jacobsjo's Tools and Projects

Welcome to my collection of all the Minecraft tools I've worked on, as well as minor and other projects. Display and edit biome layouts, debug structure generation, and design terrain using density functions! Feel free to also check out the source code on GitHub.

If you find my tools useful, I would appreciate a tip!
Buy me a Coffee or Sponsor me on GitHub

map logo Datapack map
A map showing biomes as different colors and markers for structures. Some shading is done to show terrain.
A map to display Minecraft biome layout, terrain, and structure locations of Minecraft worlds. Made deliberately to support custom worldgen datapacks, such as Terralith.
Help Translate Datapack Compatability (Wiki) View Source on GitHub
Windy sun position plugin
This image consists of two parts. On the left there is a part of a timeline, going top to bottom showing times of the sunrise, blue and golden hour and nautical twilight. On the right there is a map showing the surrounding of Insbruck with a marker with multiple dashed lines going in different directions.
→ Sun and Moon position → Install plugin

A plugin for windy.com that shows the directions of the sun and moon. It also gives sunrise, sunset, golden hour, and other timings.
Community Post View Source on GitHub
snowcapped logo Snowcapped
A section of the snowcapped editor. Split into two parts. On the left a grid is seen where each cell contains another grid filled with colors. The right shows a map where the colors represent different biomes.
An editor for complex multi-noise biome configurations in Minecraft. Based on the vanilla overworld configuration setup, this editor allows the easy creation of 6-dimensional biome layouts.
Legacy 1.18 version Documentation (Wiki) View Source on GitHub
A jigsaw block as a logo. Jigsaw previewer
Parts of a plains village during generation on hilly terrain. The jigsaw blocks are still visible. A street is marked with a green outline. Other houses connecting to the street are shown with red and blue outlines.
A previewer for Minecraft structure generation from jigsaw setups. Allows for debugging of generation issues, such as bounding box intersections.
View Source on GitHub
Density function editor
Parts of a visual flow diagram. The test is unreadable, so that only the general structure is visible: Multiple nodes that are connected with edges. On one of the edges a tooltip is open showng an image that is mostly white and red but contains a few black spots, indicating caves.
A visual-flow-based editor for Minecraft density functions. Density functions can be created by connecting individual nodes using edges. Includes 2d visualizations of the density functions.
View Source on GitHub
worldgen devtools logo Worldgen Devtools mod
A Minecraft trial chamber with a number of jigsaw blocks present. The jigsaw blocks have different colors.
A Minecraft mod that aids in the development of world generation data packs and mods. Allows reloading worldgen data packs in-game and resetting chunks and colors jigsaw blocks by name and target.
View Source on GitHub
mojira viewer logo Mojira Viewer
A Minecraft trial chamber with a number of jigsaw blocks present. The jigsaw blocks have different colors. A Minecraft trial chamber with a number of jigsaw blocks present. The jigsaw blocks have different colors.
An unofficial viewer for the Mojang bug tracker. Includes an improved search and allows you to save bookmarks and searches. Issues have a status summary flair in the search results.
View Source on GitHub
lavaflow logo Lavaflow
A Minecraft trial chamber with a number of jigsaw blocks present. The jigsaw blocks have different colors.
A Minecraft data pack/mod that completely overhaules the Nether: Lava rivers on 2 heights with lavafalls between them, proper valleys, oceans, and new biomes and structures.
Modrinth CurseForge View Source on GitHub
MC-Icons
Repository containing images of all Minecraft icons. Auto-created from vanilla resources.
Aquifer explanation
Minecraft uses aquifers to determine where to place liquids and air. This is an explanation of that system.
Deepslate
A javascript library for rendering and emulating parts of Minecraft. Made by misode with significant contributions by me.