Minecraft Seed Analyzer
Enter a world seed to calculate its numeric value, stronghold ring distances, slime chunk locations, and spawn region information.
Embed This Tool
Put the seed map viewer on your own site or server wiki.
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How to read a Minecraft world seed
Paste the seed
A number is taken as it stands. Text is hashed into the number the game itself would use, and both forms are shown.
Read the spawn region
The analyser prints the region the world spawn falls in, which is an area rather than a guaranteed block.
Check the stronghold rings
The ring distances say how far out to travel before throwing an eye of ender is worth the ender pearl.
Test a slime chunk
The slime chunk checker answers per chunk coordinate, using the same test the game runs when it decides to spawn slimes.
How It Works
Visualize biome maps from a world seed.
Java Edition 26.2Checked on against the eight stronghold rings from strongholds.jsonPage updated
How to Use the Minecraft Seed Analyzer
Enter your world seed in the input field. This can be a numeric seed (positive or negative) or a text string. If you enter text, the tool calculates the Java hashCode value, which is the same formula Minecraft uses to convert text seeds into numbers. This means you get the exact same numeric seed that Minecraft would generate from your text input.
After analysis, you see the seed information section showing your original input, whether it was text or numeric, the final numeric seed value, and spawn region information. The spawn region is always within 128 blocks (8 chunks) of the world origin at coordinates 0, 0 in the overworld. The exact spawn point depends on terrain generation. Since spawn falls within 128 blocks of 0, 0, the first Nether portal usually lands close to the origin too: the coordinate converter does the 8 to 1 arithmetic for the tunnel between them.
The stronghold ring table shows all 8 rings where strongholds generate. The first ring at 1408 to 2688 blocks contains 3 strongholds evenly spaced. Each subsequent ring is farther out and contains more strongholds, up to 128 total. These distances are measured in blocks from the world origin and apply to all Java Edition worlds regardless of seed.
The slime chunk checker lets you test specific chunk coordinates. Enter the chunk X and Z values (divide your block coordinates by 16 and round down) to check if that chunk is a slime chunk. The tool uses the exact same random number generator formula that Minecraft Java Edition uses, so results are 100% accurate for your seed.
Common Use Cases
Players building slime farms need to find slime chunks near their base. The visual grid display shows all slime chunks in a 17x17 area so you can quickly identify clusters where building a farm would be most efficient. Server administrators check seeds to plan stronghold access and ensure players can locate end portals.
Speedrunners and technical players use seed analysis to plan routes and understand world structure. The text-to-number conversion is particularly useful when sharing seeds between players who may not know that Minecraft converts text seeds internally. By comparing numeric values you can verify that two players are using identical world generation. A seed only becomes a world once it sits in level-seed, one line of the file the server.properties generator writes, and any point you pick off the map falls in a chunk the chunk border visualizer can name.
What a seed actually is
| The number | A 64 bit signed whole number. Every world is one of those, whether you typed it or let the game roll it. |
|---|---|
| Text seeds | Text is hashed into a 32 bit number first, so typing words can only ever reach a small slice of the full range. |
| Where to find yours | The seed command in game, or the world options screen. It is stored in level.dat, so a copied world keeps it. |
| Java against Bedrock | The same number gives two different worlds. The generators are separate implementations and were never meant to agree. |
| Version matters | Overworld generation was rebuilt in 1.18. A seed you saw in a 1.16 video does not produce that landscape any more. |
| Structures | Structure placement follows the seed plus the rules of the version you are on, so a village can move or vanish between updates on the same seed. |
The eight rings were recomputed on 8 August 2026 out of strongholds.json as version 26.2 ships it, a file that sets 128 strongholds, a ring distance of 32 chunks and a spread of 3. Those three numbers give 3, 6, 10, 15, 21, 28 and 36 strongholds per ring with the last 9 in the eighth, and a first ring of 1408 to 2688 blocks that moves 3072 blocks outward every time.
What a worded seed gives up, and how often slime turns up
Two calculations sit under this page. One turns a word into a number, the other decides whether a chunk breeds slimes. Both are worth seeing written out, because the first quietly shrinks your world count and the second is easy to mistake for luck.
a word is folded with hash = hash x 31 + the next letter, kept to 32 bitsso words reach 4,294,967,296 worlds out of the 18,446,744,073,709,551,616 a number reachesa chunk breeds slimes when a seeded random draw of ten lands on zeroOne in 4.29 billion of the range is still 4.29 billion worlds, so a word is not a bad seed. It does mean two different words can land on the same world, and at roughly 77,000 worded seeds it is more likely than not that two of them already have.
Frequently Asked Questions
Questions about seeds
Why does my world not match the map here?
Almost always the version or the edition. A Bedrock world will never match a Java map on the same number, and a Java world made before 1.18 has different terrain from one made after it.
Can I change the seed of a world I already play?
Not for terrain that is already generated. Editing the seed in level.dat only affects chunks that have not been created yet, which leaves a hard seam where the old world ends.
Do words work as seeds?
Yes, and they are convenient to share, but they are hashed down to a 32 bit value. Every text seed lands in the same narrow band of the range, so pure numbers reach worlds that words cannot.
Is seed 0 special?
No. It is a perfectly ordinary seed and it is what you get if the field is left empty in some launchers, which is why it feels familiar to a lot of players.
