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Vertical Slabs CompatMinecraft mod for 1.21.1

Adds automatic compatibility for Quark's Vertical Slabs

client and servernewest supported release 1.21.1UtilityDecoration
Latest version
1.21.1-3.0
Minecraft
1.19.1 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge
Licence
LicenseRef-All-Rights-Reserved
Downloads
1.2M
Updated
2 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Vertical Slabs Compat servers

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

  • 1.21.1
  • Fabric
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Vertical Slabs Compat declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.20.1Fabric, Forge, NeoForge17+declared12 Jun 2023
1.19.2Fabric, Forge, NeoForge17+declared5 Aug 2022
1.19.1Fabric, NeoForge, Forge17+declared27 Jul 2022

Download

From Vertical Slabs Compat’s own host. Nothing is re-hosted here.

Most recently published release

1.21.1-3.0release24 Aug 2026

v_slab_compat-1.21.1-3.0-fabric.jar · 90 KB · for 1.21.1 · Fabric

Download this release
025eca05e51e…
Older versions12
  • 1.20-2.515 Jan 20251.20.193 KB23.2k downloads701bdbcb150f…Get
  • 1.20-2.44 Sept 20241.20.191 KB179.9k downloads4afa878be6c6…Get
  • 914 Mar 20231.19.282 KB32.0k downloadsf97eb37a1b7b…Get
  • 814 Mar 20231.19.2, 1.19.185 KB37.4k downloads0867759d0ef4…Get
  • 714 Mar 20231.19.2, 1.19.182 KB177 downloads525493345ec1…Get
  • 614 Mar 20231.19.2, 1.19.185 KB160 downloadsa60f4b962d87…Get
  • 514 Mar 20231.19.2, 1.19.184 KB141 downloadse48e0613da8b…Get
  • 414 Mar 20231.19.2, 1.19.181 KB140 downloads0676e286e3cb…Get
  • 314 Mar 20231.19.2, 1.19.181 KB157 downloadsf65c3f604b4f…Get
  • 214 Mar 20231.19.2, 1.19.184 KB164 downloads12d399ec663f…Get
  • 114 Mar 20231.19.2, 1.19.152 KB156 downloads517fdc9f9ca7…Get
  • 014 Mar 20231.19.2, 1.19.154 KB163 downloads8bd00b76352a…Get

Dependencies

What Vertical Slabs Compatdeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Moonlight LibRequired. dynamic data pack and registration, villager activities, custom map marker and a lot moreQuarkOptional. A Quark is a very small thing. This mod is a collection of small things...

Frequently asked

Does Vertical Slabs Compat work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Vertical Slabs Compat 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 Vertical Slabs Compat support?

Everything the author has declared, from 1.19.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Vertical Slabs Compat 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 Vertical Slabs Compat support?

Fabric, 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 Vertical Slabs Compat?

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 does Vertical Slabs Compat need to run?

It declares Moonlight Lib as required, so that has to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Vertical Slabs Compat 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 Vertical Slabs Compat?

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 Vertical Slabs Compat 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.

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 Modrinth, where the author last updated it on 24 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? .