Datapack
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Keyboard shortcuts
| drag | Pan map |
| scroll | Zoom (1px=64m … 8px=1m) |
| right-click | Copy /tp command at cursor |
| H / 0 | Home: (0, 0) at 1:4 |
| R | Random seed |
| G | Toggle chunk grid |
| M | Toggle measure tool |
| Esc | Exit measure / close modal |
| ? / / | Show this help |
| Shift+Alt+drag | Rotate map (compass to reset) |
What's where
- Top toolbar — Seed, Goto, Dimension, Grid, Measure, Find nearest, ?
- Left sidebar — Overlays (Slime Chunks, Stronghold Rings) + Structures filter
- Right panel — Seed Finder (multi-criterion AND search)
- Bottom-left — live status (seed, dimension, camera)
- Bottom-right — scale "1px = Nm" + ruler
- URL hash auto-syncs seed + cam + zoom + filters; copy from address bar to share
Seed Finder Tips
Use rare constraints first, then add common structures around them.
Strongholds
- 128 total, in 8 rings. Ring 1 starts around 1,280-2,816 blocks from spawn.
- Strongholds do not generate under Ocean biomes.
Structures
- Many structures have biome rules: Witch Hut needs Swamp, Igloo needs Snowy, Desert Pyramid needs Desert.
- Village placement is grid-spaced; two villages of the same type rarely sit in adjacent chunks.
- Pillager Outpost cannot be too close to a Village.
- Ocean Monument needs Deep Ocean around it.
- Ancient City, End City, and Nether Fortress require the matching dimension.
- Trial Chamber requires 1.21+ and Trail Ruins requires 1.20+.
Biomes
- Lush Caves, Dripstone Caves, Deep Dark, and Sulfur Caves (26.2+) are underground-only. Search at Underground or Y -51.
- Mushroom Fields is rare; expect longer searches.
- M biome variants are rarer than their base biome.
Speed tip: start with the rarest criterion and radius 2k-4k. If 30s returns 0 hits, the rule is probably too strict.
Strongholds
- Bedrock has exactly 1 stronghold per world, ring 640-1,152 blocks. Searching for 2 strongholds is impossible.
Structures
- Biome and grid rules are similar to Java, but fewer structure types are available.
- Trial Ruins needs 1.20+, Trial Chamber needs 1.21+, and Ancient City needs 1.19+.
- 26.0-26.32 share the same RNG path; picking any of those versions gives identical supported finder results.
- Witch Hut needs Swamp, Ocean Monument needs Deep Ocean, and Pillager Outpost is not near Village.
- Buried Treasure appears on Beach and Stony Shore only.
Biomes
- 3D biome searches use the same Y-height idea as Java.
- Bedrock biome layout differs from Java; do not expect identical seeds across editions.
Speed tip: Bedrock searches are usually faster because the supported structure set is smaller.
Good starter searches (both editions)
Village near spawn · Ruined Portal + Village ≤ 1k · Pillager Outpost + Mansion ≤ 3k · Ocean Monument + Shipwreck ≤ 1.5k.
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Datapacks experimental
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Drag a worldgen datapack ZIP here
or click to select a file
Seed map for datapacks may have inaccuracies and only supports
Java 1.20+ overworld with multi-noise biome generators.
Try: Terralith,
Tectonic,
Continents,
Lithosphere.
👋 Drag to pan · scroll to zoom · click 🎲 for random seed · press ? for full help
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How seeds, biomes and structures actually work — finding villages fast, what differs between Java and Bedrock, and how slime chunks are decided.
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