Talk:World seed

So, I read an article where someone's server kept crashing and a new random seed would be assigned each time it was restarted, however, because some of the chunks had already been generated they kept the biomes from their original seeds resulting in a mish mash of numerous seeds with strange chunk boarders. Is there any way to force something like this, or achieve a similar end result? I have a server that has used a random seed and generated a large proportion of the chunks around spawn, but I want to use a different seed to generate the rest as there is not much variety in the biomes. 120.145.187.38 09:24, 6 January 2015 (UTC) Kaleb

You can change the seed with an NBT editor; it's in the world/level.dat file. -- Orthotope^talk 20:17, 6 January 2015 (UTC)

Thanks, would you be able to link an editor? Also, is it difficut to find in the .dat file, what should I be looking for? 120.145.187.38 13:05, 7 January 2015 (UTC)Kaleb

NBTExplorer. --Nick the Red³⁷ — ru.wiki moderator (talk) 13:10, 7 January 2015 (UTC)

can there be a section about has the world uses the seed for generationThe Bumblebee^{👁 Image}
22:48, 16 July 2020 (UTC)

Could we add an explanation of "shadow seeds", or at least agknowledge their existance in the Trivia section? --AccurateJany (talk) 23:58, 7 August 2020 (UTC)

I provided this in the Biome article Delvin4519 (talk) 17:52, 6 September 2020 (UTC)

this needs no explanation. Bugs do happen. Like this bug report I just posted: --IronMan2010 (talk) 00:26, 15 December 2020 (UTC)MC-208455IronMan2010 (talk) 00:26, 15 December 2020 (UTC)

That is not even a bug. The Great Spring (talk | contribs) (Tagalog translation) 00:28, 15 December 2020 (UTC)

I've also experienced this. This is something that definitely needs an explanation. If there's suppose to be like a million billion different seeds and they're suppose to be random, then how come I got the same one twice in only 4 tries? And 1 of those was created on a fresh game install on a different computer. It makes me think there's some kind of "default seeds" that aren't random at all. GMRE (talk) 17:32, 14 May 2023 (UTC)

Maybe add a few seeds for odd generation like those explored by youtubers like Antvenom(Java) and Ibxtoycat(Bedrock) or survival islands.

Their are probably millions of survival islands and tens of millions of broken seeds (like repeating caves within render distance).Humiebee (talk) 15:50, 20 February 2021 (UTC)

Actually, seeds showcased by antvenom like shadow seeds and 1-chunk 32-bit caves are included as well. The terrain generation breaking on the surface is also mentioned.Humiebee (talk) 15:55, 20 February 2021 (UTC)

I imagine I've seen a video from someone who broke down what different parts of a seed mean (examples: Terrain, Structure, etc.)

Lopolin (talk) 15:35, 4 September 2021 (UTC)

No, it is just a random integer. If you use short ones (like 13 or -452) it still works, so there are no "parts" that have different meanings. Windwend (talk) 18:33, 4 September 2021 (UTC)

In his recent video https://www.youtube.com/watch?v=BbGUHAUfpv4, AntVenom "sort of" discovered 7 different seed (3 affects the world generation on all dimensions) used for world generation in the level.dat file that are seperate from the master seed and modifying it can make a world that looks different on the same seed. Apparently it was added in 1.16 snapshots at the same time experimental support for custom worlds were added.

I think it should be split into "World Generation". ZaLink700 17:57, 22 June 2022 (UTC)

The word you were looking for is "rename", or "move". Not "split". But yes, you have the right idea. Using the word "level" here makes no sense. GMRE (talk) 17:32, 14 May 2023 (UTC)

I've read/heard somewhere that on the bedrock edition, the same seed is 100% guaranteed to always result in not only every village being at the same spot, but even every chest will have the same loot.

Meanwhile, as I've found out on the Java edition, while the villages generate at the same place, the layout of the village is always randomized. And some structures, like ruined portals and dungeons always have randomized locations. But for example woodland mansions, ancient cities and terrible fortresses are 100% guaranteed to be in the same place and have identical layout/contents. GMRE (talk) 17:32, 14 May 2023 (UTC)

Pocket Edition versions up until 0.10 used a Unix timestamp (https://unixtime.org/) as the seed, if no seed was entered. I discovered this whilst looking through some old worlds. It seems this is very rarely mentioned online. It could also potentially help somebody with a very old world work out the exact second it was created. I'm not exactly sure when this was added however.

The change seems to have been made at the same time as Pocket Edition switched to using a random string for the world folder name. Iron Ore (talk) 20:46, 3 May 2024 (UTC)

In Revision 3009362, User:User-12316399 suggested we move to this page to World seed, and 👁 Image
 I agree. --Simanelix ^(T|C) 00:17, 8 June 2025 (UTC)

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 Support this natural disambiguation  Nixinova   T   C   02:07, 8 June 2025 (UTC)

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 Support
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amethyst_hhh^{(talk)(weekly survey)} 03:02, 8 June 2025 (UTC)

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 Support – ZacNVR (talk) 04:37, 8 June 2025 (UTC)

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 Support It is also called world seed in-game in Bedrock Edition (create new world screen). MinecraftBedrockPlayer7 (talk) (contribs) 👁 Image
06:41, 8 June 2025 (UTC)

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 Support. SymORmaK (talk) 12:43, 8 June 2025 (UTC)

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 Support. — 👁 Image
LiteraGame ^{(Talk | Contributions | pt-br)} 04:27, 26 June 2025 (UTC)

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 Done  Nixinova   T   C   07:24, 27 June 2025 (UTC)

In PE 0.9.5 although the game rejects all numbers from -9 to +9 it's possible to create a world with these seeds by inserting an underscore after the seed (like "1_7"). I don't know if this works in other versions (not including 1.18 and later). Sunwukong3203 (talk) 22:27, 22 June 2025 (UTC)

0 through 9 have been rejected in PE and BE for a long time. The ability to enter these seeds in directly was only added just recently. -- Simanelix ^(T|C) 22:45, 22 June 2025 (UTC)

The ability to use seeds -9 through 9 was added in Bedrock Edition beta 1.18.20.21. -- Simanelix ^(T|C) 22:46, 22 June 2025 (UTC)

it would say "Convering World" only! Debug4jItem (talk) 15:46, 16 June 2026 (UTC)