1.21.6 Pre-Release 2 — release journal
What 1.21.6-pre2 changed for data packs, measured against 1.21.6-pre1, the build before it. Released 2025-06-02; development build — not a release.
💡 No measured change
Same data pack format, same registries. That is the strongest safe-for-data-packs signal a diff can give, and it is still not proof — behaviour changes and bug fixes are invisible to it.
Formats
| 1.21.6-pre1 | 1.21.6-pre2 | |
|---|---|---|
| Data pack format | 79.0 | 79.0 |
| Resource pack format | 63.0 | 63.0 |
| Data version | 4430 | 4431 |
Registries
No registry gained, lost or changed an entry.
The official notes
Read the 1.21.6 Pre-Release 2 article on minecraft.net.
That article's technical changes are grouped under these headings — open it for the detail:
- Dialogs
Minecraft Wiki page for 1.21.6-pre2.
In the journal
← 1.21.6-pre1 · All builds · 1.21.6-pre3 →
Sources
- misode/mcmeta — 1.21.6-pre2 summary — formats and registries, generated from the game’s own data.
- minecraft.net — 1.21.6 Pre-Release 2 — section names only.