# MineSeedMap

> Explore any Minecraft world by seed. Generate an interactive seed map, find biomes, villages, strongholds, ancient cities and other structures, and share exact coordinates.

MineSeedMap is a Minecraft seed map for Java Edition. A visitor enters a world seed, picks a Minecraft version and dimension, and explores the generated world on an interactive map: biomes, structures, coordinates, and chunk and region geometry.

World generation runs in the visitor's browser through a WebAssembly build of cubiomes. No seed is uploaded, and there is no server-side generation API, so there is no per-seed quota.

The site keeps first-party traffic statistics only: page, referrer, country, browser and device. No IP address is stored, no cookie is set and no fingerprint is taken; repeat visits are counted with a hash that rotates daily. There is no third-party analytics or advertising.

**What is exact.** Bit-exact ports of the vanilla algorithms, with no approximation: structure region candidate positions (the spacing, separation and salt algorithm), slime chunks, seed parsing including Java string hashing of text seeds, and block, chunk, region and Nether coordinate conversion.

**What comes from the generation engine.** Biome sampling and therefore every region shape on the map; surface heights and therefore relief, mountains, valleys and water depth; confirmation that a structure candidate passes its biome and terrain checks; stronghold positions; and the world spawn. Colour and lighting are presentation applied on top of that data and never move a coastline or change an elevation.

**What is never produced.** Invented biome or terrain data, fabricated structure confirmations, chest loot, mob positions, or Bedrock Edition results. Where the engine is unavailable the map reports terrain as unavailable rather than guessing.

A marker labelled "candidate" means the region grid position is correct but the biome check has not run. It is not a guarantee that the structure exists, and should not be cited as one.

Java Edition only, versions 1.13 to 1.21. Bedrock Edition uses a different world generation implementation, so a Java map of the same seed would not match it.

Seeds are signed 64-bit integers, -9223372036854775808 to 9223372036854775807.

MineSeedMap is an unofficial fan tool. It is not affiliated with, endorsed by, or associated with Mojang Studios or Microsoft. Minecraft is a trademark of Mojang Studios.

## Core pages

- [Home](https://minecraftseedmap.org/): seed entry and an overview of what the map does
- [Seed map](https://minecraftseedmap.org/seed): enter a seed and explore the world
- [Biomes](https://minecraftseedmap.org/biomes): all 62 biomes, with identifiers and palette
- [Structures](https://minecraftseedmap.org/structures): all 22 structures, with placement values
- [Versions](https://minecraftseedmap.org/versions): supported Minecraft versions and their generation profiles
- [Dimensions](https://minecraftseedmap.org/dimensions): Overworld, Nether and End
- [Tools](https://minecraftseedmap.org/tools): seed finder, structure finder, biome finder, coordinate converter
- [Blog](https://minecraftseedmap.org/blog): articles on world generation, seeds and structures
- [FAQ](https://minecraftseedmap.org/faq): common questions, with answers as structured data

## Documentation

- [Documentation index](https://minecraftseedmap.org/docs): how the site works, start here
- [Seed map architecture](https://minecraftseedmap.org/docs/seed-map): worker pipeline, tiling and the generation engine
- [API](https://minecraftseedmap.org/docs/api): endpoints, URL patterns and usage limits
- [Structures reference](https://minecraftseedmap.org/docs/structures): the region placement algorithm and per-structure values
- [Biomes reference](https://minecraftseedmap.org/docs/biomes): biome identifiers and the map palette
- [Version reference](https://minecraftseedmap.org/docs/minecraft-versions): which generation profile each version uses

## Machine-readable data

- [Versions JSON](https://minecraftseedmap.org/api/versions): supported versions and generation profiles
- [Structures JSON](https://minecraftseedmap.org/api/structures): structure registry with spacing, separation and salt
- [Biomes JSON](https://minecraftseedmap.org/api/biomes): biome registry with palette
- [Sitemap index](https://minecraftseedmap.org/sitemap-index.xml): every indexable URL, split by section

These are static files. Please cache them rather than polling.

## URL patterns

- [Seed map, latest version](https://minecraftseedmap.org/seed/<seed>): canonical page for a seed
- [Seed map, pinned version](https://minecraftseedmap.org/seed/<seed>/<version>): canonical page for a seed on one version
- [Biome page](https://minecraftseedmap.org/biomes/<biome>): one page per biome identifier
- [Structure page](https://minecraftseedmap.org/structures/<structure>): one page per structure identifier
- [Version page](https://minecraftseedmap.org/versions/<version>): one page per supported version
- [Guide](https://minecraftseedmap.org/guides/<slug>): one page per guide

Permalink query URLs such as `/seed/<seed>?x=&z=&zoom=&layers=` describe a camera position rather than a distinct document. They are noindex duplicates of the canonical path and should not be crawled or cited.

## Guides

- [How to find your Minecraft seed](https://minecraftseedmap.org/guides/how-to-find-a-minecraft-seed): Three ways to find the seed of an existing Minecraft world: the /seed command, the world save files, and the world creation screen.
- [How to use a Minecraft seed map](https://minecraftseedmap.org/guides/how-to-use-a-minecraft-seed-map): A walkthrough of the seed map: entering a seed, choosing a version and dimension, toggling layers, reading coordinates and sharing a permalink.
- [How to find a village in Minecraft](https://minecraftseedmap.org/guides/how-to-find-a-village): Find villages fast using a seed map: which biomes they need, how the 34-chunk region grid works, and what to do when a candidate turns out empty.
- [How to find a stronghold in Minecraft](https://minecraftseedmap.org/guides/how-to-find-a-stronghold): How stronghold placement actually works — eight concentric rings around the origin — and how to triangulate one with eyes of ender.
- [How to find an ancient city in Minecraft](https://minecraftseedmap.org/guides/how-to-find-an-ancient-city): Ancient cities generate only in the deep dark, deep below mountainous terrain. How to locate one on a seed map and survive the trip.
- [How to find a woodland mansion in Minecraft](https://minecraftseedmap.org/guides/how-to-find-a-woodland-mansion): Woodland mansions are the rarest surface structure in Minecraft. How the 80-chunk grid works, why mansions are so far away, and how to reach one safely.
- [How Minecraft structure placement works](https://minecraftseedmap.org/guides/how-to-find-minecraft-structures): The region grid, spacing, separation and salts: how Minecraft decides where structures can generate, and why some map markers never produce a building.
- [Minecraft seed map guide](https://minecraftseedmap.org/guides/minecraft-seed-map-guide): A reference for everything a Minecraft seed map can and cannot tell you: coordinates, chunks, regions, slime chunks, dimensions and accuracy limits.

## Optional

- [About](https://minecraftseedmap.org/about): what the project is and who maintains it
- [Contact](https://minecraftseedmap.org/contact): bug reports and generation mismatches
- [Privacy](https://minecraftseedmap.org/privacy): what is and is not collected
- [Terms](https://minecraftseedmap.org/terms): terms of use
- [Full text](https://minecraftseedmap.org/llms-full.txt): this index expanded with the full reference data inline
- [Source](https://github.com/mineseedmap/mineseedmap): the repository
- [Email](mailto:jantrahtech@gmail.com): direct contact