Start exploring
A seed is the starting point.
Explore possibilities without uploading a world. Biomechart is a local prototype, not an existing-save reader. Public app launch is still ahead.
1. Choose your world
Open Explore, enter a signed 64-bit numeric seed, and choose an edition. Java supports 26.1, 26.2 and 26.3 (the default). Bedrock offers an unvalidated Java-based Overworld surface-biome approximation only.
Choose Show map to apply the seed, edition and version. Editing these fields alone does not change the displayed world. Panning continues to explore the applied world until you choose Show map again.
Only vanilla default generation in fresh Overworld chunks is in scope. Custom generation, mods and upgraded chunks may disagree. Read the edition and prediction limits before relying on a result.
2. Explore the current view
Start with Surface → Biomes. Drag with a mouse to pan and use + / − to zoom. On a touchscreen, enable Touch pan to drag; leave it off to scroll the page.
Use the biome finder to highlight matches in the current view. In Java, switch to POIs, check the types you want, then choose Find POIs. These are experimental candidates, not confirmed discoveries.
3. Save a world and a place
Choose Save World below Show map, give the displayed world a name, and save. Select a prediction and choose Save this place, or use Add place on map to record your own coordinates.
Add notes and explicitly save. Found and Visited are your records, not automatic Minecraft tracking. Open Journal to browse saved worlds and places.