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Datapack · active

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Overlays ▾

Biomes

Grid

Slime Chunks

Stronghold Rings

Terrain Shading zoom in

Structures 0 selected ▾

Only a few structures stay accurate in datapack mode.

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Settings ▾

Structures

0 selected

Settings

advanced

Map rotation requires reload

Allows you to rotate the map via Shift+Alt+Drag or two-finger rotation gestures on touch devices.

Fade in biomes soon

Biome tiles fade in instead of popping into place when loaded.

Copy teleport command

Include '/tp' when copying coordinates to the clipboard.

Concurrency requires reload

Number of concurrent web workers to load map data. A higher number may improve performance, but may also increase usage of system resources and battery.

8 Auto

World border

Renders a border outline on the map at the given center + size.

Center

Size

Highlight Biomes

0 selected

Share link

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.
Trail 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.

Datapacks experimental

📁

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

Seed Finder

Finder tools are disabled in datapack mode.

Idle

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