How do I install OneLayer?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does OneLayer work with?

The listing gives Minecraft 1.21.11, 1.21.1, 1.20.1. This is the version stated by the author or source site, not something we verified ourselves.

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OneLayer

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by SirDrake2 · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader NeoForge2 builds
Mod loader Forge1 build

Minecraft version

Minecraft 1.21.11Newest
Minecraft 1.21.1

Minecraft 1.20.1Newest

⬇ Download for 1.21.11 · NeoForge ⬇ Download for 1.21.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

This mod generates a flat world that includes all the biomes and structures of a regular world.

It allows you to recreate a superflat world while still being able to experience a full adventure within it.

🛠 Configuration

A configuration file named onelayer-common.toml can be found in the config folder or directly in-game, it allows you to adjust world generation and certain behaviors to better fit your adventure, server, or modpack.

🌳 Server :
You can test it by adding the following parameter to your server.properties file:

level-type=onelayer\:onelayer

It’s recommended to add this parameter before creating your world.

🌴 Client :

Select One Layer on generation type

⚒ Informations

📜 If you're interested in using it or feel some features are missing, feel free to contact me, I'm open to feedback and suggestions ! Join my Discord or contact me directely via CurseForge.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.11, 1.21.1, 1.20.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as onelayer-0.1.4.jar — drop this file into the mods folder
Download size: 18 KB
Download link checked 2 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21 Java mods for 1.20