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Compat StructureMinecraft mod for 1.21.1

Adds structures to popular mods. Create, Alex's Caves, Ice and Fire and etc.

client and servernewest supported 1.21.1AdventureMobsDecorationWorldgen
Latest version
1.0.3
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Fabric, Forge, NeoForge
Licence
MIT
Downloads
38.3k
Updated
4 mo ago
Available on
Modrinth
Space NodePartner

Host Compat Structure servers

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

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

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, Forge, NeoForge21+declared8 Aug 2024
1.20.1Fabric, Forge, NeoForge17+declared12 Jun 2023

Download

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

1.0.3release20 Mar 2026

compatstructures-1.0.3.jar · 3.6 MB · for 1.21.1

Download latest
e17324d9d3c1…
Older versions3
  • 1.0.219 Sept 20251.21.12.9 MB11.9k downloadsb9a2267d2e30…Get
  • 1.0.113 Apr 20251.20.13.0 MB8.0k downloadsa2e73b301d6b…Get
  • 1.0.02 Apr 20251.20.13.0 MB320 downloads07733a66d7ef…Get

Frequently asked

Does Compat Structure work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Compat Structure 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 Compat Structure support?

Everything the author has declared, from 1.20.1 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 Compat Structure 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 loader does Compat Structure need?

Fabric, Forge, NeoForge. 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 Compat Structure?

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 Compat Structure 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 Compat Structure?

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 Compat Structure 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.

Entity CullingUsing async path-tracing to hide Block-/Entities that are not visibleFerriteCoreMemory usage optimizationsImmediatelyFastSpeed up immediate mode rendering in MinecraftYetAnotherConfigLib (YACL)A builder-based configuration library for Minecraft!Xaero's MinimapDisplays a map of the nearby world terrain, players, mobs, entities in the corner of your screen. Lets you create waypoints which help you find the locations you've marked.[ETF] Entity Texture FeaturesEmissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric

Last checked 8 d 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? .