Treasure81 blocks
Trial Chambers147 blocks
Ruined Portal182 blocks
Minecraft Trial Chamber Finder
Minecraft Structure Tools · By the ChunkScan Team · Updated August 2026
Quick answer: To find a trial chamber, enter your world seed on this page and choose Java or Bedrock: the map marks every trial chamber near any coordinates. Chambers generate deep underground, so travel to the marker and dig down. Link straight to a result with /trial-chamber-finder?seed=YOUR_SEED.
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.
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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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