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Modern Model Format

Allows 1.21.11 models to load in older versions

Fabric
Loaders
Fabric
Downloads on Modrinth
278
Followers on Modrinth
4
versions
3
Updated
July 19, 2026Jul 19
Published
in 2026
Example Showcase (Block) · swipe

At a glance

Runs on Fabric
For Minecraft 1.19.3–1.21.3
Client only — no need to install it on the server
Latest version — 1.3.0_1.19.3-1.21.3 from July 19, 2026
License GPL-3.0-or-later — free
Where it's needed
In gamerequiredOn servernot needed

Install in the game only; not needed on the server

Game versions1.19.3–1.21.3

github banner github issues

Allows the use of the 1.21.11 model format in older versions with the help of black magic, specifically allowing all three axis (XYZ) rotation and incrementes larger/smaller than 22.5°, additionally removing the 3x3x3 size constraint.

Example

Showcase of the mod featuring a diamond block with three axis rotation

Model

File: assets/minecraft/models/block/diamond_block.json

{
  "format_version": "1.21.11",
  "textures": {
    "all": "block/diamond_block"
  },
  "elements": [
    {
      "from": [0, 0, 0],
      "to": [16, 16, 16],
      "rotation": {"x": 45, "y": 45, "z": 45, "origin": [8, 8, 8]},
      "faces": {
        "north": {"uv": [0, 0, 16, 16], "texture": "#all"},
        "east": {"uv": [0, 0, 16, 16], "texture": "#all"},
        "south": {"uv": [0, 0, 16, 16], "texture": "#all"},
        "west": {"uv": [0, 0, 16, 16], "texture": "#all"},
        "up": {"uv": [0, 0, 16, 16], "texture": "#all"},
        "down": {"uv": [0, 0, 16, 16], "texture": "#all"}
      }
    }
  ]
}

Supports both rotation types:

All axis rotation

  "rotation": {
    "x": 45,
    "y": 45,
    "z": 45,
    "origin": [
      8,
      8,
      8
    ]
  }

Single axis rotation

  "rotation": {
    "angle": 45,
    "axis": "y",
    "origin": [
      8,
      8,
      8
    ]
  }

Maven

repositories {
  maven { url 'https://jitpack.io' }
}

dependencies {
  modImplementation 'com.github.Nico44YT:ModernModelFormat:<version>'
}

Version generally is comprised of "<mod_version>_<game_version_range>" e.g: "1.3.0-1.19.3-1.21.3"

Issues

If you have found an issue please report it on the github, along with (if applicable):

  • any logs
  • the model
  • a screenshot
  • the game version
  • modlist
My models are not loading anymore

Try checking the model file for any extra brackets {} because Modern Model Format ensure a strict json validation.

Example:

[18:30:32] [Worker-Main-2/ERROR]: Failed to load model mod_id:models/item/example_item.json
com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 506 path $

FAQ

How to install Modern Model Format?

Install Fabric for your Minecraft version, download Modern Model Format for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Modern Model Format support?

Modern Model Format has builds for Minecraft 1.19.3–1.21.3.

Is Modern Model Format needed on the server?

Client only — no need to install it on the server

License and source
GNU General Public License v3.0 or laterfree to use and share; changes to the mod itself must be published under the same license
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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