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Crafty Seed Map
What it is
Crafty Seed Map is a free web tool for Minecraft Java players who want to inspect a seed’s terrain and locate biomes, slime chunks, and structures. Enter a numeric seed or text seed; text seeds are hashed using the game’s method. The map can display the Overworld, Nether, and End, and a nearest-search feature works outward from an origin while checking structure candidates against biome requirements. Named, colored markers are saved in the browser for each seed. A shareable URL retains the seed, viewport, map layers, and biome highlight. World generation runs locally in the browser, and the seed is not sent to a server. The biome layer uses a WebAssembly port of cubiomes, with structure positions checked against biomes. It supports Java Edition 1.18.2, 1.19.4, 1.20.6, 1.21.1, and 1.21.3, but not Bedrock Edition. The map is described as mobile-first, includes pinch-to-zoom, and has no ads. Buried treasure, mineshafts, geodes, desert wells, and end gateways are visible only at close zoom levels.
For and against
For
- Free in-browser seed viewer.
- Shows the Overworld, Nether, and End.
- Saved markers and shareable map URLs.
- World generation runs locally in the browser.
- Mobile-first design with pinch-to-zoom.
Against
- Bedrock Edition is not supported.
- Some structures require close zoom to appear.
- Supports only five listed Java versions.
The verdict
Crafty Seed Map brings seed terrain, biome, and structure information together in a browser-based viewer. Check its listed Java version support and zoom-dependent structure visibility before relying on it for a specific map.
Who it suits
It suits Minecraft Java players planning around terrain, biomes, slime chunks, and structures. It is not for Bedrock Edition players.
Plans and prices
Free
Free in-browser seed viewer · Java Edition only · supports Java 1.18.2, 1.19.4, 1.20.6, 1.21.1 and 1.21.3
Read 5 Oct 2026 · crafty.gg
On the record
- Ads
- The map is described as having no ads.crafty.gg · read 5 Oct 2026
- Dimensions
- The map can show the Overworld, Nether and End.crafty.gg · read 5 Oct 2026
- Feature limit
- Buried treasure, mineshafts, geodes, desert wells and end gateways appear only when zoomed in far enough.crafty.gg · read 5 Oct 2026
- Intended users
- The tool is for Minecraft Java players who want to inspect seed terrain and plan around biome and structure locations.crafty.gg · read 5 Oct 2026
- Local processing
- The page says world generation runs locally in the browser and the seed is never sent to a server.crafty.gg · read 5 Oct 2026
- Markers and sharing
- Named, colored markers are saved in the browser per seed, and the URL captures the seed, viewport, layers and biome highlight for sharing or bookmarking.crafty.gg · read 5 Oct 2026
- Mobile use
- The map is described as mobile-first and has pinch-to-zoom controls.crafty.gg · read 5 Oct 2026
- Purpose
- Maps biomes, slime chunks and structures for Minecraft Java seeds.crafty.gg · read 5 Oct 2026
- Security and privacy
- The site privacy policy says it uses reasonable administrative, technical and physical safeguards, while noting that data transmission cannot be guaranteed secure.crafty.gg · read 5 Oct 2026
- Seed input
- Accepts numeric or text seeds, with text seeds hashed the way the game does.crafty.gg · read 5 Oct 2026
- Structure search
- A nearest-search tool spirals from an origin and biome-validates structure candidates.crafty.gg · read 5 Oct 2026
- Support
- The site lists [email protected] as its contact email.crafty.gg · read 5 Oct 2026
- Technology
- The biome layer uses a WebAssembly port of cubiomes, and structure positions are revalidated against biomes.crafty.gg · read 5 Oct 2026
- Version support
- The map supports Java Edition 1.18.2, 1.19.4, 1.20.6, 1.21.1 and 1.21.3; Bedrock Edition is not supported.crafty.gg · read 5 Oct 2026
