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Modpack Update CheckerMinecraft mod for 1.21.6

An update checker designed for modpacks!

newest supported release 1.21.6Utility
Latest version
0.15.6
Minecraft
1.16.5 to 1.21.6
Java
Java 21+
Loaders
Fabric, NeoForge, Quilt, Forge
Licence
CC-BY-NC-ND-4.0
Downloads
4.4M
Updated
16 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Modpack Update Checker servers

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

  • 1.21.6
  • Fabric
  • NeoForge
  • Quilt
  • 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 Modpack Update Checker declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.6Fabric, NeoForge, Quilt, Forge21+declared17 Jun 2025
1.21.5Forge, Quilt, NeoForge, Fabric21+declared25 Mar 2025
1.21.4Forge, Quilt, NeoForge, Fabric21+declared3 Dec 2024
1.21.3Forge, Quilt, NeoForge, Fabric21+declared23 Oct 2024
1.21.1NeoForge, Quilt, Forge, Fabric21+declared8 Aug 2024
1.21Fabric, Quilt, NeoForge, Forge21+declared13 Jun 2024
1.20.6Forge, Quilt, NeoForge, Fabric21+declared29 Apr 2024
1.20.5Forge, Quilt, NeoForge, Fabric21+declared23 Apr 2024
1.20.4NeoForge, Quilt, Fabric, Forge17+declared7 Dec 2023
1.20.3NeoForge, Fabric, Forge, Quilt17+declared4 Dec 2023
1.20.2Fabric, Quilt, NeoForge, Forge17+declared20 Sept 2023
1.20.1Forge, Quilt, NeoForge, Fabric17+declared12 Jun 2023
1.20Forge, Quilt, NeoForge, Fabric17+declared2 Jun 2023
23w14aForge, Quilt, NeoForge, Fabric17+declared5 Apr 2023
1.19.4Forge, Quilt, NeoForge, Fabric17+declared14 Mar 2023
1.19.3Forge, Quilt, NeoForge, Fabric17+declared7 Dec 2022
1.19.2Forge, Quilt, NeoForge, Fabric17+declared5 Aug 2022
1.18.2Forge, Quilt, NeoForge, Fabric17+declared28 Feb 2022
1.16.5Forge, Quilt, NeoForge, Fabric8+declared14 Jan 2021

Download

From Modpack Update Checker’s own host. Nothing is re-hosted here.

Most recently published release

0.15.6beta22 Jun 2025

modpack-update-checker-1.21.6-fabric-0.15.6.jar · 0.4 MB · for 1.21.6 · Fabric

Download this release
fd66d2af3ddf…
Older versions2
  • 0.15.512 Jun 20251.21.50.4 MB32 downloadsef703e7250c4…Get
  • 0.15.426 Jan 20251.21.40.4 MB25.6k downloadse8390e7874c1…Get

Frequently asked

Does Modpack Update Checker work on Minecraft 1.21.6?

Yes. 1.21.6 is the newest Minecraft version Modpack Update Checker 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 Modpack Update Checker support?

Everything the author has declared, from 1.16.5 up to 1.21.6. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does Modpack Update Checker support?

Fabric, NeoForge, Quilt, 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 Modpack Update Checker?

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 licence is Modpack Update Checker under?

CC-BY-NC-ND-4.0, 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 Modpack Update Checker?

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 Modpack Update Checker 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.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Details from Modrinth, where the author last updated it on 22 Jun 2025. 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? .