Netherite Finder
Find ancient debris locations by seed. Shows exact spawn positions overlaid on Nether terrain at y=15 for Minecraft Java 1.21+.
Advanced...
This tool takes a terrain snapshot at y=15 and shows you all netherite clusters between y=5 and y=25 (where ancient debris is most common).
These default y-values can be adjusted by clicking Advanced... just above the map.
Cluster counts (×1, ×2, ×3) show the maximum possible blocks per spawn — still working on some fixes to make those counts fully accurate.
Calculating 1,000+ ancient debris placements is quite intensive. So beware zooming out too much if you're on old hardware.
Right-click any debris icon to mark it as mined — it'll fade out so you can track what you've already collected.
I believe the most efficient mining strategy is to dig (or explode) long tunnels at y=15. Each icon on the map contains one rectangle per ancient debris block in the cluster, so determine rich spots by finding areas of many rectangles.
Right-click on the map to place waypoints — useful for marking mining paths or visited clusters.
Use this map to plan your exploding tunnels through hotspots of debris, all while avoiding the massive lava lakes.
Spawn origin positions are accurate to within ±1 block of vanilla generation. Cluster counts represent the maximum possible blocks before air exposure culling.
Lava lakes generated from biomes or cave carvers are not calculated or displayed on this map.
Currently only supports Java 1.21+ seeds. It might work for some other recent Java versions. Support for 1.18–1.20 and Bedrock edition is planned.
Terrain data via the cubiomes library. Debris algorithm based on decompiled Minecraft 1.21 source (Mojang mappings) via DecompilerMC.
A Harrison Bored project.
