Supported Minecraft versions
World generation changes between Minecraft releases, so a seed map is only accurate when it is told which version to generate. These are the Java Edition versions MineSeedMap supports.
Picking the wrong version is the most common reason a seed map disagrees with a world. Village spacing changed in 1.18, biome selection moved to 3D climate noise in the same release, and several structures simply did not exist in older versions.
| Version | Released | What changed |
|---|---|---|
| Java 1.21 – 1.21.11 | 2024-06-13 | Trial chambers, the vaults update line and the current world generation ruleset. |
| Java 1.20 – 1.20.6 | 2023-06-07 | Trails & Tales: trail ruins, cherry grove biome and sniffer content. |
| Java 1.19 – 1.19.4 | 2022-06-07 | The Wild Update: deep dark, ancient cities, mangrove swamps. |
| Java 1.18 – 1.18.2 | 2021-11-30 | Caves & Cliffs part II. Terrain height changed to -64…320 and biomes moved to 3D climate noise. |
| Java 1.17 – 1.17.1 | 2021-06-08 | Caves & Cliffs part I. World shape still uses the pre-1.18 layered biome stack. |
| Java 1.16 – 1.16.5 | 2020-06-23 | Nether Update: nether biomes, bastion remnants and ruined portals. |
| Java 1.15 – 1.15.2 | 2019-12-10 | Buzzy Bees. World generation is unchanged from 1.14. |
| Java 1.14 – 1.14.4 | 2019-04-23 | Village & Pillage: reworked villages, pillager outposts, ruined village layouts. |
| Java 1.13 – 1.13.2 | 2018-07-18 | Update Aquatic: ocean biomes, shipwrecks, buried treasure and ocean ruins. |
Bedrock Edition
Bedrock Edition uses a separate world generation implementation. A Java map of the same seed will not match a Bedrock world, so MineSeedMap deliberately supports Java Edition only rather than showing results that would be wrong.
Adding a version
Versions are declared in one registry file and mapped to a generation profile. Adding a release is a data change plus, where generation actually differs, a new profile in the engine. See the developer notes →