For technical reasons, you need to know the seed of your world to use Mineshaft Finder, unless, of course, you want to find a seed for a new world. If you're playing SSP, the app is able to fetch the seed from your savegame. Alternatively, you can use the /seed command ingame. In SMP, you can use the same command if you have sufficient rights. Otherwise, however, you're dependent on the server owner, who started the world and has access to the savegame and config files.
This app uses some relatively new web technologies. As a result, some features may be disabled for older browsers. I recommend using the latest version of a major browser such as Chrome, Firefox, Edge or Safari.
- Drag: move the map
- Mouse wheel: adjust zoom level
- Right-click: set a red pin and fill in the coordinate inputs below the map
- Double click: toggle expanded map view
- Arrow keys: move the map (mouse cursor must be over the map)
- R key: randomize seed (mouse cursor must be over the map)
- Escape key: disable expanded view
- Drag: move the map
- Tap: show coordinates below the map
- Pinch: adjust zoom level
- Tap and hold: set a red pin and fill in the coordinate inputs below the map
- Double tap: toggle expanded map view
The first thing you should do is select a seed and version. You can either type it in manually, or you can load it from your savegame. The latter can be done by clicking on "Load from Save..." and selecting your level.dat, or by drag&dropping the level.dat file into your browser window. Level.dat is a small file located in the folder of every Minecraft savegame. You can find the savegames in the saves folder of your Minecraft installation. On Windows you can use %appdata%\.minecraft\saves to get to that folder.
You should also know that a seed is always a number (up to around 20 digits). If you type in anything else (like letters), it will be converted to a number. The app does this the same way Minecraft does, so it's safe to use letters (and other characters) as well.
Thanks to Earthcomputer for his work on bedrockified, which made it possible to support Bedrock Edition.