Seeder is a browser-based Minecraft seed finder and analysis tool that helps players discover worlds suited to their preferred style of play. Supporting Java and Bedrock editions across a range of versions, it offers interactive maps of the Overworld, Nether, and End, with tools to locate biomes, spawn points, strongholds, and other structures. Its advanced finder searches for seeds matching chosen combinations of biomes and structures, which users can open, save, and share.

Players can also explore curated seed lists featuring map previews and coordinates for notable locations, or use practical tools to plan Nether portals, farms, and builds, locate structures and biomes, and create circles. The My Worlds feature keeps saved worlds and recently viewed seeds together, supports location markers, and allows worlds with marked locations to be shared by link. Seeder runs its world-generation searches in the user’s browser and says that search data is not uploaded.

The service is free, supported by advertising and donations, and is not an official Minecraft product or affiliated with Mojang or Microsoft