COOKIE TOOLS · GUIDES

Minecraft Java Structure Finder

Find swamp huts, igloos, ocean ruins and shipwreck start chunks from a Java 1.21.11 seed. Explore bounded regions with verified placement and biome checks.

FreeNo sign-upBrowser-basedJava 1.21.11 data

Your result

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Copy-ready output

How to use

Enter a seed, choose one of four verified structure types, center and region radius. Inspect the sorted start chunks and export coordinates.
Placement and biome viability for all four types matched 3,200 official Java 1.21.11 structure-start checks across eight seeds; the engine does not use an approximate terrain check for these four types.

Examples

Negative coordinates

Region coordinates use floor division, including west/north of zero.

Search radius 0

Checks the center region only; an empty result means no biome-valid start there.

Supported versions & limitations

Verified Java dataset: 1.21.11

Normal vanilla Java 1.21.11 Overworld only, four supported types, radius ≤8 regions. Coordinates identify start chunks, not exact entrances, templates or loot. Other structures, Bedrock and changed datapacks are unsupported.

Frequently asked questions

Which versions and scope does this tool support?

Normal vanilla Java 1.21.11 Overworld only, four supported types, radius ≤8 regions. Coordinates identify start chunks, not exact entrances, templates or loot. Other structures, Bedrock and changed datapacks are unsupported.

How is the result checked?

Placement and biome viability for all four types matched 3,200 official Java 1.21.11 structure-start checks across eight seeds; the engine does not use an approximate terrain check for these four types.

Sources

Facts reviewed 2026-10-16. Supported scope and preview limitations are described above.