About MC Seed Map

The Creator

Hi, I'm Gio Nui. I'm a developer and longtime Minecraft enthusiast who builds tools for the Minecraft community. I run several Minecraft related websites, and MC Seed Map is one of the projects I'm most proud of.

I built MC Seed Map because existing seed viewers fell short in one way or another. Some only supported Java Edition, others required downloading software, and many were slow or cluttered with ads. I wanted a fast, clean, browser based tool that works for both Java and Bedrock players, and that respects your privacy by doing all computation locally.

What MC Seed Map Does

• Biome mapping: enter any seed and see a full color biome map at up to 4 blocks per pixel resolution.
• Structure finding: locate villages, temples, monuments, strongholds, bastions, ancient cities, trial chambers, and over a dozen more structure types.
• Java Edition: versions 1.7 through 1.21.5, powered by the cubiomes C library.
• Bedrock Edition:versions 1.16 through 1.21.60, with a custom implementation matching Bedrock's PRNG.
• Spawn point calculation: shows exactly where players will spawn for any seed.

Technology

Biome and structure generation is powered by cubiomes, an open source C library by Cubitect that reimplements Minecraft's world generation algorithm with pixel level accuracy. It is compiled to WebAssembly so it runs at near native speed directly in your browser.

Bedrock Edition support is built on a custom TypeScript implementation of Bedrock's Mersenne Twister PRNG and structure finder, verified against reference implementations.

The site is built with Next.js and TypeScript. All computation runs locally. Your seed never leaves your device.

Accuracy

I continuously verify structure positions and biome rendering against in game results and reference tools. If you find something wrong, I want to hear about it so I can fix it.

Not affiliated with or endorsed by Mojang Studios or Microsoft. Minecraft is a registered trademark of Mojang Studios AB.