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Modpack Update CheckerMinecraft mod for 1.21.6

An update checker designed for modpacks!

newest supported 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
15 mo ago
Available on
Modrinth
Space NodePartner

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.

0.15.6beta22 Jun 2025

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

Download latest
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 loader does Modpack Update Checker need?

Fabric, NeoForge, Quilt, Forge. A build for one loader will not 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?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

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?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .