DatapacksJava
OldYLevels
Java data pack listed for Minecraft 1.18–1.21. Downloads from the MC Java Mods app on Android.
Changes the Overworld height to the old Y range, 0-256. This will basically crop off parts of your world if you don't pregenerate the world on an earlier…
⬇ Download on ModrinthOldYLevels
Change the Overworld's Y range back to the old 0-256 range.
That's it! Just put it in your world/datapacks/ folder or load it locally and it will work.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.18, 1.18.1, 1.18.2
- 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 Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
File checked by MCModsHub
- Downloads as OldYLevels-1.1.zip
- Download size: 1 KB
- Download link checked 7 Nov 2026 — working
These come from our own check of the pack file, not from the source page.