.3 is the newest Minecraft version J4mc (update) 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 J4mc (update) support?

Everything the author has declared, from 1.16.2 up to 26.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install J4mc (update) on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does J4mc (update) support?

Forge, Fabric. 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 J4mc (update)?

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 licence is J4mc (update) under?

LicenseRef-All-Rights-Reserved, 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 J4mc (update)?

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 J4mc (update) 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.

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Details from Modrinth, where the author last updated it on 18 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? .