Minecraft Structure Tools · Updated August 2026

By the ChunkScan Team

Minecraft Trial Chamber Finder

Trial chambers are large underground structures added in Minecraft 1.21, built from copper and tuff and filled with trial spawners and vaults. This finder maps them for any seed, entirely in your browser, so your seed is never sent to a server. Trial chambers generate deep underground, so the map marks the chamber origin — dig near the marker to reach the rooms. Positions differ between Java and Bedrock for the same seed, so pick your edition first.

Top matching seeds

java 26.1

9159856986284603422 Taiga · -864, 288 Treasure (81b), Trial Chambers (147b), Ruined Portal (182b)

java 26.1

-8038440838608340059 Snowy Taiga · -128, 32 Treasure (35b), Treasure (68b), Treasure (92b)

java 26.1

-57581433224712905 Forest · -320, 208 Ocean Ruin (128b), Trial Chambers (151b), Ocean Ruin (160b)

Sponsored

java 26.1

-9062506624865699348 Snowy Plains · -16, 544 Ruined Portal N (76b), Shipwreck (113b), Ocean Ruin (192b)

java 26.1

-2387621165689962234 Forest · -144, 80 Trial Chambers (93b), Shipwreck (131b), Ocean Ruin (157b)

java 26.1

-185876177193250947 Jungle · -576, -496 Ocean Ruin (101b), Bastion (107b), Ruined Portal (178b)

java 26.1

7134849039881248338 Jungle · 0, 0 Bastion (81b), Trail Ruins (86b), Treasure (156b)

java 26.1

-9099877449441660895 Plains · 0, 0 Treasure (59b), Ocean Ruin (144b), Shipwreck (147b)

java 26.1

-1539262560889984157 Snowy Plains · 16, 208 Village (16b), Shipwreck (102b), Bastion (102b)

java 26.1

-7894361829971204666 Old Growth Pine Taiga · 80, -608 Ruined Portal (80b), Ocean Ruin (81b), Shipwreck (222b)

What is a trial chamber?

Trial chambers are large underground structures added in Minecraft 1.21. Built from copper and tuff deep in the world, each one is a network of rooms holding trial spawners that summon waves of mobs when you approach. Clear the waves and the spawner drops rewards, while vaults scattered through the chamber unlock with trial keys for extra loot.

Where trial chambers generate

Trial chambers generate underground, usually between about Y=-40 and the deepslate layers, so you almost never see one from the surface. Enter your seed above and the map marks the chamber origin; dig straight down nearby or tunnel in from a cave and you will hit the copper-and-tuff walls that give the structure away.

Trial spawners, vaults and the Mace

Ordinary trial spawners drop consumables and the odd enchanted item. The real prize is the ominous variant: drink an ominous bottle before you start and the spawners turn ominous, the fights get harder, and ominous vaults can drop the heavy core needed to craft the Mace — the strongest single-hit weapon in the game. A seed with a trial chamber near spawn is the fastest route to one.

Java and Bedrock

Trial chambers exist in both editions, but their positions differ between Java and Bedrock for the same seed, so pick your edition above before you read coordinates off the map. The internal loot and mechanics are the same on both platforms.

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