Minecraft Trial Chamber Finder
Find every Trial Chamber on your Minecraft seed — Java 26.3 & Bedrock 1.26.51, any seed, free, no sign-up.
Quick answer: Trial Chambers generate underground in the deepslate layer of the Overworld, under almost any biome, and were added in 1.21. They are one of the most common structures: half of worlds have one within 250 blocks of spawn on Java and 250 on Bedrock. This finder marks them at 99% accuracy on Java and 99% on Bedrock.
Where do Trial Chambers generate?
Trial Chambers generate underground in the deepslate layer of the Overworld — roughly between Y ‒40 and Y 30 — and can appear beneath almost any biome. They sit deep enough that you usually reach them by digging down or following a cave system.
How far from spawn is the nearest Trial Chamber?
Close. Across 200 random worlds, half had a Trial Chamber within 250 blocks of spawn on Java and 9 in 10 had one within 350; on Bedrock the same figures are 250 and 350. Nearly every 544 × 544-block area holds one, so a world averages about 10 within 1,000 blocks of spawn. Open a marker for coordinates, dig down to the deepslate layer at that X/Z, and bring Trial Keys for the reward vaults.
| How close | Java 26.3 | Bedrock 1.26.51 |
|---|---|---|
| Half of worlds have one within | 250 blocks | 250 blocks |
| 9 worlds in 10 have one within | 350 blocks | 350 blocks |
| Worlds with one within 1,000 blocks | Every world tested | Every world tested |
| How many within 1,000 blocks, on average | About 10 | About 10 |
Measured with this finder on 200 random worlds in each edition, from the point where each world spawns you. Distances are rounded.
What’s inside a Trial Chamber?
Trial spawners that summon waves of mobs, tougher ominous variants, and vaults you unlock with Trial Keys. Rewards include the Heavy Core used to craft the Mace, plus enchanted gear, emeralds and more.
Does the finder work on Bedrock? Which version added Trial Chambers?
Yes — both editions, Minecraft 26.3 (Java) and 1.26.51 (Bedrock). Trial Chambers arrived in 1.21 on both. Markers read 99% accurate on Java and 99% on Bedrock.
What loot is in trial chamber vaults?
Vaults hold the best loot in the chamber, and they are the reason to bring Trial Keys: a vault is opened with a key rather than looted like a chest, and it pays out once per player, so a chamber is worth visiting with friends. There are two tiers — ordinary vaults, and ominous vaults that only unlock with an Ominous Trial Key earned from an ominous trial — and the ominous table is the better one. Diamonds turn up in both; the exact per-vault chance is on the Diamond Finder, and the likeliest items overall are in the loot highlights below.
Trial Chamber at a glance
| Generates in | Spacing / separation | Version added | Finder accuracy |
|---|---|---|---|
| Underground in the deepslate layer (almost any Overworld biome) | Nearly every 544 × 544-block area has one | Java 1.21 · Bedrock 1.21 | 99% (Java & Bedrock) |
What's inside: Trial spawners, vaults opened with Trial Keys, Breeze and Bogged mobs, and rewards including the Heavy Core for the Mace
Marker precision
| Java | Exact centre — verified July 2026 |
|---|---|
| Bedrock | Area estimate — the marker points into the structure's area |
What it is built from
Built from 100 different blocks — 12 of them are listed here.
