Simple World Hight
by crqzycat
Simple World Hight raises the build height of a world on Fabric, letting a 1.21.1 world generate terrain above and below the vanilla limit once it is set up.
What it does
The mod lets a dimension extend its build height upward, and a config option can also raise the height toward a chosen target, snapped down to a step of 16. It only ever raises the height and never lowers it, so other worldgen mods and datapacks keep their own values. A player who sets a height that another mod already exceeds gets the larger value, with a log line that explains why.
Settings are written to a single config file, and a World Height button on the world creation screen offers presets. Existing worlds keep their generated height by default through the lockToWorldValues option, and a height.json record is written inside the world folder. Changing the height of a world that is already generated leaves cut-off chunks and lost data, so the mod warns when a later start finds a difference. The mod is published for Fabric 1.21.1 only, and Fabric API is required; the environment is client and server, so the server and every player need it.
Key features
Dimension build height
Raises the build height of each dimension separately, keyed by dimension type and world ID.
Upward-only changes
Values are only raised and never lowered, so the bottom of the world and its cave and ore generation stay unchanged.
World creation presets
A World Height button on the world creation screen offers presets before the world is generated.
Locked values for existing worlds
Existing worlds keep their generated height by default, and a warning appears when the config no longer matches the saved record.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Who it’s for: Players and server owners who want a taller build range in 1.21.1 worlds, and who accept that the height is fixed once terrain has generated.
How it compares
Mega World Height is a Fabric mod for 1.21.1 – 1.21.11 that is server-side only and is not open source, under the MIT License. Increased World Height is open source under the MIT License, runs on Fabric 1.20.1 – 1.21.11, and is installed on both client and server. NotHighEnough runs on Fabric 1.17 – 1.21.11, with the server required and the client optional, and is under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Simple World Hight | Fabric | 1.21.1 | Client and server | 2026-07-27 |
| Mega World Height | Fabric | 1.21.1 – 1.21.11 | Server-side only | 2026-06-13 |
| Increased World Height | Fabric | 1.20.1 – 1.21.11 | Client and server | 2026-07-23 |
| NotHighEnough | Fabric | 1.17 – 1.21.11 | Server required, client optional | 2026-01-02 |
Questions
Does Simple World Hight need Fabric API?
Do the server and players both need the mod?
Can the height of an existing world be changed?
In the catalog
Simple World Hight is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from crqzycat
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What the author says
Raise the build height of any dimension — separately, and without fighting your other worldgen mods. Whatever another mod or datapack has already set is treated as the floor. Ask for 512 in a Nether that Amplified Nether already runs at 640, and you get 640 plus a log line explaining why. The rule is enforced in…
Official listing
- Modrinth page
- modrinth.com/mod/simple-world-hight
- Owner
- crqzycat
- Published
- 2026-07-27
- Updated on Modrinth
- 2026-07-27
- Facts verified
- 2026-10-15