SeedCracker
For Bedrock Edition
Describe the world you want: pick the structures and where they should generate. SeedCracker returns Bedrock seeds that place them at those coordinates. List at least 4 structures with their block coordinates.
Structures
Optional rows, but strongly recommended: these anchors are what lets the automatic search finish a 64-bit world (the default on modern Bedrock). 0–6 rows — one or two is usually not enough.
Shared by both searches. With exactly 4 anchors stay at 3 or below — looser settings make the anchor lift reject the run (the error tells you).
Advanced
Leave Start/End empty for the automatic search: it sweeps the whole 32-bit space, detects 32-bit worlds by itself and finishes 64-bit worlds with your Trial Chambers anchors. The Time limit, Max results and Max score below all apply to both searches — leave Time limit empty to scan everything. Filling Start or End switches to the manual windowed search below.
How do I use this?
Automatic mode (the default). List your structures and press Find seeds — no seed range. The search sweeps the whole 32-bit space in your browser, checks whether the world is 32-bit or 64-bit, and finishes 64-bit worlds with your Trial Chambers anchors. You get every matching seed ranked, with where each structure actually generates for it. Set a Time limit in Advanced to stop early with partial results — leave it empty to scan everything.
Trial Chambers / Trail Ruins matter. Modern Bedrock worlds use seed far above 4.3 billion, which no sweep can reach on its own — the anchors are what pin the high bits down. List 4 or more of them if you have them; with fewer the search either stops with "add more Trial Chambers…" or cannot finish.
How good the match gets depends on two things: how close your coordinates are to each structure's center, and the tolerance.
Aim for the center of the structure when you copy its coordinates. The engine checks whether a seed generates a structure near the position you give, so the center is the point that lines up best. You can also paste a whole /tp command straight into the X or Z field and both fill in at once.
Tolerance is how far off a coordinate is allowed to be, in chunks (one chunk is 16 by 16 blocks). At 0, the coordinate has to be spot on, and a good list usually pins down a single seed. Raise it and the search accepts structures generated anywhere within that radius around each position, so more seeds survive the check. Rough coordinates want a higher tolerance, exact ones want it low.
Four structures is the minimum, and every extra structure you add narrows the result down.
Manual range search. Open Advanced and set a Start/End window to search only part of the seed space (or a window above 4294967296 for a specific 64-bit candidate), with a time limit and a max score filter. That path uses the classic windowed engine.
Results
No search yet.
Find a Minecraft Bedrock seed by structure layout
SeedCracker reverses the usual workflow. Instead of starting from a seed and asking what is nearby, you describe the world you want - a village here, an ocean monument there - and it returns Bedrock seeds that generate those structures at or near the block coordinates you give. Four structures is the minimum, and each extra structure narrows the result down.
The search sweeps the seed range in parallel inside a native engine and runs entirely in your browser via WebAssembly, so there is nothing to install and no account. For a specific layout, a low tolerance (0-1 chunks) usually pins down a single seed. See the SeedCracker documentation for every parameter, or read how SeedFinder handles the other direction.
Frequently asked questions
How do I find a seed with a village at specific coordinates?
Add a row for Village and enter the X/Z block coordinates where you want it, then add at least three other structures for the same seed. SeedCracker returns Bedrock seeds whose structures line up with those positions.
How many structures do I need to find a seed?
At least four. More structures mean fewer false positives, so the returned seeds are more likely to match exactly.
Can it find 64-bit Bedrock seeds?
Yes. The default automatic search finishes 64-bit worlds on its own: list your structures plus Trial Chambers (24) or Trail Ruins (23) anchors and press Find seeds - no Start/End window needed. The manual windowed search (a Start/End window above 4294967296) is still there for pinning down a specific candidate.
Is SeedCracker free?
Yes. It runs locally in your browser via WebAssembly with no login and no key.