Custom World Height+
Custom World Height+ lets a server owner change the height limits of the Overworld, Nether and End through commands, with each dimension set separately.
What it does
The mod changes the build height and minimum Y of each dimension at the fundamental level, so a taller Overworld can be created or the Nether and End can be adjusted to fit a world's generation needs. Each dimension has its own configurable height entry, and changing a value through a command saves it automatically to the configuration file.
Height limits are meant to be set before a new world is generated, because existing chunks were built against the old limits. A world opened with a height setting different from the one it was generated with may break, and a changed height takes effect only once the game has fully restarted. Installing Fabric API is required and following the setup instructions is essential to avoid world-generation problems. The environment is server-side only, so players join without installing it, and the code is under the CC0 1.0 Universal license, but the project is not open source in the sense of a repository with published source.
Key features
Per-dimension height limits
The Overworld, Nether and End each have their own height settings, so one can be taller without affecting the others.
Command-based changes
Height limits are changed with simple commands, with no need to edit files by hand during play.
Automatic saving
Each change is written to the configuration file as soon as the value is set, so settings persist between restarts.
Lightweight implementation
The mod is described as a simple, lightweight implementation that only touches the dimension height handling.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who want to change dimension height limits on a Fabric server, ideally before generating a new world, and who can follow the setup warnings closely.
How it compares
NotHighEnough is server required, with client optional, for Fabric 1.17 – 1.21.11 and is not open source under All rights reserved. Increased World Height is client and server for Fabric 1.20.1 – 1.21.11 under the MIT License and is open source. Higher Heights covers Fabric, Forge, NeoForge and Quilt for 1.17 – 26.3 with the server required and the client optional.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Custom World Height+ | Fabric | 1.21.6 – 26.3 | Server-side only | 2026-10-12 |
| NotHighEnough | Fabric | 1.17 – 1.21.11 | Server required, client optional | 2026-01-02 |
| Increased World Height | Fabric | 1.20.1 – 1.21.11 | Client and server | 2026-07-23 |
| Higher Heights | Fabric, Forge, NeoForge and Quilt | 1.17 – 26.3 | Server required, client optional | 2026-09-16 |
Questions
Does Custom World Height+ need Fabric API?
Does a player need the mod installed?
Why should height be set before generating a world?
Which game versions does Custom World Height+ support?
In the catalog
Custom World Height+ is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 8,071 mods support Minecraft 26.3.
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What the author says
Customize the height limits of Minecraft dimensions with simple commands. Create taller Overworlds, expand the Nether, or adjust the End to fit your world-generation needs. ⚠️ Read carefully before using this mod.
Official listing
- Modrinth page
- modrinth.com/mod/custom-world-height-plus
- Owner
- hindustani_gamer_fardin
- Published
- 2026-06-13
- Updated on Modrinth
- 2026-10-12
- Facts verified
- 2026-10-15