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Seeder
What it is
Seeder is a free, open-source browser app for discovering and examining Minecraft Java and Bedrock seeds. Interactive maps cover the Overworld, Nether, and End, showing biomes, spawn areas, strongholds, structures, and slime chunks. Its finder searches for combinations of biomes and structures and includes presets for survival starts, speedruns, builders, and other searches. Additional tools include a Nether portal calculator, stronghold finder, slime chunk and structure finders, circle and sphere generator, and seed poster maker. Users can share seeds or searches by link, share seed images, and export results as CSV or JSON. Java support spans Beta 1.7 to 26.3; Bedrock support spans 1.18 through versions 26.50–26.52. Searches run locally in the browser using cubiomes compiled to WebAssembly. Seeder has no accounts or server of its own, and browser storage holds up to 50 worlds and 200 locations per world.
For and against
For
- Maps biomes, structures, and slime chunks
- Searches multiple biome and structure conditions
- Supports Java and Bedrock editions
- Exports results as CSV or JSON
- No account required
Against
- Searches can slow the device
- Browser data may be wiped
- Bedrock structure predictions can be inaccurate
- Supported by ads and donations
The verdict
Seeder offers broad seed-search and mapping tools without requiring an account or installation. Users should export backups and allow for slower searches or Bedrock prediction limits.
Who it suits
It suits Minecraft players who need seed maps, biome or structure searches, and sharing tools in a browser. Builders, speedrunners, and survival players can use its search presets.
Plans and prices
Free
Free to use · supported by ads and donations
Read 11 Oct 2026 · mcseeder.com
On the record
- Analytics details
- The maker says Google Analytics 4 does not store IP addresses and data is kept for 14 months; typed coordinates, world names, notes, and other written text are not collected.mcseeder.com · read 11 Oct 2026
- Bedrock limitations
- The maker cautions that Bedrock structure predictions can be inaccurate, the spawn is estimated, and the End's outer islands may differ.mcseeder.com · read 11 Oct 2026
- Browser processing
- World generation and searches run in the user's browser using cubiomes compiled to WebAssembly, and the site says typed search input is not uploaded.mcseeder.com · read 11 Oct 2026
- Funding
- Seeder is free and funded by ads and donations.mcseeder.com · read 11 Oct 2026
- Maker
- The About page identifies the maker as TrinTragula on GitHub; it does not state a headquarters or founding date.mcseeder.com · read 11 Oct 2026
- Performance
- Seed searches are CPU intensive and may slow the user's device; the maker says biome searches can be especially slow from Minecraft 1.18 onward.mcseeder.com · read 11 Oct 2026
- Privacy
- Seeder says it has no accounts or server of its own; saved worlds and locations stay in the browser, while Google Analytics and AdSense are used.mcseeder.com · read 11 Oct 2026
- Purpose
- Seeder is a browser app for finding, showing, sharing, and exploring Minecraft Java and Bedrock seeds.mcseeder.com · read 11 Oct 2026
- Saved-world limits
- The browser can store up to 50 worlds and 200 locations per world, and the maker says users must export backups because browser data may be wiped.mcseeder.com · read 11 Oct 2026
- Seed finder
- The finder searches for seeds matching multiple biomes and structures and offers presets for survival starts, speedruns, builders, and other searches.mcseeder.com · read 11 Oct 2026
- Seed maps
- Its interactive maps show biomes, spawn, strongholds, structures, and slime chunks across the Overworld, Nether, and End.mcseeder.com · read 11 Oct 2026
- Sharing and exports
- Users can share seeds and searches by link, share seed images, and export finder results as CSV or JSON.mcseeder.com · read 11 Oct 2026
- Support
- Users can report bugs and ideas on GitHub or contact the maker by email or Twitter; the site also accepts donations.mcseeder.com · read 11 Oct 2026
- Supported editions
- The site supports Java Edition from Beta 1.7 to 26.3 and Bedrock Edition from 1.18 through versions 26.50–26.52.mcseeder.com · read 11 Oct 2026
- Tools
- Browser tools include a Nether portal calculator, stronghold finder, slime chunk and structure finders, circle and sphere generator, and seed poster maker.mcseeder.com · read 11 Oct 2026
