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AboutRUNS IN YOUR BROWSER
Minecraft world tools
Read the seed and spawn point from a world file, find slime chunks, build a Java superflat preset or locate a stronghold from Eye of Ender throws.
Every tool runs in your browser, and world files you open stay on your device. Seed-based results are model predictions unless a page says they were checked in game. How we check seeds
Page updated
Seed experience calculator
Compare the modeled biome families and structure types within a chosen radius of estimated Overworld spawn. The version-aware Discovery Index gives nearby discoveries more credit.
The comparison uses a 1,024-seed model sample in Java 26.3 or Bedrock 26.50; How the index is designed explains how the score and sample were built.
Nether portal calculator →Loading tools…
Ore finders
Find seed-based places to inspect for diamonds and ancient debris in Java 26.3. Sampled origins have been checked in game; nearby ore is a separate measurement. These outputs remain placement predictions with finite coverage.
- Diamond finderJava 26.3 · Overworld · First placement attempts
- Ancient-debris finderJava 26.3 · Nether · Placement origins
- Reviewed ore measurementsOrigin matches, nearby block hits and fixture limits
What the ore results mean explains why a placement origin that matches the game can still have no ore nearby, and how to use the predictions when you dig.
Biome finders
Choose a biome in your existing seed to find nearby sampled locations, or search across seeds for a combination of biomes and structures.
- Biome finderJava · Bedrock · Overworld, Nether and End
- Minecraft seed finderSearch for new seeds with your conditions
The lush cave finder samples several underground heights and lists predicted lush-biome areas with height bands to inspect. It can miss unsampled pockets and does not identify open caves or entrances.
Our Lush cave finder comparison checked its predictions against the game in both editions, including a Bedrock correction and a fresh check afterwards.
Structure finders
Enter your seed to list the nearest structures to world spawn or to your coordinates, with distance and direction.
Each finder page also shows how far that structure was from spawn across 14,000 sampled seeds. Our Java finder accuracy review and Bedrock structure comparison compare finder results with the game; the research page lists every study.
Overworld
- Village finderJava · Bedrock
- Pillager outpost finderJava · Bedrock
- Witch hut finderJava · Bedrock
- Igloo finderJava · Bedrock
- Woodland mansion finderJava · Bedrock
- Desert temple finderJava · Bedrock
- Jungle temple finderJava · Bedrock
- Abandoned camp finderJava · Bedrock
- Pale garden camp finderJava · Bedrock
- Ruined portal finderJava · Bedrock
- Trail ruins finderJava · Bedrock
- Ocean monument finderJava · Bedrock
- Ocean ruins finderJava · Bedrock
- Shipwreck finderJava · Bedrock
- Buried treasure finderJava · Bedrock
- Ancient city finderJava · Bedrock
- Trial chamber finderJava · Bedrock
- Mineshaft finderJava · Bedrock
- Stronghold finderJava · Bedrock
The Nether
The End
Other map layers
Each link opens the map with that layer turned on. Enter your seed and generation version there. Some layers exist in only one edition, and a layer's name says when it shows candidates or uses a partial model.
Biome finder →Overworld
- Estimated world spawnJava · Bedrock
- Slime chunksJava · Bedrock
- Desert wellsJava · Bedrock
- Amethyst geode candidatesJava · Bedrock
- Ravine starting pointsBedrock
- Surface lava-lake candidatesBedrock
- Dungeon predictions (partial model)Bedrock
- Cave carver starting chunksJava
- Ravine carver starting chunksJava
- Ore-vein noise samples at selected YJava
- Enchanted apples in desert templesJava
The Nether
The End
What each tool answers
Seed map and seed finder
The seed map answers what is in a seed you already have: biomes, predicted structures and slime chunks in Java or Bedrock, across the Overworld, Nether and End. The seed finder answers the opposite question, which seed has what you want, by testing seeds against the biomes and structures you choose.
Your world's save data
If you do not know your seed, open data/minecraft/world_gen_settings.dat for Java 26.1 and later, or level.dat for older Java versions and Bedrock, in Read your world data. It reads the seed and any included spawn or version data on your device. Java spawn chunks then shows which chunks the spawn ticket keeps loaded in your Java version; Java 1.21.9 removed permanent spawn chunks.
Slime chunks
Find slime chunks checks a 9 × 9 chunk area around a block position, in Java or Bedrock. Java slime chunks depend on the seed, while Bedrock slime chunks are the same in every seed. Search for a slime pattern works the other way round: it finds Java seeds whose slime chunks match a pattern you draw, which helps when you plan a slime farm.
Building and travel
Build a superflat preset stacks layers from the bottom up and gives you a code for the Java Superflat customization screen. Triangulate a stronghold estimates a stronghold's X and Z from two Eye of Ender throws, with no seed needed. The Nether portal calculator converts coordinates between the Overworld and the Nether, where one block covers eight Overworld blocks.
The block reference lists block properties by data version, from community data that we have not checked in the game.