Minecraft Versions
Minecraft changed how custom item models work across recent releases, so the Vanilla generator asks for your target version and builds the pack in the correct format for it. Pick the version your server runs.
Supported versions
1.20.41.20.61.21.11.21.31.21.41.21.51.21.6
Two format families
Modern (1.21.4+)
From 1.21.4 onward, Minecraft uses the dedicated item-model system. Custom items are defined
under the resource pack’s items/ structure and referenced by an item-model id. This is the
recommended target for new servers — it’s the format Mojang is building on going forward.
The “What the pack includes” summary in the tool updates as you change the version, so you can always see which format and outputs you’ll receive before generating.
Picking the right version
- Match your server exactly. A pack built for 1.21.4+ won’t render correctly on 1.20.x and vice versa, because the underlying model format differs.
- Not sure? Check your server jar version or ask your host. When in doubt for a fresh setup on a recent release, 1.21.4 is a solid default.
Always test the pack on a copy of your server before deploying to production, especially when crossing the 1.21.4 format boundary.