# Minecraft tools

Updated on 2026-09-29. Source: https://mcseeder.com/tools/

Free Minecraft Java tools that run in your browser: calculators, seed finders and building helpers. Nothing to install, nothing to upload!

## Coordinates/navigation

- [Nether portal calculator](https://mcseeder.com/tools/nether-portal-calculator/): Overworld to Nether coordinates converter, and vice versa. Especially useful when you're trying to build linked portals.
- [Stronghold finder (end portal)](https://mcseeder.com/tools/stronghold-finder/): Throw two eyes of ender, write where they flew, get the stronghold's coords. No seed needed.

## Seed finders

- [Slime chunk finder](https://mcseeder.com/tools/slime-chunk-finder/): All the slime chunks of your world on a grid, with a list of the best spots to AFK at, so you can activate as many slime chunks as possible around you.

## Building

- [Circle and sphere generator](https://mcseeder.com/tools/circle-generator/): Pixel circles, ovals, spheres and domes, block by block and layer by layer, with the number of blocks you need.